Tandberg Data Viking FS-1600 manual Identifying the Storage Area, Tandberg DataShadow Copy Service

Tandberg DataShadow Copy Service

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When using a basic disk as a storage area for shadow copies and converting the disk into a dynamic disk, it is important to take the following precaution to avoid data loss:

•If the disk is a non-boot volume and is a different volume from where the original files reside, first dismount and take offline the volume containing the original files before converting the disk containing shadow copies to a dynamic disk.

•The volume containing the original files must be brought back online within 20 minutes, otherwise, the data stored in the existing shadow copies is lost.

•If the shadow copies are located on a boot volume, the disk to can be converted to dynamic without losing shadow copies.

Note

Use the mountvol command with the /p option to dismount the volume and take it offline. Mount the volume and bring it online using the mountvol command or the Disk Management snap-in.

4.2.3.Identifying the Storage Area

To store the shadow copies of another volume on the same NAS appliance, a volume can be dedicated on separate disks. For example, if user files are stored on H:\, another volume such as S:\ can be used to store the shadow copies. Using a separate volume on separate disks provides better performance and is recommended for heavily used NAS appliance.

If a separate volume will be used for the storage area (where shadow copies are stored), the maximum size should be changed to No Limit to reflect the space available on the storage area volume instead of the source volume (where the user files are stored).

Disk space for shadow copies can be allocated on either the same volume as the source files or a different volume. There is, however, a trade-off between ease of use and maintenance versus performance and reliability that the system administrator must consider.

For example, by keeping the shadow copy on the same volume, although there is a potential gain in ease of setup and maintenance, there may be a reduction in performance and reliability.

Caution

If shadow copies are stored on the same volume as the user files, note that a burst of disk input/output (I/O) can cause all shadow copies to be deleted. If the sudden deletion of shadow copies is unacceptable to administrators or end users, it is best to use a separate volume on separate disks to store shadow copies.

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