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Hitachi Data Systems Certified Professional - Modular storage installation Sample Questions:
1. 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 blocks
B) Least I/Os
C) Extended Round Robin
D) Extended Least blocks
2. What are two characteristics of the Hitachi Unified Storage (HUS) controllers? (Choose two.)
A) The FC front-end ports automatically sense 1, 2, 4 and 8 Gbps.
B) The FC front-end ports offer improved sequential I/O performance.
C) HUS models 110 and 130 are active/passive.
D) Mixing FC and iSCSI front-end ports is allowed on all models.
3. You have just installed Hitachi Dynamic Link Manager on a Solaris server. What is the purpose of issuing
the "dlnkmgr view -sys" command?
A) It displays the primary path.
B) It configures the alternate path.
C) It displays the configuration.
D) It displays the alternate path.
4. A Hitachi Unified Storage system is connected to a Solaris server. If you want to optimize performance for
the host I/Os, how do you determine the appropriate queue depth value?
A) Using the Host installation guide for Fibre Channel.
B) The value is set according to the results of the initial SCSI inquiry.
C) Set queue depth to 1.
D) Use the operating system default value.
5. What is the correct procedure to replace a suspected SAS interface cable connected to the last drive box
(DBL) of a Hitachi Unified Storage system?
A) Using the WEB tool, disable the suspected SAS link, replace the cable and enable the SAS link.
B) Using SNM2, disable the suspected SAS link, replace the cable and enable the SAS link.
C) Replace the suspected SAS interface cable by a new one.
D) Slide out the I/O module from the DBL, replace the cable and slide the I/O module back in.
Solutions:
Question # 1 Answer: B | Question # 2 Answer: B,D | Question # 3 Answer: C | Question # 4 Answer: A | Question # 5 Answer: D |