Sharing Thin Image volumes with global-active device

You can use a Thin Image (HTI) P-VOL as a global-active device (GAD) P-VOL or S-VOL.

The following tables list the relationship between Thin Image tasks and GAD pair status.

NoteIf you share GAD volumes with Thin Image volumes, stop I/O to a volume before storing snapshot data. Snapshot consistency cannot be guaranteed if you store snapshot data without stopping I/O to the volume.

For more information about GAD, see the Global-Active Device User Guide.

The following table lists the Thin Image tasks you can perform when the P-VOL is shared with a GAD P-VOL.

GAD status

I/O mode

HTI task

Store snapshot data

Create pair

Restore pair

Delete snapshot data

Delete pair

COPY

Mirror (RL)

Yes

Yes

No

Yes

Yes

PAIR

Mirror (RL)

Yes

Yes

No

Yes

Yes

PSUS

Local

Yes

Yes

Yes

Yes

Yes

Block

Yes

Yes

No

Yes

Yes

PSUE

Local

Yes

Yes

Yes

Yes

Yes

Block

Yes

Yes

No

Yes

Yes

Legend:

  • Yes: You can perform the task.
  • No: You cannot perform the task (the command is rejected).

The following table lists the Thin Image tasks you can perform when the P-VOL is shared with a GAD S-VOL.

GAD status

I/O mode

HTI task

Store snapshot data

Create pair

Restore pair

Delete snapshot data

Delete pair

COPY

Block

No

No

No

No

Yes

PAIR

Mirror (RL)

Yes

Yes

No

Yes

Yes

SSUS

Block

Yes

Yes

No

Yes

Yes

PSUE

Block

Yes

Yes

No

Yes

Yes

SSWS

Local

Yes

Yes

No

Yes

Yes

Legend:

  • Yes: You can perform the task.
  • No: You cannot perform the task (the command is rejected).
Parent Topic
  • Sharing Thin Image volumes with other software applications

    You can create Thin Image (HTI) pairs using pair volumes for other replication software applications, such as ShadowImage and TrueCopy. You can also create Thin Image pairs using volumes to which you define attributes using Data Retention Utility or CCI.

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