Set Remote Virtual Disk Mirror

??? Set Remote Virtual Disk Mirror

Set Remote Virtual Disk Mirror

This command defines the properties for a Remote Virtual Disk Mirror pair.

Syntax

set remoteMirror (localVirtualDisk [virtualDiskName] | localVirtual Disks [virtual diskName1 ... virtual diskNamen]) [force=(TRUE | FALSE)] syncPriority=(highest | high | medium | low | lowest) autoResync=(enabled | disabled) writeOrder=(preserved | notPreserved) writeMode=(synchronous | asynchronous) role=(primary | secondary)

Parameters

Parameter Description

virtualDiskName
Name of the primary virtual disk for which you want to define properties. You can enter more than one primary virtual disk name. Enclose the primary virtual disk name in square brackets ([ ]). If the primary virtual disk name has special characters, you must also enclose the primary virtual disk name in double quotes (" ").

role
Defines whether the virtual disk acts as the primary or secondary virtual disk. To define the virtual disk as the primary virtual disk, set this parameter to primary. To define the virtual disk as the secondary virtual disk, set this parameter to secondary. This parameter applies only when the virtual disk is part of a mirror relationship.

force
Defines that you want to force the role reversal if the communications link between the storage arrays is down and promotion or demotion on the local side will result in a dual primary or dual secondary condition. To force a role change, set this parameter to TRUE. The default is FALSE.

syncPriority
Defines the priority full synchronization will have relative to host I/O activity. Valid entries are highest, high, medium, low, or lowest

autoResync
This parameter defines the settings for automatic resynchronization between the primary virtual disks and the secondary virtual disks of a Remote Virtual Disk Mirroring pair. This parameter has the following arguments:

enabled - Automatic resynchronization is turned on. You do not need to do anything further to resynchronize the primary and secondary virtual disks.
enabled - Automatic resynchronization is turned on. You do not need to do anything further to resynchronize the primary and secondary virtual disks.
disabled - Automatic resynchronization is turned off. To resynchronize the primary virtual disks and the secondary virtual disks, you must enter the resume remoteMirror command.

writeOrder
Defines write order for data transmission between the primary virtual disk and secondary virtual disk. Valid values are preserved or notPreserved.

writeMode
Defines how the primary virtual disk writes to the secondary virtual disk. Valid values are synchronous or asynchronous.

Notes

When you use this command, you can specify one or more of the parameters. You do not, however, need to use all of the parameters.

Note: You cannot change remote mirror virtual disk roles and set other parameters in the same command. If you want to change remote mirror virtual disk roles and set other parameters, you must first issue a command to change the remote mirror virtual disk role and then issue a second command to set other parameters.

Synchronization priority defines the amount of system resources used to synchronize the data between the primary and secondary virtual disks of a mirror relationship. If you select the highest priority level, the data synchronization uses the most system resources to perform the full synchronization, which will decrease performance for host data transfers.

Setting the writer order to preserved causes the mirrored pair to transmit data from the primary to secondary in the same order as the host writes to the primary. In the event of a transmission link failure, the data is buffered until a full synchronization can occur. This can require additional system overhead to maintain the buffered data, slowing operations. Setting write order to notPreserved frees the system from having to maintain data in a buffer, but it requires forcing a full synchronization to ensure the secondary virtual disk has the same data as the primary virtual disk.

Minimum Firmware Level

6.10

Parameter	Description
`virtualDiskName`	Name of the primary virtual disk for which you want to define properties. You can enter more than one primary virtual disk name. Enclose the primary virtual disk name in square brackets ([ ]). If the primary virtual disk name has special characters, you must also enclose the primary virtual disk name in double quotes (" ").
`role`	Defines whether the virtual disk acts as the primary or secondary virtual disk. To define the virtual disk as the primary virtual disk, set this parameter to primary. To define the virtual disk as the secondary virtual disk, set this parameter to secondary. This parameter applies only when the virtual disk is part of a mirror relationship.
`force`	Defines that you want to force the role reversal if the communications link between the storage arrays is down and promotion or demotion on the local side will result in a dual primary or dual secondary condition. To force a role change, set this parameter to TRUE. The default is FALSE.
`syncPriority`	Defines the priority full synchronization will have relative to host I/O activity. Valid entries are highest, high, medium, low, or lowest
`autoResync`	This parameter defines the settings for automatic resynchronization between the primary virtual disks and the secondary virtual disks of a Remote Virtual Disk Mirroring pair. This parameter has the following arguments: enabled - Automatic resynchronization is turned on. You do not need to do anything further to resynchronize the primary and secondary virtual disks. enabled - Automatic resynchronization is turned on. You do not need to do anything further to resynchronize the primary and secondary virtual disks. disabled - Automatic resynchronization is turned off. To resynchronize the primary virtual disks and the secondary virtual disks, you must enter the resume remoteMirror command.
`writeOrder`	Defines write order for data transmission between the primary virtual disk and secondary virtual disk. Valid values are preserved or notPreserved.
`writeMode`	Defines how the primary virtual disk writes to the secondary virtual disk. Valid values are synchronous or asynchronous.