Emc 020-001 (Practice) Storage Foundations Exam By

The five core elements of the data center infrastructure are applications, databases, servers/operating systems, networks, and storage arrays. These elements are crucial components that work together to support the operation and management of the data center. Applications refer to the software programs and systems used to perform specific tasks or functions. Databases store and manage large amounts of structured data. Servers/operating systems provide the computing power and software environment for running applications. Networks facilitate communication and data transfer between various components. Storage arrays are used to store and manage data in a centralized and scalable manner.

Multi-pathing software can provide load balancing, which is the process of distributing network traffic evenly across multiple paths or links. This helps to optimize the utilization of available resources and ensures that no single path becomes overwhelmed with traffic. By distributing the workload across multiple paths, load balancing improves performance, increases fault tolerance, and enhances overall system reliability.

The key requirement of the Data Center infrastructure that addresses the concern of data on storage systems being accessible 24X7 is Availability. Availability ensures that the storage systems are always accessible and operational, allowing users to access their data at any time without any interruptions or downtime. This requirement is crucial for organizations that rely on continuous access to their data for critical operations and business continuity.

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iSNS (Internet Storage Name Service) is the service used by SCSI initiators to discover targets. iSNS is a protocol that allows devices in a storage area network (SAN) to discover and communicate with each other. It provides a centralized registry for storing and retrieving information about storage devices, including their names, addresses, and capabilities. SCSI initiators use iSNS to discover the available targets in the SAN and establish connections with them. DNS (Domain Name System) is a service used for translating domain names into IP addresses, NIS (Network Information Service) is a directory service used in UNIX-like operating systems, and WINS (Windows Internet Name Service) is a service used for name resolution in Windows networks.

Every initiator or target in an iSCSI network is assigned a unique iSCSI name. This unique identifier helps in distinguishing and addressing each initiator or target device in the network. The iSCSI name is not derived from the IP address, and both initiators and targets require an iSCSI name. Therefore, the statement that every initiator or target has a unique iSCSI name is true.

Partitioning is the process of dividing a disk into logical containers. This allows the disk to be divided into separate sections, each with its own file system, allowing for better organization and management of data. Partitioning also enables the use of multiple operating systems on a single disk, as each partition can be dedicated to a specific operating system.

Storage systems require availability to ensure that data can be accessed when needed, capacity to store large amounts of data, and scalability to accommodate future growth and increased storage needs. Compliance, maintenance, security, performance, utilization, and data integrity are also important factors in storage systems, but they are not listed as requirements in this question.

A physical component of a storage environment is a BUS. A BUS refers to a communication system that allows different components of a computer system to transfer data between each other. In the context of a storage environment, a BUS is responsible for connecting storage devices, such as hard drives or solid-state drives, to the rest of the computer system. It provides a pathway for data to be transferred to and from the storage devices, allowing the operating system and other components to access and manipulate the stored data.

When a disk is divided into multiple Logical Unit Numbers (LUNs), each LUN appears as a separate and independent disk to the host. Therefore, when one LUN is presented to the host, it appears as a single disk. The host is not aware of the other LUNs or any underlying configuration such as mirroring or RAID arrays. It simply sees and interacts with the presented LUN as if it were a standalone disk.

Clustering is a technology that supports high availability of data. It involves grouping multiple servers together to work as a single system, providing redundancy and failover capabilities. In a clustered environment, if one server fails, another server in the cluster takes over the workload, ensuring continuous availability of data. Clustering also allows for load balancing, where the workload is distributed across multiple servers to improve performance and prevent any single point of failure. Therefore, clustering is the correct answer for supporting high availability of data.

Logical volumes can be a partition of a larger physical disk. This means that a logical volume can be created by dividing a single physical disk into multiple partitions, each of which can be independently managed and accessed. This allows for more efficient and flexible utilization of storage space, as different logical volumes can have different sizes and file systems.

FC stands for Fibre Channel, which is a type of front-end port commonly found on intelligent storage systems used in a Storage Area Network (SAN). Fibre Channel is a high-speed network technology that allows for fast and reliable data transfer between servers and storage devices. It provides a scalable and flexible solution for connecting storage systems to servers in a SAN environment. ATA, EIDE, and SCSI are other types of front-end ports, but they are not typically used in SANs.

