Example--Restoring a Complete File System

The following example shows how to restore the /export/home file system.

# umount /export/home
# newfs /dev/rdsk/c0t3d0s7
newfs: construct a new file system /dev/rdsk/c0t3d0s7: (y/n)? y
/dev/rdsk/c0t3d0s7:	410400 sectors in 270 cylinders of 19 tracks, 
80 sectors
200.4MB in 17 cyl groups (16 c/g, 11.88MB/g, 5696 i/g)
super-block backups (for fsck -F ufs -o b=#) at:
 32, 24432, 48832, 73232, 97632, 122032, 146432, 170832, 195232, 219632,
 244032, 268432, 292832, 317232, 341632, 366032, 390432,
# mount /dev/dsk/c0t3d0s7 /mnt
# cd /mnt
# ufsrestore rvf /dev/rmt/0
Verify volume and initialize maps
Media block size is 126
Dump   date: Sat Jul 14 08:49:33 2001
Dumped from: the epoch
Level 0 dump of /export/home on earth:/dev/dsk/c0t3d0s7
Label: none
Begin level 0 restore
Initialize symbol table.
Extract directories from tape
Calculate extraction list.
Warning: ./lost+found: File exists
Make node ./kryten
Make node ./kryten/letters
Make node ./kryten/reports
Extract new leaves.
Check pointing the restore
extract file ./kryten/.cshrc
extract file ./kryten/.login
extract file ./kryten/b
extract file ./kryten/memos
extract file ./kryten/letters/b
extract file ./kryten/letters/letter1
extract file ./kryten/letters/letter2
extract file ./kryten/letters/letter3
extract file ./kryten/reports/reportA
extract file ./kryten/reports/reportB
extract file ./kryten/reports/reportC
Add links
Set directory mode, owner, and times.
Check the symbol table.
Check pointing the restore
# ls
# rm restoresymtable
# cd /
# umount /mnt
# ufsdump 0ucf /dev/rmt/0 /export/home
                    .
                    .
                    .
# mount /dev/dsk/c0t3d0s7 /export/home
# ls /export/home

How to Restore the root (/) and /usr File Systems

1. Become superuser or assume an equivalent role.

2. Add a new system disk to the system where the root (/) and /usr file systems will be restored.

   For a detailed description about adding a system disk, refer to Chapter 33, SPARC: Adding a Disk (Tasks) or Chapter 34, IA: Adding a Disk (Tasks).

3. Mount the new file system on a temporary mount point.

   # mount /dev/dsk/device-name /mnt

4. Change to the /mnt directory.

   # cd /mnt

5. (Optional) Write-protect the tapes for safety.

6. Restore the root file system.

   # ufsrestore rvf /dev/rmt/n

   The level 0 tape is restored.

7. Remove the tape and load the next level tape in the drive.

   Always restore tapes starting with dump level 0 and continuing from lowest to highest level.

8. Continue restoring as needed.

   # ufsrestore rvf /dev/rmt/n

   The next level tape is restored.

9. Repeat Step 7 and Step 8 for each additional tape.

10. Verify the file system is restored.

    # ls

11. Remove the restoresymtable file.

    # rm restoresymtable

    The restoresymtable file that is created and used by the ufsrestore command to check-point the restore is removed.

12. Change to the root (/) directory.

    # cd /

13. Unmount the newly created file system.

    # umount /mnt

14. Check the new file system.

    # fsck /dev/rdsk/device-name

    The restored file system is checked for consistency.

15. Create the boot blocks on the root partition.

    # installboot /usr/platform/`uname-i`/lib/fs/ufs/bootblk /dev/rdsk/device-name

    For more information, see installboot(1M).

    For an example of using the installboot command on a SPARC based system, see "SPARC: Example--Restoring the root (/) File System". For an example of using the installboot command on an IA based system, see "IA: Example--Restoring the root (/) File System".

16. Insert a new tape in the tape drive.

17. Back up the new file system.

    # ufsdump 0uf /dev/rmt/n /dev/rdsk/device-name

    A level 0 backup is performed. Always do an immediate backup of a newly created file system because ufsrestore repositions the files and changes the inode allocation.

18. Repeat steps 5 through 16 for the /usr file system, if necessary.

19. Reboot the system.

    # init 6

    The system is rebooted.