User's Manual

hp StorageWorks File System Extender User Guide 183
In order to successfully restore the FSE implementation, all data that was backed up must be restored to
its original location. You may want to back up current data before performing a restore (in case the
restore fails).
• Restoring to different devices
Since restore is often needed when the hard disk has failed, it is very common to make a restore to
devices different than the ones used for backup. The only restriction is that the replacement disk must
have the same characteristics as the original disk had at the backup time (LVM volume names, volume
sizes, mount points).
• Backup media must be ready for restore
All backup media that is needed for restore must be available. Since the FSE implementation is
stopped, the loading and unloading of backup media must be done manually.
Prerequisites for restore
Linux specific
• You have to be logged on to the system as root in order to perform the restore steps.
• Logical volumes on all the clients that you are going to restore must have the same names, file system
types, and sizes as they did at the time of backup. These logical volumes are fsevar, fsepart, and
fsediskbuf (the latter only on the consolidated FSE implementation or FSE server).
• Logical volumes fsevar, fsepart, and fsediskbuf should be mounted on the specified location in
the FSE directory structure. See appendix ”Directory layout” on page 239 for more information.
• HSM file systems must not be mounted.
• HSM file systems must have the same logical volume names as before.
Windows specific
• You need administrative privileges to perform the restore tasks. These privileges are granted only if you
are either locally logged to the system as Administrator (recommended) or using a remote access
software that supports logging in with the real Administrator account. The Windows native Remote
Desktop tool, for example, may be unsuitable for these tasks, since it uses a different Administrator
account when logging in remotely.
• Disk volumes that will store the restored HSM file systems must have at least the same sizes as they had
at the time of backup creation.
• Mount points for the restored HSM file systems must be the same as they were when the backup was
made.
Executing FSE restore
To restore the FSE implementation, perform the following steps on each FSE implementation host that you
want to restore. Restore external FSE clients before restoring the FSE server:
1. Stop FSE processes:
2. Start the FSE processes that have to be running to allow the restore process:
3. This step is required only on Windows FSE clients.
Windows specific
If you are operating on a Windows FSE client, detach the HSM file system filter from all disk volumes
that store HSM file systems. For each such volume, run the following command:
4. On the FSE server, initiate the restore process with the following command:
The FSE implementation starts restoring data from the backup media. In case that multiple media were used
for backup, you must provide the media when requested. You must insert the media in the same sequence
as they were used for backup. Note that the same drive must be used for all media.
fse --stop
fse --startrestore
C:\>fse --dismount-ntfs VolumeName
fserestore