Create Remote Virtual Disk Mirror

Create Remote Virtual Disk Mirror

This command creates both the primary and secondary virtual disks for a Remote Virtual Disk Mirror. This command also sets the write mode (synchronous or asynchronous) and synchronization priority.

Syntax

create remoteMirror primary="primaryVirtual DiskName" secondary="secondaryVirtual DiskName" (remoteStorageArrayName="storageArrayName" | remoteStorageArrayWwn="wwn") [remotePassword="password" syncPriority=(highest | high | medium | low | lowest) autoResync=(enabled | disabled) writeOrder=(preserved | notPreserved) writeMode=(synchronous | asynchronous)]

Parameters

Parameter Description

primary
The name of an existing virtual disk on the local storage array you want to use for the primary virtual disk. Enclose the primary virtual disk name in double quotes (" ").

secondary
The name of an existing virtual disk on the remote storage array you want to use for the secondary virtual disk. Enclose the secondary virtual disk name in double quotes (" ").

remoteStorageArrayName
The name of the remote storage array. Enclose the remote storage array name in double quotes (" ").

remoteStorageArrayWwn
The world wide name of the remote storage array. Enclose the world wide name in double quotes (" ").

remotePassword
The password for the remote storage array. Use when the remote storage array is password protected. Enclose the password in double quotes (" ").

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.
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

You can use any combination of alphanumeric characters, hyphens, and underscores for the name. Names can have a maximum of 30 characters.

When choosing the primary and secondary virtual disks, the secondary virtual disk must be of equal or greater size than the primary virtual disk. The RAID level of the secondary virtual disk does not have to be the same as the primary virtual disk.

For a 2882 RAID controller module, you can define 32 remote mirrors. For the 4884 and 5884 RAID controller modules, you can define 64 remote mirrors.

Passwords are stored on each storage array in a management domain. If a password was not previously set, you do not need a password. The password can be any combination of a alpha-numeric characters with a maximum of 30 characters. (You can define a storage array password using the set storageArray command.)

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 resource to perform the full synchronization, which will decrease performance for host data transfers.

The writeOrder parameter applies only to asynchronous mirrors and makes them become part of a consistency group. Setting the write 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 requires forcing a full synchronization to ensure the secondary virtual disk has the same data as the primary.

Minimum Firmware Level

6.10

Parameter	Description
`primary`	The name of an existing virtual disk on the local storage array you want to use for the primary virtual disk. Enclose the primary virtual disk name in double quotes (" ").
`secondary`	The name of an existing virtual disk on the remote storage array you want to use for the secondary virtual disk. Enclose the secondary virtual disk name in double quotes (" ").
`remoteStorageArrayName`	The name of the remote storage array. Enclose the remote storage array name in double quotes (" ").
`remoteStorageArrayWwn`	The world wide name of the remote storage array. Enclose the world wide name in double quotes (" ").
`remotePassword`	The password for the remote storage array. Use when the remote storage array is password protected. Enclose the password in double quotes (" ").
`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. 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.