SUMMARY: ufsdump and ufsrestore

> I need a simple script to dump a server mirrored with solstice disksuite
to
> tape, then demonstrate how to recover it to a new disk.
> 
> I'm dumping using this:
> 
> ufsdump 0uf /dev/rmt/0hn /
> ufsdump 0uf /dev/rmt/0hn /var
> ufsdump 0uf /dev/rmt/0hn /opt
> ufsdump 0uf /dev/rmt/0h /usr
> 
> The tape successfully rewinds at the end.
> 
> Then I tried this script to see what's on the tape:
> 
> ufsrestore tvf /dev/rmt/0hn > /root.txt
> ufsrestore tvsf /dev/rmt/0hn 2 > /var.txt
> ufsrestore tvsf /dev/rmt/0hn 3 > /opt.txt
> ufsrestore tvsf /dev/rmt/0h 4 > /usr.txt
> 
> The script crashed saying:
> 
> # ./fullrest.sh
> ioctl MTFSF: I/O error
> Mount volume 2
> then enter volume name (default: /dev/rmt/0hn) ^Cufsrestore interrupted,
> continue? [yn] n
> 
> The root.txt file contains the contents of /var
> 
> so obviously something's wrong.
> 
> I've tried fiddling with mt commands to no effect.  I've also tried
leaving
> off the "s" parameter and just trusting the order on the tape.
> 
> What am I doing wrong?

What I'm doing wrong is making things too complicated and using ufsrestore
incorrectly.

> ufsrestore tvsf /dev/rmt/0h 4 > /usr.txt

Should read:

ufsrestore tvfs /dev/rmt/0h 4 > /usr.txt

...but that's still too complicated.  I broke it into two scripts.


$ more fullback.sh
#!/bin/sh
echo "rewinding tape"
mt -f /dev/rmt/0 rewind
echo "backing up root"
ufsdump 0uf /dev/rmt/0hn /
echo "backing up var"
ufsdump 0uf /dev/rmt/0hn /var
echo "backing up opt"
ufsdump 0uf /dev/rmt/0hn /opt
echo "backing up usr"
ufsdump 0uf /dev/rmt/0hn /usr
echo "rewinding tape"
mt -f /dev/rmt/0 rewind

$ more fulltest.sh
#!/bin/sh
echo "moving tape to beginning"
mt -f /dev/rmt/0 rewind
echo "testing restoring root"
ufsrestore tvf /dev/rmt/0hn > /root.txt
echo "testing restoring var"
ufsrestore tvf /dev/rmt/0hn > /var.txt
echo "testing restoring opt"
ufsrestore tvf /dev/rmt/0hn > /opt.txt
echo "testing restoring usr
ufsrestore tvf /dev/rmt/0hn > /usr.txt
echo "rewinding"
mt -f /dev/rmt/0 rewind

Later on I can get fancy using "mt" with "afs" to position the tape.

Thanks to:

Darren Dunham, Alexandre Wanderley, Rich Kulawiec, Peter Stokes, Ric
Anderson, Kevin Gallagher, John Benjamins, Ray Brownrigg  (I think I got
everybody) 

and

Sal Serafino, who sent a long explanation (and sample scripts) of some of
the finer points of the two commands

and 

Cesare Tensi, who also pointed out that I could break my mirrors, back up
the detached concat/slices, then reattach and resync.

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