Emc 020-001 (Practice) Storage Foundations Exam By

When a server is connected to an array, the element responsible for storing customer and product information is the database. A database is a structured collection of data that is organized, managed, and accessed in a way that allows for efficient storage, retrieval, and modification. It is specifically designed to handle large volumes of data and provide a reliable and secure storage solution. Therefore, in this scenario, the database would be the most suitable element for storing customer and product information.

As part of monitoring server performance, memory utilization is an important factor to consider. Memory is a crucial resource for running applications and processes on a server. Monitoring memory utilization helps to ensure that the server has enough memory available to handle the workload efficiently. By tracking memory usage, administrators can identify any potential memory leaks or excessive memory consumption that may lead to performance issues or system crashes. Monitoring memory utilization allows for proactive management and optimization of server resources, ensuring smooth and uninterrupted operation.

To perform a successful restore of a local replica created with pointer-based replication technology, it is necessary for the source devices to be healthy. This means that the source devices should be in proper working condition without any issues or errors. If the source devices are not healthy, it may lead to data corruption or loss during the restore process. Therefore, it is crucial to ensure the health and stability of the source devices before proceeding with the restore operation.

The stripe size in a RAID 0 set is determined by the number of disks in the set and the stripe depth. In this case, there are five disks and a stripe depth of 128 blocks (64 kB). To calculate the stripe size, we multiply the stripe depth by the block size. Since each block is 64 kB, the stripe size would be 128 blocks * 64 kB = 8192 kB, which is equal to 320 kB.

Availability is the management task that eliminates single points of failure in a data center. This means ensuring that all critical systems and components are redundant and have backup options in place, so that if one fails, there is another one to take over. This helps to ensure continuous operation and minimize downtime in case of any failures or disruptions. By implementing measures such as redundant power supplies, backup generators, and failover mechanisms, availability management aims to eliminate any single point of failure that could potentially disrupt the normal functioning of the data center.

Logical Volume mirroring is a remote replication technology that absolutely requires host involvement. This technology involves creating an exact copy of a logical volume on a different storage system, which requires the host to be involved in the replication process. The host is responsible for initiating and managing the mirroring process, ensuring that the replicated volume stays synchronized with the original volume. This level of host involvement is necessary to ensure the integrity and consistency of the mirrored data.

The Recover Point Objective (RPO) of this plan is five minutes. This means that the remote site B will hold a copy of data that is 5 minutes behind the production data at site A.

The maximum amount of data that will be missing at site B in the event of a site failure at A is 2 hours. This is because data is being replicated from site A to site B every hour using disk buffering. Therefore, if site A fails, the most recent data that would have been replicated to site B is from 2 hours ago.

The correct answer is HDA. HDA stands for Head Disk Assembly, which is the drive subassembly that contains the platters and Read/Write heads. This component is responsible for the actual reading and writing of data on the hard drive. ATA, HBA, and IDE are not the correct answers as they do not specifically refer to the subassembly containing the platters and R/W heads.

A Fibre Channel SAN is a dedicated storage network that is specifically designed for connecting storage devices to servers. It provides high-speed, reliable, and scalable connectivity for storage systems, allowing for efficient data transfer and storage management. Unlike other types of networks, such as global inter-connectivity networks or multi-purpose systems networks, a Fibre Channel SAN is solely focused on providing a dedicated infrastructure for storage purposes.

Provisioning, monitoring, and reporting are three key data center management activities that are interdependent. Provisioning involves the process of setting up and configuring resources such as servers, storage, and networking equipment. Monitoring refers to continuously monitoring the performance and health of these resources to ensure they are functioning optimally. Reporting involves generating and analyzing reports on the data center's performance and resource utilization. These activities are interdependent as monitoring is necessary to identify any issues or bottlenecks, which can then be addressed through provisioning. Additionally, reporting provides valuable insights into the data center's performance and helps in making informed decisions for future provisioning and resource allocation.

Capacity management is a key management task that applies to all data center elements. It involves monitoring and planning the resources required to meet the demands of the data center, such as storage, processing power, and network bandwidth. By effectively managing capacity, data center operators can ensure that there is enough resources available to support the workload and avoid any performance issues or downtime. This task is essential for maintaining the efficiency and reliability of the data center infrastructure.

