HP Serveur lame HP ProLiant BL465c Gen8 - Manual (Page 253)

Backing up a file system to tape
This section gives an example of backup of a file system to a tape. In this example, we back up the
file server
FSServer to a secondary volume in an online backup operation before backing it up from
a secondary volume to tape. As a mount point, we use E: . The example uses Operation_A as the
operation ID that identifies the file system to be backed up.
Resynchronizing copy groups
When usual operation is in the split state, resynchronize the copy groups before backing up the data.
When usual operation is in the pair status, there is no need to resynchronize the copy groups before
backing up data. Instead, when the tape backup is complete, resynchronize the copy group to initialize
it.
To resynchronize the copy group:
1. Clear the secondary volume cache.
Clear the system cache on the backup server before backing up the data.
To clear the system cache, execute EX_DRM_CACHE_PURGE on the backup server to mount or
unmount the secondary volume. For now, assume the copy group name as VG01,vol01 .
BKServer > EX_DRM_CACHE_PURGE Operation_A -cg VG01,vol01
2. Resynchronize the copy group.
Execute EX_DRM_RESYNC on the file server to resynchronize the copy groups. If there is a big
difference between the primary volume data and the secondary volume data when data is backed
up from the primary volume to the secondary volume, the backup might take a while.
Resynchronizing the copy group before backing up data will help speed up the backup time.
FSServer > EX_DRM_RESYNC Operation_A -cg VG01,vol01 -copy_size 7
Backing up a file system
To back up the file system:
1. Back up the file system to the secondary volume.
To do this, execute
EX_DRM_FS_BACKUP
. Specify the operation ID
Operation_A
as the
argument:
FSServer > EX_DRM_FS_BACKUP Operation_A
Application Agent CLI User Guide 253