How to Restore an Encapsulated root (/) File System (VERITAS Volume Manager)

Use this procedure to restore an encapsulated root (/) file system to a node. The node being restored should not be booted. Be sure the cluster is running problem-free before performing the restore procedure.

Since you must partition the new disk using the same format as the failed disk, identify the partitioning scheme before you begin this procedure, and recreate file systems as appropriate.

1. Replace the failed disk on the node where the root file system will be restored.

   Refer to disk replacement procedures in the documentation that came with your server.

2. Boot the node being restored.

   • If using the Solaris CD-ROM, run the following command:

     ok boot cdrom -s

   • If using a JumpStart server, run the following command:

     ok boot net -s

3. Create all the partitions and swap on the root disk using the format(1M) command.

   Recreate the original partitioning scheme that was on the failed disk.

4. Create the root (/) file system and other file systems as appropriate, using the newfs(1M) command.

   Recreate the original file systems that were on the failed disk.

   ---

   Note –

   Be sure to create the /global/.devices/node@nodeid file system.

   ---

5. Mount the root (/) file system on a temporary mount point.

   # mount device temp-mountpoint

6. Restore the root (/) file system from backup.

   # cd temp-mountpoint # ufsrestore rvf dump-device # rm restoresymtable

7. Create an empty install-db file.

   This puts the node in VxVM install mode at the next reboot.

   # touch /temp-mountpoint/etc/vx/reconfig.d/state.d/install-db

8. Remove or comment out the following entries from the /temp-mountpoint/etc/system file.

   * rootdev:/pseudo/vxio@0:0 * set vxio:vol_rootdev_is_volume=1

9. Edit the /temp-mountpoint/etc/vfstab file and replace all VxVM mount points with the standard disk devices for the root disk, such as /dev/dsk/c0t0d0s0.

   Example: Change from— /dev/vx/dsk/rootdg/rootvol /dev/vx/rdsk/rootdg/rootvol / ufs 1 no - Change to— /dev/dsk/c0t0d0s0 /dev/rdsk/c0t0d0s0 / ufs 1 no -

10. Unmount the temporary file system and check the file system.

    # cd / # umount temp-mountpoint # fsck raw-disk-device

11. Install the boot block on the new disk.

    # /usr/sbin/installboot /usr/platform/`uname -i`/lib/fs/ufs/bootblk raw-disk-device

12. Reboot the node in single-user mode.

    # reboot -- "-s"

13. Update the disk ID using scdidadm(1M).

    # scdidadm -R /dev/rdsk/c0t0d0

14. Run vxinstall to encapsulate the disk and reboot.

    # vxinstall

15. If there is a conflict in minor number with any other system, unmount the global devices and reminor the disk group.

    • Unmount the global devices file system on the cluster node.

      # umount /global/.devices/node@nodeid

    • Reminor the rootdg disk group on the cluster node.

      # vxdg reminor rootdg 100

16. Shut down and reboot the node in cluster mode.

    # shutdown -g0 -i6 -y

Example—Restoring an Encapsulated root (/) File System (VERITAS Volume Manager)

The following example shows an encapsulated root (/) file system restored to the node phys-schost-1 from the tape device /dev/rmt/0.

[Replace the failed disk and boot the node:]
ok boot cdrom -s
[Use format and newfs to create partitions and file systems]
[Mount the root file system on a temporary mount point:]
# mount /dev/dsk/c0t0d0s0 /a
[Restore the root file system:]
# cd /a
# ufsrestore rvf /dev/rmt/0
# rm restoresymtable
[Create an empty install-db file:]
# touch /a/etc/vx/reconfig.d/state.d/install-db
[Edit /etc/system on the temporary file system and remove or comment out the following entries:]
	# rootdev:/pseudo/vxio@0:0
	# set vxio:vol_rootdev_is_volume=1
[Edit /etc/vfstab on the temporary file system:]
Example: 
Change from—
/dev/vx/dsk/rootdg/rootvol /dev/vx/rdsk/rootdg/rootvol / ufs 1 no-

Change to—
/dev/dsk/c0t0d0s0 /dev/rdsk/c0t0d0s0  / ufs   1     no       -
[Unmount the temporary file system, then check the file system:]
# cd /
# umount /a
# fsck /dev/rdsk/c0t0d0s0
[Install a new boot block:]
# /usr/sbin/installboot /usr/platform/`uname \
-i`/lib/fs/ufs/bootblk /dev/rdsk/c0t0d0s0
[Reboot in single-user mode:]
# reboot -- "-s"
[Update the disk ID:]
# scdidadm -R /dev/rdsk/c0t0d0
[Run vxinstall:]
# vxinstall
Choose to encapsulate the root disk.
[If there is a conflict in minor number, reminor the rootdg disk group:]
# umount /global/.devices/node@nodeid
# vxdg reminor rootdg 100
# shutdown -g0 -i6 -y

Where to Go From Here

For instructions about how to mirror the encapsulated root disk, see the Sun Cluster 3.1 Software Installation Guide.