Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

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 data on the primary virtual disk as possible. The highest synchronization priority does, however, use more system resources, which can reduce system performance.

This example shows how to use the command in a script file:

create remoteReplication primary=”Jan_04_Account”
                                    secondary=”Jan_04_Account_B” remoteStorageArrayName=”Tabor”
                                    remotePassword=”jdw2ga05” syncPriority=highest
                                    writeMode=synchronous;

After you have created a remote replication, you can see the progress of data synchronization between the primary virtual disk and the secondary virtual disk by running the show remoteReplication synchronizationProgress command. This command shows the progress as a percentage of data synchronization that has completed.

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Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

Creating A Remote Replicated Pair

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