Hitachi G1000 User Manual page 52

VOL's virtual LDEV ID is deleted. When the virtual LDEV ID is deleted, the
server does not recognize the volume, making it unusable as a Thin Image
volume.
Any operation that deletes the virtual LDEV ID of a volume used as a Thin
Image volume cannot be performed.
Thin Image operations and GAD status
The ability to perform a Thin Image pair operation depends on the HTI pair
status and the GAD pair status. The following tables show HTI operations and
whether they can be performed (Yes, No) with the listed GAD status. The
information assumes the required HTI status for the operation.
The Virtual LDEV ID column shows whether the volume has a virtual LDEV ID
or not (Yes, No).
Table 2-8 Thin Image operations when GAD status is Simplex
GAD pair Virtual
status LDEV ID
SMPL Yes
No
No, but
has S-VOL
reservatio
n
Table 2-9 Thin Image operations when GAD status is Mirroring
GAD
I/O
pair
mode location
status
INIT/ Mirror Primary
COPY (RL)
Block Secondar
y
COPY Mirror Primary
(RL)
Block Secondar
y
Notes:
1 Cannot be used because GAD pairs are not suspended.
.
2 Cannot be used because the data is being copied and the volume data is not fixed yet.
.
3 Cannot be used because the volume at the GAD copy destination is the same as the volume at the
.
Thin Image copy destination.
2-14
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide
I/O
Read Write
Yes Yes
No No
No No
I/O
Pair
Read Write
Yes Yes
No No
Yes Yes
No No
System requirements
Thin Image pair operation
Create Split
pairs pairs
Yes Yes
Yes Yes
No No
Thin Image pair operation
Create Split
pairs pairs
Yes Yes
No
2
No
Yes Yes
No
2
No
Resync Restore
pairs pairs
Yes Yes
Yes Yes
No No
Resync Restore
pairs pairs
Yes
1
No
2 1, 3
No No
Yes
1
No
2 1, 3
No No
Delete
pairs
Yes
Yes
Yes
Delete
pairs
Yes
Yes
Yes
Yes