The ability to perform a Thin Image Advanced pair operation depends on the TIA pair status and the GAD pair status. For details, see the Thin Image Advanced User Guide for VSP One Block.
The following tables show TIA operations and whether they can be performed (Yes, No) with the listed GAD status. The information assumes the required TIA status for the operation.
The Virtual LDEV ID column shows whether the volume has a virtual LDEV ID or not (Yes, No).
Thin Image Advanced operations when GAD status is Simplex
|
GAD pair status |
Virtual LDEV ID |
I/O |
Thin Image Advanced pair operation |
|||||
|---|---|---|---|---|---|---|---|---|
|
Read |
Write |
Create pairs |
Split pairs |
Resync pairs |
Restore pairs |
Delete pairs |
||
|
SMPL |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
No |
No |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
|
|
No, but the GAD reserve attribute is set |
No |
No |
No |
No |
No |
No |
Yes |
|
Thin Image Advanced operations when GAD status is Mirroring
|
GAD pair status |
I/O mode |
Pair location |
I/O |
Thin Image Advanced pair operation |
|||||
|---|---|---|---|---|---|---|---|---|---|
|
Read |
Write |
Create pairs |
Split pairs |
Resync pairs |
Restore pairs |
Delete pairs |
|||
|
INIT |
Mirror (RL) |
Primary |
Yes |
Yes |
Yes |
Yes |
Yes |
No1 |
Yes |
|
Block |
Secondary |
No |
No |
No |
No2 |
No2 |
No1, 3 |
Yes |
|
|
COPY |
Mirror (RL) |
Primary |
Yes |
Yes |
Yes |
Yes |
Yes |
No1 |
Yes |
|
Block |
Secondary |
No |
No |
No |
No2 |
No2 |
No1, 3 |
Yes |
|
|
Notes:
|
|||||||||
Thin Image Advanced operations when GAD status is Mirrored
|
GAD pair status |
I/O mode |
Pair location |
I/O |
Thin Image Advanced 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 |
|
Secondary |
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 Advanced copy destination. |
|||||||||
Thin Image Advanced operations when no volume is set for the quorum disk and GAD status of GAD pairs is Blocked Quorum Disk
|
GAD pair status |
I/O mode |
Pair location |
I/O |
Thin Image Advanced pair operation |
|||||
|---|---|---|---|---|---|---|---|---|---|
|
Read |
Write |
Create pairs |
Split pairs |
Resync pairs |
Restore pairs |
Delete pairs/Suspend copy |
|||
|
PAIR |
Mirror(RL) |
Primary |
Yes |
Yes |
Yes |
Yes |
Yes |
No* |
Yes |
|
Mirror(RL) |
Secondary |
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 Advanced copy destination. |
|||||||||
Thin Image Advanced operations when GAD status is Suspended
|
GAD pair status |
I/O mode |
Pair location |
I/O |
Thin Image Advanced 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 |
|
|
Secondary |
No |
No |
Yes |
Yes |
Yes |
No |
Yes |
||
|
SSUS |
Block |
Secondary |
No |
No |
Yes |
Yes |
Yes |
No |
Yes |
|
SSWS |
Local |
Secondary |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Thin Image Advanced operations when GAD status is Blocked
|
GAD pair status |
I/O mode |
Pair location |
I/O |
Thin Image Advanced pair operation |
|||||
|---|---|---|---|---|---|---|---|---|---|
|
Read |
Write |
Create pairs |
Split pairs |
Resync pairs |
Restore pairs |
Delete pairs |
|||
|
PSUE |
Block |
Primary |
No |
No |
Yes |
Yes |
Yes |
No |
Yes |
|
Secondary |
No |
No |
Yes |
Yes |
Yes |
No |
Yes |
||