Tandberg Data NAS Hardware Viking FS-1500 - Manual (Page 40)

Tandberg Data Shadow Copy Service
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4-2 Tandberg Viking Series Storage Server Administration Manual
4.2. Planning for use of Shadow Copy
Before Shadow Copy Service is initiated on the NAS appliance and the client
interface is made available to end users, consider the followings:
• From what volume will shadow copies be taken?
• How much disk space should be allocated for shadow copies?
• Will separate disks be used to store shadow copies?
• How frequently will shadow copies be made?
4.2.1. Identifying the Volume
Shadow copies are taken for a complete volume, but not for a specific
directory. Shadow copies work best when the server stores user files, such
as documents, spreadsheets, presentations, graphics, or database files.
Note
Shadow copies should not be used to provide access to previous versions of
application or e-mail databases.
Shadow copies are designed for volumes that store user data such as home
directories and My Documents folders that are redirected by using Group
Policy or other shared folders in which users store data.
Shadow copies work with compressed or encrypted files and retain whatever
permissions were set on the files when the shadow copies were taken. For
example, if a user is denied permission to read a file, that user would not be
able to restore a previous version of the file, or be able to read the file after it
has been restored.
Although shadow copies are taken for an entire volume, users must use
shared folders to access shadow copies. Administrators on the local server
(the NAS appliance) must also specify the
\\nasname\sharename path to
access shadow copies. If administrators or end users want to access a
previous version of a file that does not reside in a shared folder, the
administrator must first share the folder.
Note
Shadow copies are available only on NTFS, not FAT or FAT32 volumes.
Files or folders that are recorded by using Shadow Copy appear static, even
though the original data is changing.