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IBM C4090-456 Exam Syllabus Topics:

IBM XIV Storage System Technical Solutions V4 Sample Questions:

1. How does IBM XIV SSD technology provide longer life over competitors' use of SSD technology?

A) patented wear-leveling algorithm designed for SSD longevity
B) hybrid algorithms combine features of SSDswith existing HDDsin the same unit
C) IBM SSDs are filled with write blocks of 1024kb in random I/O operations
D) common off-the-shelf components minimize the use of SSDs for write environments

2. Which of the following occurs in the event of an SSD failure in an XIV system?

A) The module containing the failed SSD is phased out and all data is redistributed to the remaining modules.
B) The extended read cache workload of the module with the failed SSD is redistributed to the remaining modules.
C) All cached write data on the SSD is destaged to disks and SSD caching is disabled until the failed SSD is replaced.
D) The failed SSD's contents are rebuilt onto the hot spare SSD in the maintenance module.

3. A customer reports performance problems on an XIV Gen3 system. After further analysis of performance statistics, it appears that latency is high for reads but writes are acceptable. I/O size is generally small, with more writes than reads. Which option is likely to help the situation?

A) install ECoE adapters in the host
B) installSSDsintheXIVsystem
C) implementvolume striping on the host
D) enable IBM Easy Tier on the volumes

4. What is the fastest way to see which volume is receiving the most IOPS on the XIV?

A) open XIV GUI and select the first 12 volumes, and then next 12 and so on
B) run XCLI command xcii volume_max_iops_list
C) opentheXIV GUI and checkthe volume view
D) openXIVTopinthedefaultview

5. What is a benefit to IBM's XIV SSD transparent read cache?

A) SSD drives add usablecapacitywithout user intervention
B) performance improvement in sequential reads
C) real-time cache algorithm; not policy-based
D) SSD read cache is a separate tier

Solutions: