Hitachi G1000 - Page 47

The Virtual LDEV ID column shows whether the volume has a virtual LDEV ID
or not (Yes, No).
Table 2-1 SI operations when GAD status is Simplex
GAD pair
status
Virtual
LDEV ID
I/O ShadowImage pair operation
Read Write
Create
pairs
Split
pairs
Resync
pairs
Restore
pairs
Delete
pairs/
Suspend
copy
SMPL Yes Yes Yes Yes Yes Yes Yes Yes
No No No Yes Yes Yes Yes Yes
No, but
has S-VOL
reservatio
n
No No No No No No Yes
Table 2-2 SI operations when GAD status is Mirroring
GAD
pair
status
I/O
mode
Pair
location
I/O ShadowImage pair operation
Read Write
Create
pairs
Split
pairs
Resync
pairs
Restore
pairs
Delete
pairs/
Suspen
d copy
INIT/
COPY
Mirror
(RL)
Primary Yes Yes Yes Yes Yes
No
1
Yes
Block Secondar
y
No No Yes
No
2
No
2
No
1, 3
Yes
COPY Mirror
(RL)
Primary Yes Yes Yes Yes Yes
No
1
Yes
Block Secondar
y
No No Yes
No
2
No
2
No
1, 3
Yes
Notes:
1. Cannot be used because GAD pairs are not suspended.
2. Cannot be used because S-VOL data is not fixed.
3. Cannot be used because the volume at the GAD copy destination is the same as the volume at the
ShadowImage copy destination.
System requirements
2-9
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide