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IBM XIV Storage System Technical Solutions V4 Sample Questions:

1. On XIV what factors are important to successfully implement asynchronous mirroring?

A) latency between the remote and local XIV, number of volumes must be less than 256
B) data change rate, available bandwidth and interval
C) data change rate, number of volumes less than 256, required RPO
D) each mirror must have the same RPO and sync interval within the same storage pool

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

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

3. Which of the following statements is true of the XIV architecture?

A) Storage Pools are used to group volumes with similar performance requirements.
B) For each mirrored 1 MB partition, one copy is always on an interface module.
C) In a fifteen module XIV, fifteen physical disks are allocated as hot spares.
D) Every logical volume is spread over every physical drive.

4. Which statement is true regarding XIV virtualization and the advanced snapshot mechanism?

A) A volume and its corresponding snapshots can be part of several storage pools.
B) A volume can have one snapshot only.
C) A volume's snapshot can be copied to a volume in another storage pool.
D) A volume and its corresponding snapshots can be part of several consistency groups.

5. A customer complains that their SAP database now performs worse than it did before being migrated from traditional RAID storage to XIV. The database was configured using 20 x 200GB XIV LUNs presented to an AIX 6 host OS where they are concatenated and striped into six volumes for the databases and logs. No changes have been made in the transition to XIV.
What if anything can be done to improve performance?

A) implement static load balancing and increase the queue depth of the host adapters
B) add Fibre Channel adapters to the host and balance volumes across the adapters
C) the databases should be reorganized into larger volumes on the XIV and not striped within the OS
D) the SAP volumes should be put into a QoS Performance Class

Solutions: