Thin Image Advanced operations and GAD status

Global Active Device for VSP One Block

Version
10.5.x
File Size
25537 KB
Audience
anonymous
Part Number
MK-23VSP1B011-11
ft:lastEdition
2026-06-23

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:

  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 Advanced copy destination.

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