How to Restore a Complete File System
Note -
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.
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If necessary, unmount the file system.
# umount /dev/rdsk/device-name
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Create the new file system with the newfs(1M) 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 destroy the wrong file system.
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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.
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Mount the new file system on a temporary mount point.
# mount /dev/dsk/device-name /mnt
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Change to the /mnt directory.
# cd /mnt
You have changed to the mount-point directory.
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Write-protect the tapes.
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Insert the first volume of the level 0 tape into the tape drive.
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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 would be prompted to load each tape in numeric order.
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Remove the tape and load the next level tape in the drive.
Always restore tapes starting with 0 and continuing until you reach the highest level.
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Repeat Step 7 through Step 10 for each level of dump, from the lowest to the highest level.
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Verify the file system is restored.
# ls
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Remove the restoresymtable file.
# rm restoresymtable
The restoresymtable file created by ufsrestore is removed.
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Change to another directory.
# cd /
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Unmount the newly restored file system.
# umount /mnt
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Remove the last tape and insert a new tape that is not write-protected in the tape drive.
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Use the ufsdump command to make a level 0 backup of 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 (the restored file system will appear to have changed since the previous backup).
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Mount the restored file system.
# mount /dev/dsk/device-name mount-point
The restored file system is mounted and available for use.
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Verify the restored and mounted file system is available.
# ls mount-point
Example--Restoring a Complete File System
The following example restores 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: Wed Jul 14 08:49:33 1999
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
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