Partitioning a physical disk involves dividing it into logical containers. This allows the disk to be organized into separate sections, each with its own file system and storage space. Partitioning enables the disk to be used more efficiently by allowing different types of data to be stored in separate areas. It also allows for easier management and organization of files and data on the disk.

Scalability is the requirement of storage systems that applies to the goal of ensuring that the storage solution can grow with the business. Scalability refers to the ability of a system to handle increasing amounts of work, data, or users without compromising performance or functionality. In the context of storage systems, scalability means that the system can easily accommodate additional storage capacity as the business grows, allowing for seamless expansion without disruption or the need for significant infrastructure changes.

The front-end adapter in an EMC Symmetrix Array is responsible for providing physical connectivity to hosts. It acts as an interface between the storage processor and the host, allowing data to be transferred between them. The front-end adapter handles the communication protocols and ensures that the data is transmitted accurately and efficiently.

The high-speed interconnect between the Central Processing Unit (CPU) and memory is known as the BUS. The BUS allows for the transfer of data between the CPU and memory, enabling efficient communication and data processing. It acts as a pathway for the CPU to access and retrieve information from the memory, ensuring smooth and fast operation of the system.

A bus is a high-speed interconnect that facilitates communication and data transfer between the CPU, memory, and disks in a computer system. It acts as a pathway or channel through which information can flow between these components, enabling efficient data transfer and synchronization. The bus ensures that data can be quickly and accurately exchanged between the different parts of the system, allowing for smooth and efficient operation.

When creating a point in time replica, it is necessary to hold application I/O just before the creation to ensure a consistent copy. This is because any ongoing I/O operations during the creation process can lead to inconsistencies in the replica. By holding the application I/O, any changes made to the data will be completed, and the replica will accurately reflect the state of the application at that specific point in time.

Partitioning is the process of dividing a physical disk into logical volumes. This allows the disk to be divided into separate sections, each with its own file system and storage capacity. By partitioning a disk, it becomes easier to organize and manage data, as well as improve performance and security. Each logical volume can be treated as a separate entity, with its own file system and access controls, making it easier to allocate and manage storage space.

SAN, or Storage Area Network, provides a benefit of enabling centralized provisioning and management of storage resources. This means that administrators can easily allocate and manage storage resources from a central location, making it more efficient and convenient. This centralized approach allows for better organization and control over storage, leading to improved performance and easier troubleshooting. It also simplifies the process of adding or removing storage devices, as well as optimizing storage utilization. Overall, SAN helps streamline storage management, saving time and effort for administrators.

Reporting on storage arrays allows organizations to monitor and analyze their storage capacity usage over time. This information is crucial for planning and forecasting future storage needs, ensuring that the organization has enough storage space to accommodate its data growth. By tracking storage capacity, organizations can identify potential bottlenecks, optimize storage resources, and make informed decisions about when to upgrade or expand their storage infrastructure. This helps prevent unexpected storage shortages or overprovisioning, ultimately improving the overall efficiency and cost-effectiveness of the storage environment.

The failure of the Control Station does not impact data access in this scenario because the Data Movers are configured as Primary/Primary. This means that both Data Movers are actively servicing NAS clients and can continue to do so even if the Control Station fails. The Data Movers do not need to reboot or reconfigure to maintain data access. Therefore, there is no impact on data access.

The iSCSI protocol is a storage networking standard that allows SCSI commands to be sent over an IP network. It enables the use of IP networks to connect storage devices, such as disk arrays, to servers. This allows for the consolidation and centralization of storage resources, making it easier to manage and allocate storage in a networked environment. By using the iSCSI protocol, organizations can leverage their existing IP infrastructure to access and utilize storage resources efficiently.

A benefit of a NAS solution is that it enables the ability to share data across platforms. This means that data can be accessed and shared by different devices and operating systems, allowing for seamless collaboration and increased productivity. This is particularly useful in environments where there are multiple devices and platforms in use, as it eliminates the need for data transfer or conversion between different systems.

