Hitachi AMS2100 User Manual page 147

Table A-1: General Specifications (Continued)
Item
Data pools
Max supported capacity of P-
VOL and data pool
Access to data pool LUs from a
host
Expansion of data pool
capacity
Reduction of data pool
capacity
Unifying, growing and
shrinking of an LU assigned to
a data pool
Formatting, deleting, growing,
shrinking of an LU in a pair:
Deleting RAID group in a pair:
Pairing with an expanded
volume
Formatting or expanding
V-VOL
Pairing with unified LU
Deletion of the V-VOL
Swap V-VOL for P-VOL
Load balancing
Restriction during RAID group
expansion
Hitachi AMS 2000 Family Copy-on-Write SnapShot User Guide
• Maximum of 128 LUs per array can be used for
data pools.
• A data pool must be on the same controller as the
P-VOL(s)
• Unified LUs can be assigned as a data pool only
when array firmware version is 0852/A or higher
• Maximum of 64 data pools per array (data pool
number is 0 to 63);
• Up to 64 LUs can be set for one data pool.
• The normal LU and the DP-VOL cannot coexist in
the same data pool. When you specify the DP-
VOL as a data pool, a data pool usage does not
equal to a data pool usage.
The supported capacity of SnapShot is limited based
on P-VOL and data pool size. For details, see
Requirements and recommendations for SnapShot
Logical Units on page
Data pool volumes are not recognizable from the host.
Data pool capacity can be expanded by adding LUs.
Possible only when all the pairs that use the data pool
have been deleted.
No.
No.
Only P-VOL can be expanded
No.
When the array firmware version is less than 0852/A,
the capacity of each LU before the unification must be
1 GB or larger.
Only possible when P-VOL and V-VOL are in simplex
status and not paired.
No.
The P-VOL and LU set in the data pool are out of the
target of load balancing. Also, the Loadbalancing
feature does not apply to a ShadowImage pair that is
cascaded with a SnapShot pair.
A RAID group with a SnapShot P-VOL or V-VOL can be
expanded only when the pair status is Simplex or
Paired.
Specifications
Specification
2-10.
A–3