Dell PowerVault MD3420 - Manual (Page 108)

Determining Candidates For A Remote Replicated Pair
All of the virtual disks and physical disks on the remote storage array might not be available for use as
secondary virtual disks. To determine which virtual disks on a remote storage array that you can use as
candidates for secondary virtual disks, use the show remoteReplication candidates command.
This command returns a list of the virtual disks that you can use when creating a remote replication.
The command takes this form:
c:\...\smX\client>smcli 123.45.67.88 123.45.67.89
-c “show remoteReplication candidates primary= \“virtualDiskName\”
remoteStorageArrayName=\“storageArrayName\”;”
where virtualDiskName is the name of the virtual disk that you want to use for the primary virtual disk,
and storageArrayName is the remote storage array that contains possible candidates for the secondary
virtual disk. Enclose both the virtual disk name and the storage array name in double quotation marks (“ ”).
Creating A Remote Replicated Pair
When you create a new remote replication, you must define which virtual disks that you want to use for
the primary (local) virtual disk and the secondary (remote) virtual disk. You define the primary virtual disk
by the name of the virtual disk. You define the secondary virtual disk by name with either the name or the
World Wide Identifier (WWID) of the storage array on which the secondary virtual disk resides. The
primary virtual disk name, the secondary virtual disk name, and the remote storage array name (or WWID)
are the minimum information that you need to provide. Using this command, you can also define
synchronization priority, write order, and write mode.
The command takes this form:
create remoteReplication primary=“primaryVirtualDiskName”
secondary=“secondaryVirtualDiskName”
(remoteStorageArrayName=“storageArrayName” |
remoteStorageArrayWwn=“wwID”) remotePassword=password
syncPriority=(highest | high | medium | low | lowest)
writeOrder=(preserved | notPreserved)
writeMode=(synchronous | asynchronous)
NOTE: You can use the optional parameters as needed to help define your configuration.
This example shows the create remoteReplication command:
c:\...\smX\client>smcli 123.45.67.88 123.45.67.89
-c “create remoteReplication primary=
\”Jan_04_Account\”
secondary=\”Jan_04_Account_B\”
remoteStorageArrayName=\”Tabor\”
remotePassword=\”jdw2ga05\” syncPriority=highest
writeMode=synchronous;”
The command in this example creates a remote replication in which the primary virtual disk is named
Jan_04_Account on the local storage array. The secondary virtual disk is named Jan_04_Account_B on
the remote storage array that is named Tabor. The names used in this example are similar, but that is not
a requirement for the virtual disk names in a remote replicated pair. In this example, the remote storage
array has a password that you must enter when making any change to the storage array configuration.
Creating a remote replicated pair is a significant change to a storage array configuration.
Setting the write mode to synchronous and the synchronization priority to highest means that host write
requests are written to the primary virtual disk and then immediately copied to the secondary virtual disk.
These actions help to make sure that the data on the secondary virtual disk is as accurate a copy of the
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