Hitachi G1000 - Page 53

Table 2-10 Thin Image operations when GAD status is Mirrored
GAD
pair
status
I/O
mode
Pair
location
I/O Thin Image pair operation
Read Write
Create
pairs
Split
pairs
Resync
pairs
Restore
pairs
Delete
pairs
PAIR Mirror
(RL)
Primary Yes Yes Yes Yes Yes No* Yes
Secondar
y
Yes Yes Yes Yes Yes No* Yes
* Cannot be used because GAD pairs are not suspended, and also because the volume at the GAD copy
destination is the same as the volume at the Thin Image copy destination.
Table 2-11 Thin Image operations when GAD status is Suspended
GAD
pair
status
I/O
mode
Pair
location
I/O Thin Image pair operation
Read Write
Create
pairs
Split
pairs
Resync
pairs
Restore
pairs
Delete
pairs
PSUS Local Primary Yes Yes Yes Yes Yes Yes Yes
Block Primary No No Yes Yes Yes No Yes
PSUE Local Primary Yes Yes Yes Yes Yes Yes Yes
Block Primary No No Yes Yes Yes No Yes
Secondar
y
No No Yes Yes Yes No Yes
SSUS Block Secondar
y
No No Yes Yes Yes No Yes
SSWS Local Secondar
y
Yes Yes Yes Yes Yes No Yes
Table 2-12 Thin Image operations when GAD status is Blocked
GAD
pair
status
I/O
mode
Pair
location
I/O Thin Image pair operation
Read Write
Create
pairs
Split
pairs
Resync
pairs
Restore
pairs
Delete
pairs
PSUE Block Primary No No Yes Yes Yes No Yes
Secondar
y
No No Yes Yes Yes No Yes
Related topics
•
Thin Image on page 2-12
System requirements
2-15
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide