Fast snap data pool requirements, Fast snap data pool – HP XP7 Storage User Manual
Page 30
Requirement
Item
To maintain performance levels, use the following configurations:
•
Place normal volumes and pool-VOLs in separate parity groups (see
licensed capacity requirements” (page 27)
).
•
Ensure that pool-VOLs consist of LDEVs from more than one parity group.
You cannot specify the following volumes as FS pool-VOLs:
•
Volumes that have a volume status other than “Normal” or “Normal (Quick Format)”.
Note: While you are blocking or copying a volume, you cannot specify the volume.
•
Volumes that are already being used as FS P-VOL or S-VOLs.
•
Volumes that are already contained in FS, THP, or Smart pools.
•
Volumes used as migration plans or pair volumes for another product.
•
Volumes for which you have used the Data Retention to set Read Only, Protect, or
S-VOL Disable attributes.
•
Cache Residency volumes.
•
Command device volumes.
Note: The following restrictions apply to volumes used in the same data pool.
•
Volumes must be in the same resource group.
•
External pool-VOLs must have the same cache mode, either enabled or disabled.
•
When using both internal and external volumes, the external volumes must have
cache mode enabled.
OPEN-V
Emulation type
All RAID levels are supported. However, you cannot contain pool-VOLs of different
RAID levels in the same pool.
RAID level
You can use SAS and SSD.
Data drive type
If you use internal and external volumes, you can use pool-VOLs with different drive
types in the same pool. For best performance, use pool-VOLs with the same drive type
in the same pool.
For more information about data drive type, see
“Pool creation and data drive type
Registering pool-VOLs to Cache Logical Partition Numbers (CLPRs) in pools: You can
register pool-VOLs assigned to different CLPRs in a pool (see
).
CLPR
Changing CLPRs: You can change CLPRs in the parity group belonging to the pool-VOL.
In this case, regardless of the CLPR in the pool-VOL, the CLPR number in the parity
must be the same as that of the P-VOL that you are using (see
).
1,024
Pool limit
8 GB to 4 TB
Volume capacity
Define only needed paths to a volume so that you can specify the volume as a pool-VOL.
Path definition
Fast Snap data pool requirements
The following table lists the requirements for FS data pools.
Requirement
Item
Calculate the pool capacity (see
“Calculating and assigning pool capacity”
).
Pool capacity
1,024
Pool-VOL limit per pool
30
Planning and design requirements