SUMMARY: Restoring file systems

Samsoo Kang (
Sun, 15 Feb 1998 11:07:50 -0600 (CST)

Hi sun-managers,

Sorry for the late summary. Here is my original question.

> Hi sun-managers,
> I posted this yesterday but somehow I received the half of that. So, I
> send this again. If you received this already, please be patient.
> I use Solaris2.6 and Sun Sparc20. I had to re-install Solaris2.6 and I
> wanted to restore all file systems from the tape. Below is the task when I
> dumped file systems to tape.
> # ufsdump 0cf /dev/rmt/0n /dev/dsk/c0t3d0s0 # backup (1) /
> # ufsdump 0cf /dev/rmt/0n /dev/dsk/c0t3d0s3 # backup (2) /opt
> # ufsdump 0cf /dev/rmt/0n /dev/dsk/c0t3d0s4 # backup (3) /var
> # ufsdump 0cf /dev/rmt/0n /dev/dsk/c0t3d0s5 # backup (4) /usr
> # ufsdump 0cf /dev/rmt/0n /dev/dsk/c0t3d0s6 # backup (5) /usr/openwin
> # ufsdump 0cf /dev/rmt/0n /dev/dsk/c0t5d0s0 # backup (6) /home
> # ufsdump 0cf /dev/rmt/0n /dev/dsk/c0t5d0s1 # backup (7) /www
> # ufsdump 0cf /dev/rmt/0n /dev/dsk/c0t5d0s3 # backup (8) /scratch1
> # ufsdump 0cf /dev/rmt/0n /dev/dsk/c0t5d0s4 # backup (9) /scratch2
> I re-installed Solaris and restored the file sytems as below.
> # usfrestore rvf /dev/rmt/0n /dev/dsk/c0t3d0s0
> # cd /opt
> # usfrestore rvf /dev/rmt/0n /dev/dsk/c0t3d0s3
> # cd /var
> # usfrestore rvf /dev/rmt/0n /dev/dsk/c0t3d0s4
> For restoring /usr, I restored in another directory and copied all files.
> # cd /scratch1
> # mkdir usr
> # cd usr
> # usfrestore rvf /dev/rmt/0n /dev/dsk/c0t3d0s5
> # mv * /usr/
> # cd /usr/openwin
> # usfrestore rvf /dev/rmt/0n /dev/dsk/c0t3d0s6
> .
> .
> .
> # usfrestore rvf /dev/rmt/0n /dev/dsk/c0t5d0s4
> When I rebooted, it said there are some errors in devices
> /dev/dsk/c0t3d0s0, c0t3d0s5 ...). I continued with typing Ctrl-D. I could
> use CDE and log on root. I could send emails and I could use Netscape.
> However, I can't log on another user account. Even I made a new account
> but I could't log on with that account. I used fsck for root and /usr. It
> said there was a wrong superblock.
> Is the restoring procedure described above wrong?
> Thanks!
> Samsoo Kang

I got a couple of problems.

1. I didn' run installboot right after restoring file systems.
Here is the suggestion from Noli Aurea.


If you restore the / from tape you will need to intall the bootblock
for youl will not be able to boot your system.



2. Moving or copying files is not a good idea because /usr uses mv or cp
command. I thought this was O.K. if I do this in single-user mode.
But /usr is also mounted from booting. Here is the suggestion from
Martin Huber.

I would not replace /usr files of a 'living' system.
restore /usr to an empty partition
change the /usr entry in /etc/vfstab to the new partition
reboot the system. Now it uses the new /usr, and you can safely
rm -rf or newfs to the old /usr, copy the new partiton to the old one
and change /etc/vfstab back.


Thanks you Noli and Martin. Also others gave me similar suggestions.
Thanks Derek Eichele, Ning Zhang, Jim Harmon, Ramindur Singh, Ray Trzaska.

Samsoo Kang