Snapshot Specifications - Hitachi AMS2100 User Manual
Ams 2000 family copy-on-write snapshot
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Also See for AMS2100:
- Getting started manual (54 pages) ,
- Hardware manual (306 pages) ,
- Service manual (192 pages)
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SnapShot specifications
Table A-1 lists external specifications for SnapShot.
•
Table A-1: General Specifications
AMS model
Host interface
Number of pairs
Cache Memory
Command devices
Differential Management LU
(DMLU)
Unit of pair management
Number of V-VOLs per P-VOL
RAID level
Combination of RAID levels
LU size
Drive types for the P-VOL and
data pool
Consistency Group (CTG)
number
A–2
Hitachi AMS 2000 Family Copy-on-Write SnapShot User Guide
Item
AMS2100/AMS2300/AMS2500
(For dual configuration only.)
Fibre channel or iSCSI.
•
AMS2300/AMS2500: 2,046 maximum
•
AMS2100: 1,022 maximum
Note: When a P-VOL is paired with 32 S-VOLs, the
number of pairs is 32.
AMS2500: 8, 16 GB per controller
AMS2300: 4, 8 GB per controller
AMS2100: 2, 4 GB per controller
Required for CCI.
•
Maximum: 128 per array
•
Volume size: 33MB or greater
•
Minimum size: 10 GB
•
One DMLU is required, two (maximum) are
recommended. When using two, each must be:
-
-
Volumes are the target of SnapShot pairs, and are
managed per logical unit.
1:32
RAID 1+0 (2D+2D to 8D+8D)
RAID 5 (2D+1P to 15D+1P)
RAID 6 (2D+2P to 28D+2P)
RAID 1 (1D+1D)
All combinations are supported between LUs for the P-
VOL and POOL. The number of data disks may be
different.
The LU size of the P-VOL must be equal in size to the
V-VOL. The max LU size is 128 TB.
If the drive types are supported by the array, they can
be set for the P-VOL and data pool. SAS drives,
SAS7.2K drives, SSD drives, or the SAS (SED) drives
are recommended. A DP-VOL cannot be a P-VOL.
•
Up to 256 consistency groups allowed per array.
•
AMS2300/AMS2500: 2,046 pairs per CTG
(maximum)
•
AMS2100: 1,022 pairs per CTG (maximum)
Specifications
Specification
In different RAID groups than the other
Under different controller than the other
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