How to Restore the root (/) File System (Solstice DiskSuite/Solaris Volume Manager)

Use this procedure to restore the root (/) file systems to a new disk, such as after replacing a bad root disk. 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. Become superuser on a cluster node with access to the metaset, other than the node you want to restore.

2. Remove from all metasets the hostname of the node being restored.

   Run this command from a node in the metaset other than the node you are removing.

   # metaset -s setname -f -d -h nodelist

   -s setname

   Specifies the diskset name.

   -f

   Force.

   -d

   Deletes from the diskset.

   -h nodelist

   Specifies the name of the node to delete from the diskset.

3. Replace the failed disk on the node on which the root (/) file system will be restored.

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

4. Boot the node being restored.

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

     ok boot cdrom -s

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

     ok boot net -s

5. 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.

6. 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.

   ---

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

   # mount device temp-mountpoint

8. Use the following commands to restore the root (/) file system.

   # cd temp-mountpoint # ufsrestore rvf dump-device # rm restoresymtable # cd / # umount temp-mountpoint # fsck raw-disk-device

   The file system is now restored.

9. Install a new boot block on the new disk.

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

10. Reboot the node in single-user mode.

    # reboot -- "-s"

11. Replace the disk ID using the scdidadm(1M) command.

    # scdidadm -R rootdisk

12. Use the metadb(1M) command to recreate the state database replicas.

    # metadb -c copies -af raw-disk-device

    -c copies

    Specifies the number of replicas to create.

    -f raw-disk-device

    Raw disk device on which to create replicas.

    -a

    Adds replicas.

13. Reboot the node in cluster mode.

    1. Start the reboot.

       # reboot

       During this boot you might see an error or warning message, ending with the following instruction:

       Type control-d to proceed with normal startup, (or give root password for system maintenance):

    2. Press CTRL-d to boot into multiuser mode.

14. From a cluster node other than the restored node, use the metaset(1M) command to add the restored node to all metasets.

    phys-schost-2# metaset -s setname -a -h nodelist

    -a

    Creates and adds the host to the diskset.

    The node is rebooted into cluster mode. The cluster is ready to use.

Example—Restoring the root (/) File System (Solstice DiskSuite/Solaris Volume Manager)

The following example shows the root (/) file system restored to the node phys-schost-1 from the tape device /dev/rmt/0. The metaset command is run from another node in the cluster, phys-schost-2, to remove and later add back node phys-schost-1 to the diskset schost-1. All other commands are run from phys-schost-1. A new boot block is created on /dev/rdsk/c0t0d0s0, and three state database replicas are recreated on /dev/rdsk/c0t0d0s4.

[Become superuser on a cluster node other than the node to be restored.]
[Remove the node from the metaset:]
phys-schost-2# metaset -s schost-1 -f -d -h phys-schost-1
[Replace the failed disk and boot the node:]
ok boot cdrom -s
[Use format and newfs to recreate 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
# 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"
[Replace the disk ID:]
# scdidadm -R /dev/dsk/c0t0d0
[Recreate state database replicas:]
# metadb -c 3 -af /dev/rdsk/c0t0d0s4
# reboot
Press CTL-d to boot into multiuser mode.
[Add the node back to the metaset:]
phys-schost-2# metaset -s schost-1 -a -h phys-schost-1