HP StoreAll Storage - Manual (Page 357)

20 Creating StoreAll software snapshots
The StoreAll software snapshot feature allows you to capture a point-in-time copy of a file system
or directory for online backup purposes and to simplify recovery of files from accidental deletion.
Software snapshots can be taken of the entire file system or selected directories. Users can access
the file system or directory as it appeared at the instant of the snapshot.
NOTE: To accommodate software snapshots, the inode format was changed in the StoreAll 6.0
release. Consequently, files used for snapshots must either be created on StoreAll 6.0 or later, or
the pre-6.0 file system containing the files must be upgraded for snapshots. To upgrade a file
system, use the upgrade60.sh utility. For more information, see the
HP StoreAll OS CLI Reference
Guide .
Before taking snapshots of a file system or directory, you must enable the directory tree for snapshots.
An enabled directory tree is called a snap tree. You can then define a schedule for taking periodic
snapshots of the snap tree, and you can also take on-demand snapshots.
Users can access snapshots using NFS or SMB. All users with access rights to the root of the
snapshot directory tree can navigate, view, and copy all or part of a snapshot.
NOTE:
•
Snapshots are read only and cannot be modified, moved, or renamed. However, they can
be copied.
•
You can use either the software method or the block method to take snapshots on a file system.
Using both snapshot methods simultaneously on the same file system is not supported.
File system limits for snap trees and snapshots
A file system can have a maximum of 1024 snap trees. Each snap tree can have a maximum of
1024 snapshots.
Configuring snapshot directory trees and schedules
You can enable a directory tree for snapshots using either the Management Console or the CLI;
however, the Management Console must be used to configure a snapshot schedule. To use the
CLI, see the ibrix_snap command in the HP StoreAll OS CLI Reference Guide.
On the Management Console, select Snapshots from the Navigator. The Snap Trees panel lists all
directory trees currently enabled for snapshots. The Schedule Details panel shows the snapshot
schedule for the selected directory tree.
File system limits for snap trees and snapshots 357