General Specifications - Hitachi MK-97DF8018-00 User Manual

General Specifications

Table B-1
•
Table B-1: General Specifications
Simple Modular Storage
model
Host interface
Number of pairs
Command devices
Unit of pair management
Pair structure (number of V-
VOLs per P-VOL)
RAID level
Combination of RAID levels
Volume size
Consistency Group (CTG)
number
Data pools
Differential Management LU
(DM-LU)
Max supported capacity of P-
VOL and data pool
Access to the volumes for data
pool from a host
Expansion of data pool
capacity
B–2
Hitachi Simple Modular Storage Copy-on-Write SnapShot User's Guide
lists external specifications for SnapShot.
Item
SMS100 (For dual configuration only.)
iSCSI
SMS100: 510 (maximum)
Up to 128 per disk subsystem can be set.
The command device volume size must be
greater than or equal to 33 MB.
Volumes are the target of SnapShot pairs,
and are managed per logical unit.
1:32
P-VOL: RAID 6 S-VOL: RAID 6
Not applicable.
Make the volume size of the P-VOL the
same as or larger than that of the data
pool. (The data pool in this case means a
single data pool capacity used by a single
V-VOL.)
Up to 256 consistency groups allowed per
array. Applies to SnapShot if used by itself
or concurrently with ShadowImage.
For SMS100, up to 510 pairs can be
assigned to a consistency group.
Maximum of 64 data pools/controller (data
pool number is 0 to 63); Up to 64 volumes
can be set for one data pool. Up to 128
volumes per subsystem can be set for data
pools. Unified volume can't be set for data
pool.
Exclusive volume used for storing
SnapShot information when the array
system is powered down. The DM-LU is set
at the factory at 10 GB
The supported capacity of SnapShot has
limitations based on P-VOL and data pool
size. For details, see
Maximum Capacity on page 2-9
Data pool volumes are not recognizable
from the host.
Data pool capacity can be expanded by
adding volumes. The data pool can be
expanded while the P-VOL and V-VOL
exist.
SnapShot Specifications
Specification
Calculating
.