Sometimes it is useful to boot from a Solaris OS install image on DVD
or CD media to perform a system recovery. Resetting the root password
is one example of when using the install image is useful.
If you are using a Solaris Volume Manager configuration, then you want to mount
the Solaris Volume Manager volumes instead of the underlying disks. This step is especially
important if the root (/) file system is mirrored. Because Solaris Volume Manager is
part of the Solaris OS, mounting the Solaris Volume Manager volumes ensures that any
changes are reflected on both sides of the mirror.
Use the following procedure to make the Solaris Volume Manager volumes accessible from a Solaris OS DVD or CD-ROM install image.
How to Recover a System Using a Solaris Volume Manager Configuration
Boot your system from the Solaris OS installation DVD or CD media. Perform
this procedure from the root prompt of the Solaris miniroot.
Mount as read only the underlying disk containing the Solaris Volume Manager configuration.
# mount -o ro /dev/dsk/c0t0d0s0 /a
Copy the md.conf file into /kernel/drv directory.
# cp /a/kernel/drv/md.conf /kernel/drv/md.conf
Unmount the file system from the miniroot.
# umount /a
Update the Solaris Volume Manager driver to load the configuration. Ignore any warning messages printed by the update_drv command.
# update_drv -f md
Configure the system volumes.
# metainit -r
If you have RAID-1 volumes in the Solaris Volume Manager configuration, resynchronize them.
# metasync mirror-name
Solaris Volume Manager volumes should be accessible using the mount command.
# mount /dev/md/dsk/volume-name /a
Example 25.6. Recovering a System Using a Solaris Volume Manager Configuration
#mount -o ro /dev/dsk/c0t0d0s0 /a#cp /a/kernel/drv/md.conf /kernel/drv/md.conf#umount /a#update_drv -f mdCannot unload module: md Will be unloaded upon reboot. Forcing update of md.conf. devfsadm: mkdir fialed for /dev 0xled: Read-only file system devfsadm: inst_sync failed for /etc/path_to_inst.1359: Read-only file system devfsadm: WARNING: failed to update /etc/path_to_inst #metainit -r#metasync d0#mount /dev/md/dsk/d0 /a