a problem with vrestore of a remote vdump

From: Giorgio Pastore <pastore_at_ts.infn.it>
Date: Wed, 21 Jul 1999 13:19:04 +0200

Hi all,

in a period of emergency (both our DAT units are out of order!) we have
performed some remote backup of AdvFs filesystems.

In particular, we have a filesystem /u on host a2 which is NFS mounted on host
a3 (where we have enough disk space).

We dumped /u with the command (on host a3):

rsh a2 /sbin/vdump -Cu -f - /u > u06_12

When we try to use the dump file to restore some files we get the following
diagnostic:

vrestore -i -f u06_12
vrestore: Date of the vdump save-set: Sat Jun 12 11:48:28 1999
vrestore: empty save-set
vrestore: nothing will be restored
Segmentation fault (core dumped)

Ok, ok, now, after checking in the archives, we understand that it would have
been better to use explicitly the -b 60 option in the vdump and a pipe into a
suitable dd.

However our question is: is there any way to restore the files in the
dump file ? And, in any case, what *exactly* was wrong with the way we did it?

We can add that a similar command for dumping a local filesystem worked
without problems:

vdump -Cu -f t06_12 /t

Thanks for any hints.

Giorgio Pastore



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Giorgio Pastore - Dipartimento di Fisica Teorica dell' Universita'
                  Strada Costiera 11, 34014 Trieste, Italy
  phone : + 39 040 2240242 fax: + 39 040 224601
  e-mail: pastore_at_ts.infn.it
                  pastgio_at_univ.trieste.it
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Received on Wed Jul 21 1999 - 11:22:56 NZST

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