Dell PowerVault MD3260 Administrator's Guide - Page 102
Creating The Snapshot Using The Advanced Path, SMrepassist Utility
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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 must be in the proper state. To prepare your host server: 1. Stop all I/O activity to the source. 2. Using your Windows system, flush the cache to the source. At the host prompt, type SMrepassist -f and press . For more information, see SMrepassist Utility. 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 reports that it has completed successfully, but the snapshot data is not updated properly. NOTE: To verify that the virtual disk is in Optimal or Disabled state, select the Summary tab and then click Disk Groups & Virtual Disks. The Create Snapshot Virtual Disk Wizard - Introduction dialog is displayed. 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 A Snapshot Virtual Disk Using The Advanced Path, to create the snapshot using the advanced 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 Advanced Path NOTE: Removing the drive letter of the associated virtual disk in Windows or unmounting the virtual drive in Linux helps to guarantee a stable copy of the drive for the Snapshot. Prepare the host server(s) as specified in Preparing Host Servers To Create The Snapshot Using The Advanced Path. To create a virtual disk snapshot using the advanced path: 1. Stop the host application accessing the source virtual disk, and unmount the source virtual disk. 2. In the AMW, select the Storage & Copy Services tab, select a valid source virtual disk. 3. Select Copy Services → Snapshot Image → Create Snapshot Virtual Disk. Alternatively, right-click the source virtual disk and select Create → Snapshot Virtual Disk from the pop-up menu. The Create Snapshot Virtual Disk Wizard - Introduction dialog is displayed. 4. Select Advanced, and click Next. The Specify Names window is displayed. 5. Enter the Snapshot virtual disk name and the Snapshot repository virtual disk name and click Next. The Allocate Capacity window is displayed. 6. In the Capacity allocation area, select: 102