Sharing volumes with global-active device

ShadowImage User Guide
Version
9.8.7
Audience
anonymous
Part Number
MK-98RD9021-17

The following table lists the volumes that can be shared between global-active device (GAD) and ShadowImage.

GAD volume

(CCI command)

ShadowImage volume

P-VOL

S-VOL

GAD P-VOL

YES

YES*

GAD S-VOL

YES

YES*

GAD S-VOL Reserve attribute volume

NO

NO

GAD quorum disk volume

NO

NO

* SI S-VOL is supported by the following storage systems:
  • VSP 5000 series: 90-05-01-xx/xx or later
  • VSP E series: 93-06-81-xx/xx or later
  • VSP G/F350, G/F370, G/F700, G/F900: 88-08-08-xx/xx or later

The following tables list the relationship between GAD pair statuses and ShadowImage tasks when sharing GAD pair volumes and ShadowImage pair volumes.

Note:
  • If a pair that cannot be split is in a consistency group (CTG), pairs in the CTG are suspended (PSUE status) when executing a CTG pair split function for ShadowImage.
  • To split a ShadowImage pair that links with a GAD pair and obtain a backup, stop I/O for the target backup volume, and then split the ShadowImage pair.

ShadowImage tasks when sharing GAD P-VOL and ShadowImage P-VOL

ShadowImage task

(CCI command)

GAD pair status and I/O mode

COPY

PAIR

PSUS

PSUE

Mirror

(RL)

Mirror

(RL)

Local

Block

Local

Block

Create a pair

(paircreate)

YES

YES

YES

YES

YES

YES

Create and split a pair

(paircreate -split)

YES

YES

YES

YES

YES

YES

Split a pair

(pairsplit)

YES

YES

YES

YES

YES

YES

Resynchronize a pair

(pairresync)

YES

YES

YES

YES

YES

YES

Reverse Copy a pair

(pairresync -restore)

NO

NO

YES

NO

YES

NO

Quick restore a pair

(pairresync -restore)

NO

NO

YES*

NO

YES*

NO

Suspend a pair task

(pairsplit -E)

YES

YES

YES

YES

YES

YES

Delete a pair

(pairsplit -S)

YES

YES

YES

YES

YES

YES

*This task cannot be performed if the migration source volume of Hitachi Volume Migration is contained in the same volume.

ShadowImage tasks when sharing GAD S-VOL and ShadowImage P-VOL

ShadowImage task

(CCI command)

GAD pair status and I/O mode

COPY

PAIR

SSUS

PSUE

SSWS

Block

Mirror

(RL)

Block

Block

Local

Create a pair

(paircreate)

YES

YES

YES

YES

YES

Create and split a pair

(paircreate -split)

NO

YES

YES

YES

YES

Split a pair

(pairsplit)

NO

YES

YES

YES

YES

Resynchronize a pair

(pairresync)

NO

YES

YES

YES

YES

Reverse Copy a pair

(pairresync -restore)

NO

NO

NO

NO

YES

Quick restore a pair

(pairresync -restore)

NO

NO

NO

NO

YES*

Suspend a pair task

(pairsplit -E)

YES

YES

YES

YES

YES

Delete a pair

(pairsplit -S)

YES

YES

YES

YES

YES

*This task cannot be performed if the migration source volume of Hitachi Volume Migration is contained in the same volume.

(VSP 5000 series) ShadowImage tasks when sharing GAD P-VOL and ShadowImage S-VOL

ShadowImage task

(CCI command)

 GAD pair status and I/O mode
COPY PAIR PSUS PSUE
Mirror(RL) Mirror(RL) Local Block Local Block

Create a pair

(paircreate)

 NO NO YES NO YES NO
Create and split a pair (paircreate -split) NO NO YES NO YES NO

Split a pair

(pairsplit)

 NO NO YES NO YES NO
Resynchronize a pair (pairresync) NO NO YES NO YES NO
Reverse Copy a pair (pairresync -restore) NO NO YES NO YES NO
Quick restore a pair (pairresync -restore) NO NO NO NO NO NO

Suspend a pair task

(pairsplit -E)

 YES YES YES YES YES YES

Delete a pair

(pairsplit -S)

YES YES YES YES YES YES

(VSP 5000 series) ShadowImage tasks when sharing GAD S-VOL and ShadowImage S-VOL

ShadowImage task

(CCI command)

 GAD pair status and I/O mode
COPY PAIR SSUS PSUE SSWS
Block Mirror(RL) Block Block Local

Create a pair

(paircreate)

 NO NO NO NO YES
Create and split a pair (paircreate -split) NO NO NO NO YES

Split a pair

(pairsplit)

 NO NO NO NO YES
Resynchronize a pair (pairresync) NO

NO

 NO NO YES
Reverse Copy a pair (pairresync -restore) NO NO NO NO YES
Quick restore a pair (pairresync -restore) NO NO NO NO NO

Suspend a pair task

(pairsplit -E)

 YES YES YES YES YES

Delete a pair

(pairsplit -S)

YES YES YES YES YES