In an environment where the system volume is allocated to a machine in the Fujitsu ETERNUS storage system, the system volume can be backed up and restored using the two methods described below.
Backup and restoration using a backup volume
The replication function can be used to backup the system volume to the backup volume, and the system volume can be restored from the backup volume.
The system volume's backup destination volume can be registered as a transaction volume for the tape backup operation. When the volume is registered, the backup data copied from the system volume can be managed on tape media. The backup data on tape can be restored to the backup volume or the system volume.
Backup and restoration using tape directly
The system volume can be backed up directly to tape in LU (disk) units, and can be restored directly from tape.
Figure C.1 Overview of backup and restoration
Note
To allocate the system volume to the ETERNUS storage system, a hardware device (server) that supports system startup from an external ETERNUS storage system is required.
Note
Updates to system data during backup processing will cause inconsistencies between the system data and backup data. Therefore, system volume backup/restoration must be performed while the backup target system (server) is in the stopped state.
Note
The replication function is used to copy system volumes and backup volumes. A backup function is not supported.
Note
If the server to be backed up is running on the Linux OS, and if the root partition of the backup server /etc/grub.conf or /etc/fstab is specified using the volume label name (i.e. LABEL=/ or /boot), this will cause multiple partitions to exist with the specified volume labels.
This will cause the volume labels to be duplicated or to obscure the root partitions that must be specified, and the system may not operate correctly. Because of this, the device names (i.e.: /dev/sdal) should be used to specify the root partitions of /etc/grub.conf and /etc/fstab.
