HP P9000 Provisioning for Mainframe Systems User Guide (AV400-96369, October 2011)

RequirementsItems
For pool-VOLs in a pool:
• RAID 6 is the recommended RAID level for pool-VOLs, especially for a pool where the recovery
time of a pool failure due to a drive failure is not acceptable.
• For pool-VOLs where the same drive type is defined, pool-VOLs of different RAID levels cannot
coexist in a pool.
SAS 15K, SAS 10K, SAS 7.2K, SATA-W/V, SATA-E, and SSD can be used as drive types.Drive type for a Thin
Provisioning Z pool
Up to three different drive types of pool-VOLs can be registered in the same pool.
• Internal volume pool-VOLs: Pool-VOLs registered in a pool can have up to three different
drive types.
• External volume pool-VOLs: Can be intermixed in the same pool if drive types are different.
Cautions:
• If multiple pool-VOLs with different drive types are registered in the same pool, the I/O
performance depends on the drive type of the pool-VOL to which the page is assigned.
Therefore, if different drive types are registered in the same pool, ensure that the I/O
performance is the same for each drive.
Internal volume: From 8 GB to 695 GB (from 9,633 cyl to 837,760 cyl).Volume capacity
External volume: From 8 GB to 927 GB (from 9,633 cyl to 1,117,760 cyl).
A volume whose capacity is less than 8GB (9,633 cylinders) cannot be registered into pools.
You must format the LDEV before the volume is registered in a pool. You cannot format an LDEV
once it is a pool-VOL.
LDEV format
THP V-VOL requirements
RequirementsItems
THP V-VOL.Volume type
The LDEV number is handled in the same way as for normal volumes.
3390-AEmulation type
Up to 63,232 per pool.Maximum number of
THP V-VOLs
Up to 63,232 volume groups per system.
Volume capacity from 1 cyl to 262,668 cyl per volume.Volume capacity
Available (Quick Format is not available.)LDEV format
When you format a THP V-VOL, the pages are released and returned to the pool as free pages.
Requirements for increasing THP V-VOL capacity
You can increase THP V-VOL capacity up to 262,668 cylinders.
The following requirements are important when increasing the THP V-VOL capacity:
• The THP V-VOL to be increased is not shared with a P9500 product that does not allow
increasing the THP V-VOL (See (page 50)).
• The THP V-VOL is not undergoing LDEV formatting.
48 Configuring thin provisioning