Snapshot Support Matrix; Sum Of Snapshot Related Volumes - NEC M310 Configuration Manual

5. Functions <Data Replication/Snapshot (2)>
(2) Snapshot
When using Snapshot (only), the maximum capacity of snapshot related volumes is as follows.
Model Total capacity of
M110 ~ Max. Capacity
M310 ~ Max. Capacity

■ Snapshot Support Matrix

Model
8Gb FC Host I/F
16Gb FC Host I/F
1Gb iSCSI Host I/F
10Gb iSCSI(Copper) Host I/F
10Gb iSCSI (Optical)Host I/F
12Gb SAS Host I/F
Single Controller
Dual Controller
NEC StorageManager Express(Embedded)
NEC StorageManager

Sum of Snapshot Related Volumes

= Master Volume Capacity + Snapshot Volume Capacity + Snapshot Reserved Area Capacity
<Calculation Example>
Master Volume 2TB has 8 generations of snapshot volumes and the snapshot reserved area per generation is
20%.
Snapshot Reserved Area = 2TB x 20% x 8 = 3.2TB
Sum of Snapshot Related Volumes = 2TB + 16TB + 3.2TB = 21.2TB
Master
2TB
8 generations
dynamic pool
Snapshot
#1
Snapshot
2TB
2TB
Max. size of LD for
snapshot
10TB
10TB
Snapshot （DynamicSnapVolume）
16TB
Differentia
#2
l Data
Snapshot
#3
2TB
Snapshot
#8
2TB
NEC Confidential
Sum of snapshot Max. generation
related volumes
160TB
160TB
○：Supported －：Not supported
M110
○
○
○
○
○
○
-
○
○
○
3.2T
B
Snapshot
Reserved
Area
Updated
Differential
of snapshots
16
16
M310
○
○
○
○
○
-
-
○
-
○
71