Adaptec 5325301656 - Snap Server 14000 NAS, Руководство администратора

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Coordinating Snapshot and Backup Operations
Chapter 7 Snapshots 99
read-only), a snapshot share inherits access privileges from its associated live-
volume share.
Note
The same folders appear on the Web View screen when you connect to the
Snap Server using a Web browser; however, the snapshot share folder does not
provide access to the snapshot; it will always appear to be empty. You can prevent
the snapshot share from displaying on this Web View screen by selecting the
Hide
Snapshot Share
option when creating or editing a share.
Accessing Snapshots Within the Snapshot Share
A snapshot share contains a series of directories. Each directory inside the snapshot
share represents a different snapshot. The directory names reflect the date and time
the snapshot was created. For example, assume the snapshot share named
Sales_SNAP contains the following four directories:
latest
2005-12-25.120000
2006-01-01.000100
2006-01-07.020100
The latest directory always points to the most recent snapshot (in this case,
2006-
01-07.020100
, or January 7th, 2006, at 2:01 a.m.). A user may view an individual
file as it existed at a previous point in time or even roll back to a previous version of
the file by creating a file copy to the current live volume.
Note
The latest subdirectory is very useful for setting up backup jobs as the name
of the directory is always the same and always points to the latest available
snapshot.
Coordinating Snapshot and Backup Operations
Like backups, snapshots can be scheduled to recur at a designated time and
interval. In addition to synchronizing the backup and snapshot schedules, you must
create a share (and snapshot share) to the appropriate directory so that the backup
software can access the snapshot. For most backup purposes, the directory specified
should be one that points to the root of the volume so that all of the volume’s data is
backed up and available from the snapshot share.
1
Create a snapshot for each volume you want to back up.
In the Administration Tool, navigate to the
Storage > Snapshots
screen
,
and click
Create Snapshot
. When defining and scheduling the snapshot, consider the
following:
• In the Create Recovery File pull-down menu, select
Yes
to ensure that the ACL,
extended attributes, and quota information are captured and appended to the
snapshot. This step is needed because many backup packages do not back up