Dell PowerVault NX1950 Bedienungsanleitung PDF herunterladen (Seite 45)

Detailed End-to-End iSCSI Setup 45

To automate the creation of snapshots and the mounting of iSCSI Virtual

Disks for regular backups, you can use the Schedule Snapshot Wizard.

Snapshots of Virtual Disks that reside on an NTFS file system volume are

persistent, which means they remain after a system restart.

Snapshots that are created on the iSCSI Target server are crash consistent.

iSCSI Snapshots are created using VSS and a storage array with a hardware

provider designed for use with VSS. To enable consistent snapshots in Microsoft

iSCSI Software Target, you require the Microsoft iSCSI Software Target VSS

Hardware Provider. The Microsoft iSCSI Software Target VSS Hardware

Provider is available as an installation option in iSCSI Software Target. The

hardware provider coordinates with the local VSS to create a consistent image of

the volume that can be transported to a central backup server.

In a PowerVault NX 1950 Storage system, you can create an iSCSI Snapshot

in two ways:

• Manually create a Snapshot of a single Virtual Disk in the Microsoft iSCSI

Software Target console.

•Use the

Schedule Snapshot Wizard

to set up a schedule for creating a

single Snapshot or recurring Snapshots automatically.

Before Creating Snapshots

Before creating snapshots for Virtual Disks perform the following steps. Use

the Windows Explorer and go to the volume that contains the Virtual Disks

that you are creating snapshots for.

Go to

Volume

→

Properties

→

Shadow Copies

→

Settings

. Ensure that the

Located on this volume

option in the

Storage Area

tab displays the same

drive letter as that of the volume.

Click

Details

to verify the volume usage. The default settings are as

follows:

–

Maximum size

–

Use limit

—size in MB or

No Limit

Change the size according to Virtual Disk/Snapshot size or change the

settings to

No Limit

NOTICE: Ensure that you have enough space in the volume to hold Virtual Disk

Snapshots. If there is not enough space, the Snapshots are lost.

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