Dell PowerVault MD3000i User's Guide - Page 70
filename-identifier, Before creating a snapshot virtual disk, the host server has to be in the proper
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Before creating a Snapshot Virtual Disk, note the following: • 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 point-in-time image of the source virtual disk or the target virtual disk in a virtual disk copy. NOTICE: Before you create a new point-in-time image 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 point-in-time image 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 will help 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 Using your Windows system, flush the cache to the source. At the host prompt, type SMrepassist -f and press . See "SMrepassist Utility" on page 102 for more information. 70 Snapshot Virtual Disks