vdump nfs mounts results in files containing only nuls

From: <Shaun.Racine_at_intier.com>
Date: Tue, 11 Feb 2003 17:22:53 +0000

HI all,

Compaq Tru64 UNIX V5.1 (Rev. 732)
Patch kit: T64V51AS0002-20001204 OSF510

We use vdump to backup all our system, including nfs mounted attached
storage (NetApp).

I have found when using vrestore, some restored files from the nfs system
are just full of null characters (found using od -a), although the file
itself is the correct length. The majority of files restore OK - but as
you guys and gals know majority is not good enough for a production system
=)

At first I imagined a problem with the tape media, but subsequent testing
vdumping to an ordinary local disk file gave the same results. It also
does not appear to be when a file is open during backup, because files
which I know are not open contain nulls, but other files which were likely
to be open can be restored OK.

I thought vdump was able to backup any mounted system, including nfs.

Has anyone come across the same problem with vdump/vrestore?
Should I adjust my backup strategy? - suggestions welcome!

Best regards / Mit freundlichen Grüßen

Shaun Racine
Systems Development Manager
Intier Automotive Interiors Ltd
tel: +44 1622 852326 / 859491
fax: +44 1622 850587
email: shaun.racine_at_intier.com
Received on Tue Feb 11 2003 - 17:24:53 NZDT

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