A disadvantage of a Fibre Channel hub when compared to a Fibre Channel switch is limited performance. A hub operates at a lower speed because it shares the available bandwidth among all connected devices. This can result in slower data transfer rates and increased latency compared to a switch, which provides dedicated bandwidth to each connected device.

Implementing an iSCSI solution allows for the utilization of existing IP infrastructure, which can save on costs and simplify deployment. This means that organizations do not have to invest in additional networking equipment or separate storage networks. Instead, they can leverage their existing Ethernet infrastructure to connect storage devices and servers, making it a cost-effective solution. Additionally, iSCSI offers flexibility and scalability, as it can be easily integrated into existing network configurations.

The purpose of iSNS is to assist with the discovery of iSCSI targets. iSNS stands for Internet Storage Name Service and it helps in the dynamic discovery and management of iSCSI devices on a network. It provides a centralized repository for iSCSI target information, allowing initiators to easily locate and connect to available targets. This helps in simplifying the configuration and management of iSCSI storage devices in a network environment.

A head crash is an event where the read/write head of a hard disk drive comes into contact with the disk's data area. This can cause physical damage to the disk and result in data loss.

The actuator arm assembly is responsible for positioning the R/W heads in a disk drive. This component consists of a mechanical arm that moves the heads across the surface of the disk to access different data tracks. By controlling the movement of the actuator arm assembly, the disk drive can accurately position the R/W heads to read or write data on the desired track.

In the SAN Core/Edge exhibit, the E Port is identified as port 1 and the Edge switch is identified as port 6.

WWN zoning should be employed if the primary concern in a SAN is cabling flexibility. WWN (World Wide Name) zoning is a method of zoning that uses the unique identifier of each device's WWN to control access to specific zones. This allows for more flexibility in cabling because devices can be easily moved or added without the need to reconfigure the zoning. Hard zoning, mixed zoning, and port zoning are other methods of zoning in a SAN, but they do not prioritize cabling flexibility as effectively as WWN zoning.

CIFS, which stands for Common Internet File System, is the protocol used by a Windows client to communicate with a NAS (Network Attached Storage) device. CIFS allows the Windows client to access and share files and folders over a network with the NAS device. It is a widely used protocol for file sharing and provides a seamless integration between Windows clients and NAS devices.

To calculate the number of replica devices required, we need to consider the size of each replica and the duration for which it needs to be kept. The application uses ten 9 GB devices, so each replica will also require ten 9 GB devices. Since a full volume local replica is required every 6 hours and each replica needs to be kept for 24 hours, we need to calculate the number of replicas that can be created within 24 hours. 24 hours divided by 6 hours gives us 4 replicas. Therefore, 4 replicas multiplied by 10 devices per replica gives us a total of 40 replica devices required.

The Control Station is the component used to manage and configure the NAS solution. It provides a user interface and management tools to control and monitor the Celerra system. It allows administrators to configure network settings, create and manage file systems, set up user access controls, and perform various administrative tasks. The Control Station plays a crucial role in managing and maintaining the NAS solution efficiently.

SAN (Storage Area Network) provides secure access to data. SANs are designed to provide a dedicated network for storage devices, allowing multiple servers to access the same storage resources. By separating the storage network from the regular network, SANs offer enhanced security for data access. SANs often incorporate features like zoning and LUN masking to control access to specific storage resources and ensure data security. This benefit makes SANs a preferred choice for organizations that require high levels of data security and privacy.

The correct answer is Repository. The repository component of EMC ControlCenter holds the information collected about the Managed Objects. It serves as a centralized database where all the data about the managed objects is stored and can be accessed for analysis and reporting purposes. The repository acts as a central hub for storing and managing the collected information, allowing for efficient data retrieval and management within the ControlCenter system.

Core Edge topology increases connectivity within the SAN while conserving overall port utilization. In this topology, multiple edge switches are connected to a central core switch. The edge switches are responsible for connecting the servers and storage devices, while the core switch handles the interconnection between the edge switches. This design allows for efficient use of ports as the core switch acts as a central hub, reducing the number of connections required between devices. Additionally, it provides high availability and scalability by allowing for easy addition or removal of edge switches without affecting the overall network connectivity.

