QUESTION: 25

Relocation cycles are regulatory failing to complete in an HDT implementation where the customer is also reporting lower than expected performance.

What should be done in this scenario?

Change to Continuous mode and increase the monitor period cycle time.
Change to Period mode and increase the monitor period cycle time.
Change to Period mode and reduce the monitor period cycle time.
Change to High-Performance mode and reduce the monitor period cycle time.

Answer(s): B

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When testing an external LUN with default mapping on two paths, performance appears constrained and the utilization of the RAID group in the external storage system never exceeds 35% busy no matter how many test threads are generated. You want to increase the utilization of the external RAID group.

Which two actions will accomplish this task? (Choose two.)

Increase the external path LUN queue depth setting.
Increase the number of LUNs mapped from the external RAID group.
Change Cache Mode to “Disabled”.
Increase the server HBA LUN queue depth to 64.

Answer(s): A,C

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QUESTION: 27

A user with a diskless VSP G800 uses ShadowImage from the G800 with a virtualized VSP G200 system. Application performance suffers during the frequent ShadowImage resynchronization operations.

What should be done to reduce the impact of the ShadowImage throughput in this scenario?

Configure both sets of disks into an HDT pool and let the HDT scheme manage the different workloads.
Define the ShadowImage target volumes to use dedicated external FC paths using dedicated RAID groups.
Set Copy to 15.
Increase the VSP G800 cache size to improve the application cache hit rates.

Answer(s): A

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QUESTION: 28

Which three statements are true regarding the Hitachi external storage architecture? (Choose three.)

Enabling Cache Mode increases exposure to problems with high Cache Write Pending.
Enabling Cache Mode allows destaging asynchronously from host I/O.
Enabling Cache Mode always improves performance.
A System Option mode can force in sequence destaging even when destaging asynchronously.
Disabling Cache Mode for an external LDEV eliminates the use of cache.

Answer(s): A,B,D

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QUESTION: 25

QUESTION: 26

QUESTION: 27

QUESTION: 28