PRIMECLUSTER Global Disk Services Configuration and Administration Guide 4.1 (Linux)

6.1.1 Offline Backup

1) Stopping the services

1a) With a shared volume used in a cluster application

1a-1) Exit all cluster applications.

1a-2) Activate the volume on a node on which backup is conducted.

# sdxvolume -N -c Class1 -v Volume1

1b) With a volume not used by a cluster application

1b-1) Stop the services using the volume.

1b-2) When the volume is used as a file system, unmount the file system. The following shows an example when the mount point is /mnt1.

# cd /
# umount /mnt1

 

2) Backing Up

Back up volume data. The following shows an example of backing up data to a tape medium of tape device /dev/st0.

For details about the backup method, see manuals of a file system to be backed up and used commands.

• When backing up data held in a raw device with the dd(1) command

  # dd if=/dev/sfdsk/Class1/rdsk/Volume1 of=/dev/st0 bs=32768

   

3) Resuming the services

3a) With a shared volume used in a cluster application

3a-1) Inactivate the volume on the node where backup was conducted.

# sdxvolume -F -c Class1 -v Volume1

3a-2) Launch cluster applications.

3b) With a volume not used by a cluster application

3b-1) When the volume is used as a file system, mount the file system. The following shows examples when the mount point is /mnt1.

• For a ext3 file system

  # mount -t ext3 /dev/sfdsk/Class1/dsk/Volume1 /mnt1

3b-2) Resume the services.