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Hitachi Data Systems Certified Professional - Modular storage installation Sample Questions:

1. After the removal of a failed disk drive on a Hitachi Unified Storage system, how long should you wait
before inserting a new drive?

A) more than 10 seconds
B) more than 20 seconds
C) more than 5 seconds
D) no need to wait

2. What allows firmware to be updated non-disruptively on the Hitachi Unified Storage systems?

A) Firmware updates only affect the first five drives and no controller reboot is required.
B) Host connectivity to both controllers established using multi-pathing software.
C) While one controller is rebooting, the other handles all host operations.
D) Firmware updates are performed in less than the host I/O timeout value.

3. A customer will be implementing a Hitachi Unified Storage File Module in a switch-less two-node cluster.
What needs to be used for the cluster interconnect?

A) Two1Gbps Ethernet connections with RJ-45 connectors
B) Two10Gbps Ethernet connections with XFP connectors
C) Two8Gbps FC connections with LC connectors
D) Two10Gbps Ethernet connections with LC connectors

4. Which method is used by Hitachi Unified Storage (HUS) systems to protect against loss of data in cache
should a total power failure occur?

A) The HUS uses non-volatile cache so data is always protected.
B) The battery power de-stages data in cache to on-board Flash memory.
C) The battery power de-stages data in cache to an on-board SSD drive.
D) The HUS mirrors all cache writes to on-board SSD drives.

5. A customer has identified a performance bottleneck with Online Transaction Processing (OLTP)
production host LUNs. The performance improvement plan includes a change to the Hitachi Dynamic Link
Manager load balancing algorithm which is currently set to Round Robin. Which setting would you
recommend?

A) Least I/Os
B) Extended Least blocks
C) Least blocks
D) Extended Round Robin

Solutions: