If the SCSI bus reset has rewound the tape and damaged the label, you
can detect this without using scanner.  There is a parameter in the
jukebox definition that tells it to verify the label each time a tape is
unloaded.  If you view the details of the jukebox, the parameter you're
looking for is "Verify label on unload".  When this is enabled and NW
finds a tape with a label that is unreadable, it will write to the
messages file something like this:

NetWorker media: (info) expected volume '000213' got 'NULL'.

It also will mark all the savesets on that tape as "suspect".  If you
can monitor the log in some fashion (script, etc), you can detect when a
tape is damaged as soon as it happens.  

Be aware, however, that this will find any error that causes problems
reading the label.  So, bad tapes or tape drive problems can also
trigger the error.

Enjoy.
Teresa




-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Dag Nygren
Sent: Tuesday, October 31, 2006 9:30 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Verifying data written

> Good day list
>  
> Is there any way/script I can run to check the integrity of my backups
> that completed?
>  
> I had a SCSI bus reset problem recently which made my backups useless,
> after showing that they completed successful.

scanner /dev/xxxx
will verify that the tape is a valid Networker tape and will
tell if there are physical or logical problems on the tape.
It will NOT verify the actual data though.

In your case it will do nicely though as the SCSI bus reset will
generate a tape without a valid Networker tape label.

Best
Dag

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