A disadvantage of storage array based local replication is that it cannot span storage arrays. This means that the replication process is limited to a single storage array and cannot be extended to multiple arrays. This can be a limitation in situations where data needs to be replicated across different arrays for redundancy or scalability purposes.

TCP, or Transmission Control Protocol, is responsible for re-transmitting dropped packets in iSCSI. TCP ensures reliable delivery of data by using acknowledgments and re-transmissions. When a packet is dropped or lost during transmission, TCP detects the loss and requests the sender to retransmit the missing packet. This process continues until all packets are successfully received, ensuring the integrity and reliability of the data transfer in iSCSI.

A fundamental characteristic of a CAS (Content Addressable Storage) implementation is the use of a globally unique identifier for every data object. This means that each data object is assigned a unique identifier that can be used to locate and retrieve the object, regardless of its physical location or storage system. This allows for efficient and reliable data management, as well as seamless scalability and interoperability within the CAS system.

Array-based remote replication is a method of data replication where data is copied from one storage array to another. One of the disadvantages of array-based remote replication is that it cannot manage log shipping. Log shipping is a process of automatically sending transaction logs from a primary database to a secondary database, allowing for continuous data replication and recovery. Since array-based replication focuses on copying data at the block level, it does not have the capability to manage and replicate transaction logs, making it a disadvantage in scenarios where log shipping is required.

The Array receives read/write commands from the Server in a Data Center infrastructure. The Server acts as the intermediary between the Array and other components, such as the Application, Database, and Network. It sends the commands to the Array, which then processes them accordingly.

Bridged SAN topology allows IP initiators to communicate with FC targets. In a bridged SAN, IP traffic is encapsulated and sent over the Fibre Channel network, enabling communication between IP initiators and FC targets. This allows for the integration of IP-based applications and storage devices into a Fibre Channel SAN environment.

The correct answer states that the choice of cylinders used in a partition must be contiguous and may be in the same zone. This means that the cylinders should be physically adjacent to each other, but they can be located within the same zone. This allows for efficient data access and storage within the partition while still maintaining some flexibility in terms of zone placement.

A benefit of a NAS (Network Attached Storage) solution is that it centralizes storage and simplifies management. This means that all the data is stored in one central location, making it easier to access and manage. It eliminates the need for individual storage devices on each host and allows for efficient sharing and collaboration. This also reduces the complexity of managing multiple storage arrays and simplifies the backup and recovery processes.

Flushing file system buffers before creating the replica ensures that all data is written to the file system and that there are no pending writes or cached data. This helps in creating a consistent replica of the file system, as any pending writes could lead to data inconsistencies between the original and replica. By flushing the buffers before creating the replica, the application can ensure that the replica accurately reflects the state of the file system at the time of creation.

The number of files to be backed up directly affects the catalog size in a backup and recovery environment. The catalog is a database that keeps track of all the files that have been backed up, allowing for easy retrieval and recovery when needed. As the number of files increases, so does the size of the catalog. This means that more storage space is required to store the catalog, and it may take longer to search and retrieve specific files from the backup.

Tracking changes to the source and target devices after a point in time replica is created helps to speed up the re-synchronization of the source and target. By keeping track of the changes made to both devices, the system can quickly identify and synchronize only the modified data, rather than having to synchronize the entire data set. This reduces the time and resources required for re-synchronization, improving overall efficiency and minimizing downtime.

The requirement for deploying NAS is global access to data, as Network Attached Storage (NAS) allows multiple users and devices to access and share data over a network. NAS provides a centralized storage solution that can be accessed from anywhere, making it ideal for organizations with distributed teams or remote users who need to collaborate and access data simultaneously.

SONET (Synchronous Optical Network) is the correct answer because it is a network technology that uses time division multiplexing to send data from multiple subscribers as an optical signal. SONET is a standardized protocol that allows for the efficient transmission of large amounts of data over optical fiber networks. It uses time division multiplexing to divide the optical signal into multiple channels, each with its own time slot, allowing for simultaneous transmission of data from multiple subscribers.

In parity-based RAID, the parity is updated each time a write is performed. This means that whenever data is written to the RAID system, the parity information is also updated to ensure data integrity and fault tolerance. This allows for the recovery of data in case of a disk failure. The other options are incorrect because they do not accurately describe how parity is used in RAID systems.

SMI-S stands for Storage Management Initiative Specification. It is a standard layer that resides between managed objects (such as storage devices) and management software. SMI-S provides a common language and set of protocols for storage management, allowing different vendors' storage devices to be managed by a single management software. This standardization simplifies the process of managing storage infrastructure and enables interoperability between different storage systems.

EMC TimeFinder/Mirror implements the Full Volume Mirroring local replication technology. This technology allows for the creation of an exact copy of a volume or storage device, ensuring that all data is replicated in real-time. This can be useful for creating backups or for disaster recovery purposes, as it provides a reliable and consistent copy of the data.

As part of an array capacity check, you monitor the allocated storage. This refers to the amount of storage that has been assigned or allocated to the array. By monitoring the allocated storage, you can ensure that the array has enough capacity to store the data and meet the storage requirements. This helps in preventing any potential storage shortages or capacity issues.

Based on the given information, the file system is backed up every day at 11:00 PM. Since the file system gets corrupted at 3:00 PM on Wednesday, it means that the backup has not yet occurred for that day. Therefore, the correct answer is 3, indicating that the file system is not backed up on Wednesday.

The average rotational latency can be calculated by taking the time it takes for one complete revolution and dividing it by 2. In this case, since the disk drive has a rotational speed of 100 revolutions per second, it would take 1/100th of a second (10 ms) for one complete revolution. Dividing this by 2 gives us an average rotational latency of 5 ms.

The B-series switches can be managed using WebTools.

The CHS values represent the maximum number of cylinders (1000), heads (4), and sectors (25) that the disk can have. To calculate the LBA address range, we multiply these values together: 1000 * 4 * 25 = 100,000. However, since LBA values start from 0, the address range will be from 0 to 99,999.

The two parts of a cache are the data-store and the tag ram. The data-store holds the actual data that is being cached, while the tag ram holds the memory addresses or tags that are associated with the data in the cache. The tag ram is used to quickly determine if a requested memory address is present in the cache, and if so, the corresponding data can be retrieved from the data-store. The combination of the data-store and tag ram allows for faster access to frequently used data, improving overall system performance.

Internal DAS (Direct Attached Storage) refers to the storage devices that are directly connected to a server or a computer system. It is a feature of Internal DAS to provide local storage provisioning, which means that the storage devices are dedicated to a specific server or system and are not shared with other devices. This allows for efficient and direct access to the storage, resulting in faster data transfer and reduced latency. Therefore, the correct answer is local storage provisioning.

When deciding whether or not to deploy IP SAN, a critical design factor to consider is the application response time. This is because the performance and efficiency of the SAN will directly impact the response time of the applications running on it. If the application response time is a crucial factor for the organization, then it becomes essential to evaluate whether an IP SAN can meet the required response time standards.

When a pointer based replica is created, data is copied from the source to the save location for the first write to a location on the source. This means that when any write operation is performed on the source device, the data is immediately copied to the save location. This ensures that the save location stays up to date with the changes made on the source device.

EMC ControlCenter uses Oracle as the repository database. This means that Oracle is the database where EMC ControlCenter stores and manages its data. It is the chosen platform for storing and organizing the information that ControlCenter needs to perform its functions effectively.

Internally deployed block level access storage refers to a storage system that is located within the organization's infrastructure and provides access to data at the block level. This means that data is divided into smaller blocks, which can be accessed and managed individually. This type of storage is typically used for high-performance applications that require fast and direct access to data. It allows for efficient data storage and retrieval, as well as advanced features such as data deduplication and snapshots.

SRDF/S is a remote replication solution on EMC Symmetrix Arrays. It stands for Symmetrix Remote Data Facility/Synchronous and is used for synchronous replication of data between two Symmetrix arrays. SRDF/S ensures that data is mirrored in real-time, providing continuous availability and zero data loss in the event of a disaster or system failure. It is a reliable and efficient solution for business continuity and disaster recovery purposes.

A disk array offers higher speed interconnects compared to JBOD, which means that data can be transferred at a faster rate. Additionally, a disk array provides data protection, ensuring that data is not lost in case of a disk failure. Lastly, a disk array supports multiple host I/O channels, allowing multiple servers to access the storage simultaneously.

As part of a SAN health check, monitoring port status change is important. This involves keeping track of any changes in the status of the ports within the SAN infrastructure. By monitoring port status change, you can identify any issues or abnormalities that may occur, such as ports going offline or experiencing connectivity problems. This allows for proactive troubleshooting and maintenance, ensuring the smooth operation and performance of the SAN.

Host memory refers to a temporary location where commands and data are stored. This memory is used by the host system to store instructions and data that are currently being processed. It serves as a temporary storage space for the CPU to access and manipulate the data as required. The host memory is essential for the functioning of the system as it allows for efficient execution of commands and retrieval of data during the operation of the host system.

The role of the backup server in a backup and recovery environment is to maintain the backup catalog. The backup catalog contains important information about the backed-up data, such as file names, locations, and timestamps. By maintaining the backup catalog, the backup server ensures that the data can be easily identified and restored when needed. This role is crucial for effective backup and recovery operations, as it allows for efficient management and retrieval of backed-up data.

The correct answer is SCSI over FC. This represents the layering of protocols in a Fibre Channel SAN, where the SCSI protocol is used over the Fibre Channel protocol. This means that the Fibre Channel protocol is responsible for transporting the SCSI commands and data between devices in the SAN.

To calculate the number of replica devices required, we need to consider the following information:
- The application uses ten 9 GB devices, so the total data size is 10 * 9 = 90 GB.
- Each replica will be kept for 24 hours, and a new replica is required every 4 hours.
- The data changes by 10% every 4 hours.

Since a new replica is required every 4 hours, we need to calculate the total number of replicas needed in 24 hours.
24 hours / 4 hours = 6 replicas.

Since the data changes by 10% every 4 hours, each replica will have a data size of 90 GB + (10% of 90 GB) = 99 GB.

Therefore, the total data size for 6 replicas is 6 * 99 GB = 594 GB.

To calculate the number of replica devices required, we divide the total data size by the size of each device: 594 GB / 9 GB = 66.

Hence, the correct answer is 60 (as there are only 10 devices available).

The advantage of single-mode fiber over multi-mode fiber is that it enables optical connections over longer distances. Single-mode fiber has a smaller core diameter, which allows for less dispersion and attenuation of the light signal as it travels through the fiber. This means that the signal can travel further without losing strength or quality. In contrast, multi-mode fiber has a larger core diameter, which limits the distance that the signal can travel before it degrades. Therefore, single-mode fiber is preferred for long-distance applications.

In a two-tier Core Edge fabric, nodes are typically connected with the host on the edge and storage on the core. This means that the edge nodes, which are closer to the end-user devices, will handle the host functions, while the core nodes will handle the storage functions. This configuration allows for efficient data transfer and processing, as the edge nodes can quickly handle user requests, while the core nodes can efficiently manage and store the data.

An integrated NAS device manages storage devices using NAS software, which is specifically designed for file-level access and sharing. This means that it can provide advanced features such as file-level permissions, file locking, and file versioning. On the other hand, a NAS Gateway device manages storage devices via array software, which is primarily designed for block-level access. This means that it can provide features such as RAID, volume management, and disk provisioning. Therefore, the use of NAS software is the key feature that differentiates an integrated NAS device from a NAS Gateway device.

The maximum amount of data that will be missing at site B in the event of a site failure at A is 2 hours. This is because data is being replicated from site A to site B every hour, creating consistent point in time copies. If there is a failure at site A, the replication process will be interrupted and the data from the last successful replication until the failure occurred will be missing at site B. Since the replication occurs every hour, the maximum amount of missing data will be 2 hours.

The size of the unique Content Address when the CAS stores a data object is 128 bit. This means that the CAS uses a 128-bit address to uniquely identify each data object it stores. This large address size allows for a vast number of unique addresses, which helps ensure that each data object can be accessed and retrieved accurately.

Formatting is the process that writes physical address information to a disk. This process prepares the disk to store data by creating a file system and organizing the disk into sectors and tracks. It also marks bad sectors and sets up the necessary structures for the operating system to access and manage the disk. Formatting is essential before using a new disk or when reusing an existing disk to ensure proper data storage and retrieval.

The correct answer is "No more than 4 hours of production data can be lost." This means that in the event of a disaster, the company should have measures in place to ensure that they can recover their data and resume production within 4 hours, without losing more than 4 hours worth of data. This implies that they should have backup systems and processes in place to minimize data loss and ensure business continuity.

Using multiple Inter-Switch Links (ISLs) between two Fibre Channel (FC) switches provides an advantage in terms of availability. By having multiple ISLs, it creates redundancy and ensures that if one link fails, the other links can still carry the traffic, preventing any disruption in communication between the switches. This enhances the overall availability of the network and reduces the chances of downtime or loss of connectivity.

The correct answer is 25 MB/s. This is because the network bandwidth must be able to handle the peak writes and reads in the environment. In this case, the peak writes are 50 MB/s and the peak reads are 45 MB/s. Since asynchronous remote replication will be used, the network must be able to handle both the writes and reads simultaneously. Therefore, the network bandwidth must be at least equal to the higher of the two, which is 50 MB/s.

The Control Station component of Celerra allows for the management of volumes and filesystems. It is responsible for providing a user interface and management services for the Celerra system. This includes tasks such as creating and deleting volumes, managing filesystems, and configuring storage resources. The Control Station acts as the central point for administering and monitoring the Celerra system, making it the correct answer for this question.

Asynchronous remote replication improves application performance compared to synchronous remote replication because in asynchronous replication, writes are acknowledged immediately by the source. This means that the application does not have to wait for the remote replica to acknowledge the write before proceeding, resulting in faster write performance. With synchronous replication, on the other hand, the application has to wait for the remote replica to acknowledge the write, which can introduce latency and slow down the application performance.

A Gateway NAS system solution is the most appropriate choice for introducing NAS functionality in a SAN environment. A Gateway NAS acts as a bridge between the SAN and NAS, allowing the SAN to access the NAS storage. This solution provides seamless integration between the two technologies, enabling the SAN environment to leverage the benefits of NAS, such as file-level access and simplified management. Additionally, a Gateway NAS system solution offers flexibility and scalability, as it can be easily expanded to meet growing storage needs.

The back-end in an intelligent disk system is responsible for moving data between the cache and the disks. This means that it is involved in the actual transfer of data from the storage cache to the physical disks and vice versa. It plays a crucial role in ensuring efficient data storage and retrieval, as it manages the movement of data between these two components of the system.

To ensure a consistent replica of the database, I/Os to the source devices should be held just before the creation of the replica. Holding I/Os to the source devices ensures that no new data is being written to the database during the replication process, preventing any inconsistencies or data loss. By pausing I/Os, the replica can accurately reflect the state of the database at the time of replication, maintaining data integrity.

Random, small writes will have its performance affected most by slow seek times. In this data access pattern, the system needs to locate and write to specific random locations on the storage device. Slow seek times mean that the time taken to locate these random locations will be longer, resulting in decreased performance. Additionally, small writes require frequent disk access, and slow seek times will further exacerbate the performance impact.

When a pointer based replica is created and used for decision support, the data is copied from the source to the save location for the first write to a location on the target. This means that when the first write operation occurs on the target, the data from the source is copied to the save location. This ensures that the target has the most up-to-date data for decision support purposes.

The role of the backup client in a backup and recovery environment is to gather data for backup. This means that the backup client is responsible for identifying and selecting the data that needs to be backed up from the source system. It collects this data and sends it to the backup server or storage node for further processing and storage. The backup client plays a crucial role in ensuring that all the necessary data is captured and backed up effectively, making it an essential component of the backup and recovery process.

Connectrix is the correct answer because it is an EMC product family specifically designed for the management and configuration of Fibre Channel switched fabrics. The Connectrix product family includes a range of switches and directors that provide connectivity and control for Fibre Channel networks. This allows for efficient and effective management of storage area networks (SANs) and enables the configuration of complex storage infrastructures.

