How to Restore a Complete File System

You cannot use this procedure to restore root (/) or /usr. See "How to Restore the root (/) and /usr File Systems" for instructions on restoring these file systems.

1. Become superuser.

2. If necessary, unmount the file system.

   # umount /dev/rdsk/device-name

3. Create the new file system with the newfs command.

   # newfs /dev/rdsk/device-name

   You are asked if you want to construct a new file system on the raw device. Verify that the device-name is correct so you don't wipe out the wrong file system.

4. Confirm that the new file system should be created.

   newfs: construct a new file system /dev/rdsk/cwtxdysz: (y/n)? y

   The new file system is created.

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

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

6. Change to the /mnt directory.

   # cd mnt

   You have changed to the mount-point directory.

7. Write-protect the tapes.

8. Insert the first volume of the level 0 tape in the tape drive.

9. Use the ufsrestore command to restore the files on the tapes.

   # ufsrestore rvf /dev/rmt/n

   The level 0 dump is restored. If the dump required multiple tapes, you will be prompted to load the next tape.

10. Remove the tape and load the next tape in the drive.

    Always restore tapes starting with 0 and continuing until you reach the highest level.

11. Use the ufsrestore command to restore the file system.

    # ufsrestore rvf /dev/rmt/n

    The next level tape is restored. If the dump required multiple tapes, you will be prompted to load the next tape.

12. Verify the file system is restored.

    # ls

13. Remove the restoresymtable file.

    # rm restoresymtable

    The restoresymtable file created by ufsrestore is removed.

14. Change to another directory.

    # cd /

15. Unmount the newly restored file system.

    # umount /mnt

16. Remove the last tape and insert a new tape that is not write-protected in the tape drive.

17. Use the ufsdump command to back up the newly restored file system.

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

    You should always do an immediate backup of a newly created file system because ufsrestore repositions the files and changes the inode allocation.

18. Mount the restored file system.

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

    The restored file system is mounted and available for use.

19. Verify the restored and mounted file system is available.

    # ls /mount-point

Example--Restoring a Complete File System

In this example, the /export/home file system is restored.

# umount /export/home
# newfs /dev/rdsk/c0t3d0s7
newfs: construct a new file system /dev/rdsk/c0t3d0s7: (y/n)? y
/dev/rdsk/c0t3d0s7:	41040 sectors in 57 cylinders of 9 tracks, 80 sectors
      21.0MB in 4 cyl groups (16 c/g, 5.90MB/g, 2688 i/g)
super-block backups (for fsck -F ufs -o b=#) at:
 32, 11632, 23232, 34832,
# mount /dev/dsk/c0t3d0s7 /mnt
# cd /mnt
# ufsrestore rvf /dev/rmt/0
Verify volume and initialize maps
Media block size is 126
Dump date: Wed Nov 06 16:21:10 1996
Dumped from: the epoch
Level 0 dump of /export/home on pluto:/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/memos
Make node ./kryten/reports
Make node ./rimmer
Make node ./rimmer/sc.directives
Make node ./rimmer/tests
Make node ./rimmer/answers
Extract new leaves.
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