Mirroring system disks will protect the data when a physical disk on one side fails. However, data must be restored from backup data created in advance if the data is damaged due to a critical failure caused by multiple breakdown and so on or by an operation mistake.
This section discusses the method of backing up the data of a system disk which is mirrored by GDS and a method of restoring from the tape in a UFS boot environment. You must follow different restore procedures depending on whether or not the system can be booted.
Note
Data backed up before system disk mirroring cannot be restored back to the mirrored system disk. If system disk mirroring is configured, perform system disk backup using this procedure.
See
For backing up and restoring volumes (e.g. /opt, /home) other than system volumes (/, /usr, /var, swap area) among volumes in the root class, see "6.5 Backing Up and Restoring Local Disks and Shared Disks."
