A VSP customer wants to optimize their multi-pathing environment and improve I/O performance.
Which two Hitachi Dynamic Link Manager (HDLM) features will assist this customer?
(Choose two.)
Response:

• A. HDLM provides multiple load-balancing algorithms to balance I/Os across available paths.
• B. HDLM spreads I/O workloads across available paths to ensure that no single path becomes overworked or under-utilized.
• C. HDLM analyzes I/O profiles and determines the most appropriate buffering policy.
• D. The HDLM server monitors the client hosts' multi-pathing agents and redistributes I/Os so no single path becomes overworked orunder-utilized.

Which two Hitachi Dynamic Link Manager (HDLM) features address challenges associated with high availability and single point failures?
(Choose two.)
Response:

• A. HDLM monitors the paths of multiple hosts and redirects I/Os to the least busy path if a path fails.
• B. HDLM can automatically set a failed path back online if it becomes available.
• C. HDLM provides failover protection by switching to a good path if a path fails.
• D. HDLM provides error correction algorithms that help recover data transmission errors caused by path failures.

You want to create a Hitachi Dynamic Provisioning pool on a VSP using Hitachi Device Manager. Which two conditions apply?
(Choose two.)
Response:

• A. Parity groups must be selected.
• B. The maximum pool number cannot exceed 127.
• C. LDEVs must be selected.
• D. Drive types cannot be mixed.

Which three Hitachi storage systems would be used to virtualize external storage?
(Choose three.)
Response:

• A. 9900V
• B. VSP
• C. USP V
• D. USP
• E. HUS

You are configuring external storage with Hitachi Device Manager on a VSP. What happens when you set the Cache Mode parameter to Enable?
Response:

• A. The VSP will always use its cache for every operation.
• B. The VSP will always use the cache in the remote storage system for every operation.
• C. After receiving the data into its cache memory,the VSP signals the host that an I/O operation has completed only after it has synchronously written the data to the external storage system.
• D. After receiving the data into its cache memory,the VSP signals the host that an I/O operation has completed and then asynchronously destages the data to the external storage system.