DELL MD3220 User Manual

138

Configuration: Premium Feature—Snapshot Virtual Disks

NOTE:

For details on mapping the snapshot virtual disk to the secondary node,

refer to the

Dell™ PowerVault™ MD3200 and MD3220 Storage Arrays With

Microsoft® Windows Server® Failover Clusters

on support.dell.com/manuals.

NOTE:

You can create concurrent snapshots of a source virtual disk on both the

source disk group and on another disk group.

Before creating a Snapshot Virtual Disk, note that:

• The following types of virtual disks are not valid source virtual disks:

• Snapshot repository virtual disks
• Snapshot virtual disks
• Target virtual disks that are participating in a virtual disk copy.

NOTE:

Virtual Disk Copy is an Advanced (Premium) feature.

• You cannot create a snapshot of a virtual disk that contains unreadable

sectors.

• You must satisfy the requirements of your host operating system for

creating snapshot virtual disks. Failure to meet the requirements of your

host operating system results in an inaccurate snapshot of the source

virtual disk or the target virtual disk in a virtual disk copy.

NOTE:

Before you create a new snapshot of a source virtual disk, stop any data

access (I/O) activity or suspend data transfer to the source virtual disk to ensure

that you capture an accurate snapshot of the source virtual disk. Close all

applications, including Windows Internet Explorer®, to make sure all I/O activity

has stopped.

NOTE:

Removing the drive letter of the associated virtual disk(s) in Windows or

unmounting the virtual drive in Linux helps to guarantee a stable copy of the drive

for the Snapshot.

Before creating a snapshot virtual disk, the host server has to be in the proper

state. To ensure that the host server is properly prepared to create a snapshot

virtual disk, you can either use an application to carry out this task, or you can

perform the following steps:

1 Stop all I/O activity to the source.
2 In the AMW, select the Logical tab and select a valid source virtual disk.
3 Select Virtual Disk Snapshot Create. Alternatively, you can right-

click the source virtual disk and select Create Snapshot Virtual Disk from

the pop-up menu.

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