Concurrent Use Of Dynamic Provisioning - Hitachi AMS2100 User Manual

Concurrent use of Dynamic Provisioning

DP-VOL
2-18
Hitachi AMS 2000 Family Copy-on-Write SnapShot User Guide
Observe the following items:
• When the array firmware version is less than 0893/A, the DP-
VOLs created by Dynamic Provisioning cannot be set for a P-VOL
of SnapShot. Moreover, when the array firmware version is less
than 0893/A, the DP-VOLs cannot be added to the data pool
used by SnapShot and TCE.
• Depending on the installed cache memory, Dynamic Provisioning
and SnapShot may not be unlocked at the same time. To unlock
Dynamic Provisioning and SnapShot at the same time, add
cache memories. For the capacity of the supported cache
memory, refer to
• The data pool used by SnapShot and TCE cannot be used as a
DP pool of Dynamic Provisioning. Moreover, the DP pool used by
Dynamic Provisioning cannot be used as data pools of SnapShot
and TCE.
When the array firmware version is 0893/A or more, the DP-VOLs
created by Dynamic Provisioning can be set for a P-VOL or a data
pool of SnapShot. However, the normal LU and the DP-VOL cannot
coexist in the same data pool.
The points remember when using SnapShot and Dynamic
Provisioning together are described as follows. Refer to the Hitachi
Adaptable Modular Storage Dynamic Provisioning User's Guide for
the detailed information regarding Dynamic Provisioning.
Hereinafter, the LU created in the RAID group is called a normal LU,
and the LU created in the DP pool that is created by Dynamic
Provisioning is called a DP-VOL.
• When using a DP-VOL as a DMLU, check that the free capacity
(formatted) of the DP pool to which the DP-VOL belongs is 10 GB
or more, and then set the DP-VOL as a DMLU. If the free
capacity of the DP pool is less than 10 GB, the DP-VOL cannot be
set as a DMLU.
• LU type that can be set for a P-VOL or a data pool of SnapShot
The DP-VOL created by Dynamic Provisioning can be used for a
P-VOL or a data pool of SnapShot.
of a DP-VOL and a normal LU that can be used for a P-VOL or a
data pool of SnapShot.
Table 2-3: Combination of a DP-VOL and a Normal LU
TrueCopy TrueCopy
P-VOL S-VOL
DP-VOL
Planning and design
User data area of cache
Table 2-3
1
Available. When the pair status is Split, the data
pool consumed capacity can be reduced
compared to the normal LU.
memory.
shows a combination
Contents
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