JBOD (Just a Bunch Of Disks) is a storage configuration where multiple disks are combined into a single logical unit. One disadvantage of JBOD compared to disk arrays is that data is unprotected. In a JBOD setup, there is no redundancy or fault tolerance, meaning that if one disk fails, all the data stored on that disk will be lost. In contrast, disk arrays typically use RAID configurations to provide data protection by replicating data across multiple disks.

The magnetic disk is the most accessible storage method among the options given. This is because magnetic disks, such as hard disk drives (HDDs), provide fast and direct access to data. They have a low latency and high data transfer rate, allowing for quick retrieval and processing of information. Additionally, magnetic disks offer random access, meaning that data can be accessed in any order without the need to sequentially read through the entire storage medium. This makes magnetic disks highly efficient and suitable for applications that require frequent and immediate access to data.

In order for a client initiated restore to take place, the backup catalogs must be available. This is because the backup catalogs contain the necessary information about the backed up data, such as the location and timestamps. Without access to the backup catalogs, the client would not be able to identify and retrieve the specific data they want to restore.

iSCSI is the correct answer because it is a protocol that allows a host to access block level storage over IP. iSCSI stands for Internet Small Computer System Interface and it enables the transmission of SCSI commands over IP networks. This protocol is commonly used in storage area networks (SANs) to connect servers to storage devices, providing a way for the host to access and manage block-level storage remotely.

An intelligent storage system consists of four components: back-end, cache, front-end, and physical disks. The back-end is responsible for handling the communication between the storage system and the host system. The cache component stores frequently accessed data to improve performance. The front-end is responsible for handling the communication between the storage system and the client system. Lastly, the physical disks are the actual storage devices where the data is stored.

A valid member of a zone in a Storage Area Network (SAN) is a Host Bus Adapter (HBA) World Wide Port Name (WWPN). In a SAN, a zone is a logical grouping of devices that are allowed to communicate with each other. The HBA WWPN is a unique identifier assigned to each HBA in a SAN, and it is used to establish connections and control access between devices within a zone. Therefore, a valid member of a zone in a SAN would be an HBA WWPN.

Synchronous replication requires a continuous and consistent connection between the two sites in order to replicate data in real-time. However, since site A and site B are 1000 miles (1600 km) away, it is not feasible to maintain a stable and low-latency connection over such a long distance. Therefore, synchronous replication is not suitable for remotely replicating data from site A to site B in this scenario.

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In disaster recovery planning for a backup and recovery environment, the catalog is a crucial component that must be included. The catalog contains metadata about the backup data, such as file names, locations, and timestamps. It helps in tracking and managing the backup data, allowing for efficient and accurate recovery in case of a disaster. Without the catalog, it would be challenging to identify and restore the necessary backup data, making the disaster recovery process more time-consuming and prone to errors.

E_Ports are the physical ports that interconnect two FC switches. These ports are used for establishing an inter-switch link (ISL) between the switches. ISLs allow for communication and data transfer between the switches, enabling the creation of larger storage networks. E_Ports are typically used in Fibre Channel (FC) SAN environments and provide high-speed connectivity between switches.

A logical component of a storage environment is the FileSystem. A FileSystem is responsible for organizing and managing the storage of data on a disk. It provides a structured way to store, retrieve, and manage files and directories. It determines how data is stored, accessed, and organized on the storage device. The FileSystem ensures that data is stored in a logical and efficient manner, allowing for easy retrieval and manipulation of files and folders.

A Domain ID identifies a switch within a fabric. In a fabric network, multiple switches are connected together to form a unified network. Each switch is assigned a unique Domain ID, which helps in identifying and addressing the switch within the fabric. The Domain ID allows for efficient communication and management of the switches within the fabric network.

Fiber Channel Arbitrated Loop represents a common implementation of a storage network with limited scalability. In this network architecture, devices are connected in a loop, and data is transmitted in a sequential manner. However, only one device can transmit data at a time, causing potential bottlenecks and limited scalability. This is in contrast to Switched Fabric, where devices are connected to a central switch, allowing for simultaneous data transmission and greater scalability.

