Thin provisioning – HP XP P9500 Storage User Manual
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The following tables show Cnt Ac-S volumes and status with the Data Retention operations that can
be performed using Remote Web Console and RAID Manager.
Data Ret operation
PAIR
status
Cnt Ac-S
Volume
Referring
access
attribute
Changing access attribute
S-VOL
Disable
Protect
Read Only
Read/Write
Yes
Yes
Yes
Yes
Yes
SMPL
P-VOL
Yes
Yes
Yes
Yes
Yes
COPY
Yes
Yes
Yes
Yes
Yes
PAIR
Yes
Yes
Yes
Yes
Yes
PSUS
Yes
Yes
Yes
Yes
Yes
PSUE
Yes
Yes
Yes
Yes
Yes
SMPL
S-VOL
Yes
No
Yes
Yes
Yes
COPY
Yes
No
Yes
Yes
Yes
PAIR
Yes
Yes
Yes
Yes
Yes
PSUS
Yes
Yes
Yes
Yes
Yes
PSUE
Thin Provisioning
Thin Provisioning virtual volumes (THP V-VOLs) can be assigned to both the Cnt Ac-S P-VOL and
S-VOL, or to one of them. However, the following restrictions apply:
•
You can use THP V-VOLs that are also used in a Business Copy pair, or in a Auto LUN migration
plan. Before creating the Cnt Ac-S pair, delete the Business Copy pair, or disable the Auto
LUN setting. After the pair is created, then re-create the pair or migration plan.
•
When a THP V-VOL has pages allocated to an S-VOL, used pool capacity is temporarily larger
than the actual capacity because pages must be reallocated in the THP V-VOL. Therefore,
before creating the pair, make sure of the following:
◦
THP V-VOL pool capacity is sufficient.
◦
Pool-VOLs that are added to a pool are not blocked. If Pool-VOLs are blocked, restore
the volume status and then create the pair.
•
Regarding page and license capacity:
◦
If a pair does not include a THP V-VOL, volume capacity is counted toward Cnt Ac-S
license capacity.
If a pair includes a THP V-VOL, only the allocated page capacity of volume capacity is
counted toward Cnt Ac-S license capacity.
If a THP V-VOL and a non-THP V-VOL are included in a pair, the page capacity and/or
license capacity counted in the P-VOL and the S-VOL may be different. This applies even
when both P-VOL and S-VOL include THP V-VOLs, because the page capacity of the P-VOL
or the S-VOL changes by a relocated pool or released page or other action.
For more information, see the HP XP P9000 Provisioning for Open Systems User Guide.
Thin Provisioning
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