Array based synchronous replication has the highest bandwidth requirements because it involves replicating data in real-time between storage arrays. This means that every write operation must be synchronized between the primary and secondary arrays, resulting in a constant flow of data over the network. On the other hand, async ordered writes, log shipping, and host-based async LVM mirroring do not require the same level of real-time synchronization and therefore have lower bandwidth requirements.

Read Ahead is a cache algorithm that minimizes the time the host waits for data to be fetched from the storage system. This algorithm predicts the data that will be needed in the future and proactively fetches it from the storage system into the cache. By doing so, it reduces the latency of retrieving data from the storage system, as the data is already available in the cache when the host requests it. This helps to improve the overall performance and responsiveness of the system.

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In the SAN Core/Edge exhibit, the HBA (Host Bus Adapter) is responsible for connecting the server to the storage network. The F port (Fabric port) is a switch port that connects to the storage devices. Looking at the options provided, the correct answer is 7 and 5, as port 7 represents the HBA and port 5 represents the F port.

MirrorView/A is a remote replication solution for EMC CLARiiON storage systems. It allows for the creation of synchronous or asynchronous copies of data between two CLARiiON arrays, providing disaster recovery and data protection capabilities. MirrorView/A ensures that data is replicated in real-time, allowing for quick failover and minimal data loss in the event of a disaster.

Log shipping over IP networks has the lowest bandwidth requirement among the given options. Log shipping involves sending transaction log backups from a primary database server to a secondary server, where they are restored and applied. This process requires minimal bandwidth because only the transaction log backups, which are typically small in size, need to be transferred over the network. In contrast, array-based synchronous replication, asynchronous ordered writes, and host-based LVM mirroring involve replicating entire data sets or making frequent updates, which can consume more bandwidth.

The data center activity responsible for maintaining an audit trail of configuration changes is security. Security measures in a data center include tracking and logging all configuration changes made to the systems and infrastructure. This audit trail helps in identifying any unauthorized or suspicious changes, ensuring accountability, and facilitating troubleshooting and compliance with regulatory requirements.

External DAS refers to Direct Attached Storage that is connected to a server or host system via a peripheral interface such as SCSI, SATA, or USB. In this context, "Array provided device management" means that the storage array is responsible for managing the devices connected to it, such as handling device configuration, monitoring, and maintenance. This is in contrast to host-provided device management, where the server or host system is responsible for managing the connected storage devices.

The correct answer is 20GB because the replica of the application needs to store the same amount of data as the original application. Since the original application uses ten 10GB devices, the replica should also allocate the same amount of storage, which is 10GB x 10 devices = 100GB. However, the data changes by 20% every 24 hours, so the replica only needs to store 80% of the original data, which is 100GB x 80% = 80GB. Therefore, the storage allocated for the replication should be 80GB, which is equivalent to 20GB.

The back-end adapter in an EMC Symmetrix Array is responsible for handling physical disk I/O operations. It connects the storage processors to the physical disks, allowing data to be read from and written to the disks. The back-end adapter is an essential component in the array's architecture, ensuring efficient and reliable disk I/O operations.

In pointer based replica technology, data is copied from the source to the save location when the first write occurs to a location on the source. This means that as soon as any data is written to a location on the source, it is immediately copied to the save location.

A RAID Group is a set of CLARiiON disks used to provide storage space to a host. RAID (Redundant Array of Independent Disks) is a technology that combines multiple physical disks into a single logical unit, providing improved performance, fault tolerance, and increased storage capacity. A RAID Group allows for data to be distributed across multiple disks, providing redundancy and ensuring that if one disk fails, the data can still be accessed from the remaining disks.

In LVM based remote replication, the queued writes on the source side exceeding the size of the dedicated log file would require a full resynchronization between the source and target. This means that all the data needs to be synchronized again from the source to the target, which can be a time-consuming process. This is because LVM (Logical Volume Manager) uses a dedicated log file to track changes and ensure consistency between the source and target volumes. When the log file becomes full, a full resynchronization is necessary to ensure data integrity.

A logical component of a storage environment is an application. Applications are responsible for generating and manipulating data that needs to be stored. They interact with the storage system to read and write data, manage storage resources, and perform various storage-related tasks. Applications can be anything from a simple file transfer program to a complex database management system. They play a crucial role in determining how data is stored, accessed, and managed within a storage environment.

The Reserved LUN Pool in EMC CLARiiON SnapView replication is a pool of LUNs that can hold COFW (Copy-on-First-Write) data. COFW is a technology used in replication to ensure that data is consistent and accurate between the source and target LUNs. By reserving a specific pool of LUNs for COFW data, the replication process can efficiently manage and track the changes made to the source LUNs before transferring them to the target LUNs. This helps to maintain data integrity and minimize the impact on performance during the replication process.

In the event of a disaster, the company must be able to resume production within 4 hours. This means that the company should have a plan and resources in place to quickly recover from the disaster and resume its normal production activities within the specified time frame. This ensures that the impact on the company's operations and productivity is minimized and that it can continue serving its customers and meeting its business objectives.

The Content Address in CAS is derived from the contents of the object. This means that the address is generated based on the actual data stored within the object, rather than any other factors such as metadata, creation time, anticipated retention time, or size in bytes.

NAS stands for Network Attached Storage, which refers to a specialized server that provides file-level data access to multiple clients over a network. Unlike a general-purpose server, NAS is designed specifically for storing and sharing files, making it an efficient and dedicated solution for file-level data access. Therefore, the answer "Specialized server for file level data access" accurately defines NAS.

Access Logix is the CLARiiON software component that controls storage visibility to hosts. It allows for the creation of logical units (LUNs) and controls the access and visibility of these LUNs to the hosts. Access Logix helps in managing and organizing the storage resources efficiently, ensuring that the hosts can access the required data without any conflicts or unauthorized access.

CIM stands for Common Information Model, which is a language and methodology used for describing management data. It provides a standardized way to define and organize information about managed resources in a networked environment. CIM allows different management systems to exchange and understand information about the resources they are managing, promoting interoperability and integration between different systems. It is commonly used in IT infrastructure management, allowing administrators to easily access and manipulate management information across multiple platforms and devices.

Replicated in storage array based remote replication refers to the process of duplicating data from a source device to a remote device. In this scenario, the correct answer is "Writes to source device." This means that any write operations performed on the source device will be replicated or copied to the remote device. This ensures that both devices have the same data and can be used for data recovery or backup purposes.

When the communication link between a mirror's primary image and its secondary image fails during EMC CLARiiON MirrorView/A remote replication, the state of the secondary image is "Fractured". This means that the secondary image is no longer synchronized with the primary image and is unable to receive updates or changes. The fracture occurs due to the interruption in communication, causing the secondary image to become out of sync and unable to mirror the primary image.

Gigabit Ethernet is the correct answer because it is a channel that allows storage arrays to be connected directly to IP networks for remote replication. Gigabit Ethernet provides high-speed data transfer rates and is commonly used for connecting storage devices to networks for remote replication purposes. It is a reliable and widely supported method for transmitting data over IP networks, making it suitable for remote replication of storage arrays.

In the task of performance management, collecting and analyzing ISL traffic metrics is important. This involves measuring and evaluating the performance of the network, including the traffic flow through ISLs (Inter-Switch Links). By analyzing these metrics, organizations can identify any bottlenecks or issues that may be affecting the performance of the network. This information can then be used to optimize the network and ensure that it is operating at its best capacity.

Tape is advantageous over disk as a backup destination device because of its portability. Unlike disks, tapes can be easily transported and stored offsite, providing an extra layer of protection against disasters or system failures. This allows for the creation of an effective disaster recovery plan, ensuring that data can be restored even in the event of a physical location being compromised. Additionally, tapes are typically more durable than disks, making them less susceptible to damage from physical mishaps or environmental factors.

When a read or write is issued for the first time to a location on the target, the data is copied from the source to the target. This means that the Copy on First Access (COFA) mechanism is triggered when there is an initial read or write operation to a specific location on the target. This ensures that the target has the most up-to-date data from the source, allowing for accurate decision support operations.

Content Address (CA) is an identifier that uniquely addresses the content of a file and not its location. This means that regardless of where the file is stored or its physical location, the CA remains the same and can be used to retrieve the file. The CA focuses solely on the content of the file, allowing for easy access and retrieval of specific files based on their unique identifiers.