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IBM XIV Storage System Technical Solutions V4 Sample Questions:

1. A TELCO customer has an application that generates intensive small block random reads. The customer installed one XIV Gen3 system and is dissatisfied with this choice. They have enough performance on writes and sufficient capacity.
In order to consolidate more applications what should the technical specialist advise?

A) orderthe SSD option and use itin conjunction with Q0S
B) use external storage with FC drives and virtualize it under XIV
C) order an extra frame with SAS 15k drives
D) request IBM to change the nearline SAS drives with SAS 10k drives

2. An XIV snapshot is taken daily from the same volume and kept for one week.
If it is Friday and the system is restored from a snapshot taken on Tuesday, why is it possible to return to a snapshot taken on Thursday?

A) because there are no dependencies between subsequent snapshots
B) because the deletion priorityis set correctly
C) because there is sufficient space in the snapshot reserve
D) because snapshots were all converted to full copy

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

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

4. How does the XIV system protect data arriving from hosts?

A) data is written to a single module before acknowledgement to the host
B) each module internally mirrors its cache to a special segment of memory
C) MPIO distributes a single I/O down multiple paths to different XIV modules
D) all data is written to cache in two modules and then acknowledged to the host

5. XIV hardware architecture optimizes the usage of snapshots by:

A) limiting the total number of snapshots to a maximum of 128 active pairs
B) a redirect-on-write operation using all drives in any snapshot process
C) copying data on write so the production drives are not over stressed
D) offering the possibility to isolate the drives used for snapshot target space

Solutions: