Global-active device status and Volume Migration pair operations

Ops Center High Availability User Guide

Version
10.9.x
File Size
3.9 MB
Audience
anonymous
Part Number
MK-99ADM003-14

The ability of Volume Migration to create or cancel migration plans depends on the status of the GAD pair.

The following table describes if you can create or cancel migration plans when GAD volumes are not mirrored.

GAD pair status Virtual LDEV ID I/O from the server Volume Migration operation
Read Write Create migration plans Cancel migration plans
SMPL Available Y Y Y Y
Not available N N N Y
Not available (Virtual attribute: GAD reserve) N N N Y

Legend

Y: Can be performed

N: Cannot be performed

The following table describes if you can create or cancel migration plans when GAD volumes are being mirrored.

GAD pair status I/O mode Pair location I/O from the server Volume Migration operation
Read Write Create migration plans Cancel migration plans
INIT/COPY Mirror(RL) Primary Y Y N Y
Block Secondary N N N Y

Legend

Y: Can be performed

N: Cannot be performed

The following table describes if you can create or cancel migration plans when GAD volumes are mirrored.

GAD pair status I/O mode Pair location I/O from the server Volume Migration operation
Read Write Create migration plans Cancel migration plans
PAIR Mirror(RL) Primary Y Y N Y
Secondary Y Y N Y

Legend

Y: Can be performed

N: Cannot be performed

The following table describes if you can create or cancel migration plans when the GAD pair is suspended.

GAD pair status I/O mode Pair location I/O from the server

Volume Migration operation

Read Write

Create migration plans

Cancel migration plans

PSUS/PSUE

Local

Primary

Y

Y

Y

Y

Block

Any

N

N

Y

Y

SSUS

Block

Secondary

N

N

Y

Y

SSWS

Local

Secondary

Y

Y

Y

Y

Legend

Y: Can be performed

N: Cannot be performed

The following table describes if you can create or cancel migration plans when the GAD pair is blocked.

GAD pair status I/O mode Pair location I/O from the server Volume Migration operation
Read Write Create migration plans Cancel migration plans
PSUE Block Primary N N Y Y
Secondary N N Y Y

Legend

Y: Can be performed

N: Cannot be performed