Veritas-bu

[Veritas-bu] bpverify(1) is a joke, is it possible to restore to /dev/null?

2006-05-17 09:44:10
Subject: [Veritas-bu] bpverify(1) is a joke, is it possible to restore to /dev/null?
From: Len.Boyle AT sas DOT com (Len Boyle)
Date: Wed, 17 May 2006 09:44:10 -0400
Hello Justin, 

>From what you have shown us it looks like a bad tape. But It would be good to 
>try to read the tape using an util that is not netbackup. Like tcopy or dd, 
>etc.

A few years ago, we had a problem with a restore of an active directory machine 
that showed up as an i/o error. It turned out to be an error in netbackup when 
the restore data for the active directory  was over fixed size. I think it was  
2gig. 

So it is always good to have a second software view of things. 

len 

-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu [mailto:veritas-bu-admin 
AT mailman.eng.auburn DOT edu] On Behalf Of Justin Piszcz
Sent: Wednesday, May 17, 2006 9:11 AM
To: Paul Keating
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] bpverify(1) is a joke, is it possible to restore to 
/dev/null?

The error is a bad tape.

05/08/2006 08:34:22 - mounting EI0456
05/08/2006 08:35:00 - mounted EI0456; mount time: 0:00:38
05/08/2006 08:35:00 - positioning EI0456 to file 1
05/08/2006 08:35:00 - positioned EI0456; position time: 0:00:00
05/08/2006 11:51:32 - Error bptm (pid=5534) cannot read image from
media id EI0456, drive index 0, Input/output error

The restoration was attempted 2-3 times with two different tape
drives, it died in the same spot on the same tape both times.

Justin.

On 5/17/06, Paul Keating <pkeating AT bank-banque-canada DOT ca> wrote:
> What was the specific I/O error?
> Sounds like the tape is fine and the restore was running fine and
> something puked on the client side of things.
>
> ie. a client I/O, rather than a tape I/O error.....I think there are
> several of these documented in the troubleshooting guide.
>
> Did the verify run on the same physical *drive* as the restores?
>
> Paul
>
> --
>
>
> > -----Original Message-----
> > From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> > [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of
> > Justin Piszcz
> > Sent: May 15, 2006 7:11 AM
> > To: veritas-bu AT mailman.eng.auburn DOT edu
> > Subject: [Veritas-bu] bpverify(1) is a joke, is it possible
> > to restore to /dev/null?
> >
> >
> > All,
> >
> > I ran a restore last week which was on three tapes, on the second tape
> > it failed due to an I/O error, I repeated the restore and the same
> > result occurred.
> >
> > I ran bpverify on the backup image ID and it said everything was OK,
> > obviously this is not a good way to test a tape's integrity!
>
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