In a CAS (Content Addressable Storage) implementation, the basic unit of storage is an object. CAS is a data storage architecture that stores and retrieves data based on its content rather than its location. In this system, each object is assigned a unique identifier based on its content, and this identifier is used to retrieve the object when needed. Therefore, an object is the fundamental unit of storage in a CAS implementation.

A cache dirty bit flag is a marker that indicates whether the data in the cache has been modified since it was last written to disk. In this case, the correct answer is "Changed data not yet written to disk." This means that the data in the cache has been modified, but those changes have not been saved to the disk yet.

Synchronous remote replication is a method of replicating data in real-time to a remote location. However, one disadvantage of this method is that it can cause response time elongation. This means that the time it takes for a system to respond to a request or command may increase, leading to slower performance. This can be a drawback compared to other methods of remote replication that may not have this issue.

RAID (Redundant Array of Independent Disks) is a data storage technology that protects against disk loss. It achieves this by distributing data across multiple disks, so that if one disk fails, the data can still be accessed from the remaining disks. RAID provides fault tolerance and data redundancy, ensuring that data is not lost in the event of a disk failure. Therefore, it protects against the failure of individual disks within a storage system.

Array based local replication technologies track changes made to source and target devices after the creation of a replica to enable faster re-synchronization. By tracking these changes, the replication technology can identify and replicate only the modified data, rather than replicating the entire dataset. This significantly reduces the time and resources required for re-synchronization, allowing for quicker recovery and minimizing downtime.

Fabric manager is the correct answer because it is a tool specifically designed to view the logical and physical topology of a SAN (Storage Area Network) in an MDS (Multilayer Director Switch) environment. It provides a comprehensive overview of the SAN infrastructure, including the connections between switches, the storage devices, and the hosts. With fabric manager, administrators can easily monitor and manage the SAN, troubleshoot issues, and optimize performance. Device manager, EWS, and switch manager are not specifically tailored for viewing the topology of an MDS SAN, making them incorrect choices.

The control of the loop is determined by the node with the highest priority. In this scenario, when multiple FCAL nodes are attempting to send I/O to a storage array simultaneously, the node with the highest priority will have control over the loop. This means that it will have the authority to send its I/O requests first, while the other nodes will have to wait for their turn based on their priority levels.

A Storage Area Network (SAN) is the best solution for consolidating a storage environment that requires high bandwidth and block level I/O. SANs are specifically designed to provide fast and efficient data transfer between servers and storage devices, making them ideal for applications that require high performance and low latency. CAS (Content Addressable Storage) is primarily used for data archiving and retrieval, DAS (Direct Attached Storage) is a simple storage solution directly connected to a single server, and NAS (Network Attached Storage) is optimized for file-level access over a network. None of these options are as suitable as SAN for the given requirements.

Multi-mode fiber has a disadvantage of limited distances compared to single-mode fiber. This means that the maximum distance over which data can be transmitted using multi-mode fiber is shorter than that of single-mode fiber. This limitation can be a drawback in situations where long-distance communication is required.

The correct answer is greater connectivity capacity. A FC director is a high-end Fibre Channel switch that is designed to handle large amounts of data traffic and provide high-performance connectivity. It typically has more ports and higher bandwidth compared to a FC switch, allowing for greater connectivity capacity. Dual-redundant power supplies, support for both LC and SC optical connectors, and more options for SAN management software are features that can be found in both FC directors and FC switches, but they do not specifically distinguish one from the other.

The correct answer is "No more than 2 hours of production data can be lost." This means that in the event of a disaster, the company's Recovery Point Objective (RPO) is 2 hours, indicating that they cannot afford to lose more than 2 hours' worth of production data. This suggests that the company has implemented backup and recovery measures to ensure that data is regularly backed up and can be restored in a timely manner in case of a disaster.

CAS stands for Content Addressable Storage, which is a technology specifically designed for the storage of fixed content data. CAS uses a unique identifier or address to store and retrieve data, making it ideal for storing data that does not change frequently or at all. This technology ensures data integrity and immutability, making it suitable for compliance and regulatory requirements. Unlike other storage technologies like DAS, NAS, and SAN, CAS provides a secure and efficient way to store and manage fixed content data.

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.