HP XP7 User Manual page 61

Items Requirements
Pool-VOLs cannot be used for any other purpose. For instance, you cannot specify the following
volumes as Thin Provisioning Z and Smart Tiers Z pool-VOLs:
Volumes used by Business Copy Z, Continuous Access Synchronous Z, or Continuous Access
Journal Z
Volumes defined by Cache Residency
Volumes already registered in Thin Provisioning Z or Smart Tiers Z pools
Volumes whose LDEV status is other than Normal or Normal (Quick Format)
You cannot specify volumes in blocked status or volumes in copying process.
Command devices
Emulation type 3390-V
RAID level for a Thin All RAID levels of pool-VOLs can be added. Pool-VOLs of RAID 5, RAID 6, RAID 1, and the
Provisioning Z pool external volume can coexist in the same pool. For pool-VOLs in the same 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.
Pool-VOLs of the same drive type with different RAID levels can coexist in the same pool.
Note that HP recommends that you use the following configuration:
◦
RAID level for a All RAID levels of pool-VOLs can be added. Pool-VOLs of RAID 5, RAID 6, RAID 1, and the
Smart Tiers Z pool external volume can coexist in the same pool.
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.
Pool-VOLs of the same drive type with different RAID levels can coexist in the same pool.
Note that HP recommends that you use the following configuration:
◦
Data drive type for a SSD*, SAS15K, SAS10K, SAS7.2K, and external volumes can be used as the data drive type.
Thin Provisioning Z These data drive types can coexist in the same pool.
pool
Cautions:
HP recommends that drives with different types do not coexist in the same pool. 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 required I/O performance
is not degraded by using less desirable drive types.
If multiple data drives coexist in the same pool, HP recommends not using data drives that
are same types and different capacity sizes.
Data drive type for a SAS15K, SAS10K, SAS7.2K, SSD*, and the external volumes can be used as the data drive
Smart Tiers Z pool type. These data drive types can coexist in the same pool.
Cautions:
If multiple data drives coexist in the same pool, HP recommends not using data drives that
are same types and different capacity sizes.
Volume capacity Internal volume: From 8 GB to 695 GB (from 9,676 cyl to 837,760 cyl).
External volume: From 8 GB to 927 GB (from 9,676 cyl to 1,1 17,760 cyl).
Set one RAID level for pool-VOLs.
If you register pool-VOLs with multiple RAID levels, the I/O performance depends on the
RAID levels of pool-VOLs to be registered. In that case, note the I/O performance of the
disks.
Set one RAID level for pool-VOLs.
If you register pool-VOLs with multiple RAID levels, the I/O performance depends on the
RAID levels of pool-VOLs to be registered. In that case, note the I/O performance of the
disks.
Thin provisioning requirements 61