Dell PowerVault MD3000i User's Guide - Page 73
Creating the Snapshot Using the Simple Path, Con Create, Snapshot Virtual Disks
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3 Remove the drive letter(s) of the source in Windows or unmount the virtual drive(s) in Linux to help guarantee a stable copy of the drive for the Snapshot. If this is not done, the snapshot operation will report that it has completed successfully, but the snapshot data will not be updated properly. NOTE: Verify that the virtual disk has a status of Optimal or Disabled by clicking the Summary tab and then clicking Disk Groups & Virtual Disks. 4 Follow any additional instructions for your operating system. Failure to follow these additional instructions can create unusable snapshot virtual disks. NOTE: If your operating system requires additional instructions, you can find those instructions in your operating system documentation. After your host server has been prepared, see "Creating the Snapshot Using the Simple Path" on page 73 to create the snapshot using the simple path. If you want to use a snapshot regularly, such as for backups, use the Disable Snapshot and Re-create Snapshot options to reuse the snapshot. Disabling and re-creating snapshots preserves the existing virtual disk-to-host mappings to the snapshot virtual disk. Creating the Snapshot Using the Simple Path NOTE: Removing the drive letter of the associated virtual disk in Windows or unmounting the virtual drive in Linux will help to guarantee a stable copy of the drive for the Snapshot. After first preparing the host server(s) as specified in the preceding procedure, complete the following steps to create a virtual disk snapshot using the simple path: 1 In MD Storage Manager, click the Configure tab, and then click Create Snapshot Virtual Disks. 2 The Additional Instructions dialog appears; click Close in this dialog to continue. 3 Click the plus sign (+) to the left of the disk group to expand it, then click the virtual disk from which you want to create a snapshot. 4 Click Next. A No Capacity Exists warning appears if there is not enough space in the disk group of the source virtual disk to create the snapshot. Snapshot Virtual Disks 73