How to see files backed up on tape using dd command Post: 302492404

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Operating Systems Linux Red Hat How to see files backed up on tape using dd command Post 302492404 by ahmerin on Monday 31st of January 2011 09:26:49 AM

01-31-2011

Registered User

How to see files backed up on tape using dd command

Hi all,

I need some help...

- I have two servers - serverA and serverB.
- ServerB has a tape drive
- I took a backup of some files on serverB on to tape drive on serverA.
- I used the following command:

serverB> tar cvfb - 20 ./<file> | ssh <serverA> 'dd of=/dev/nst0 bs=20b'

- I repeated the same command for lots of other database files...
- Above works fine and gives no errors
- I went to serverA, which has tape drive, and rewind the tape, using

'mt -f /dev/nst0 rewind' commnd

- Now, I want to see contents on the tape but dont know how Smilie

- I thought tar tvf /dev/nst0 will do the trick but it gives input/output errors - there are no errors when files were copied to the tape.

- I now realise that command used to put files on tape was 'dd' and now I do not know how to display the contents of backup using dd command... I do not want to restore files to see if they backed up OK... I just want to see files are in the tape... I have 6TB of files to check Smilie

Any help from you will be appreciated.

Regards
Ahmerin

ahmerin

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LEARN ABOUT REDHAT

amverify

AMVERIFY(8)						      System Manager's Manual						       AMVERIFY(8)

NAME

       amverify - check an Amanda tape for errors

SYNOPSIS

       amverify config [ slot [ runtapes ] ]

DESCRIPTION

       Amverify  reads	an  Amanda  format  tape  and makes sure each backup image can be processed by amrestore and, if possible, the appropriate
       restore program (e.g. tar).

       Amverify runs amrestore on each file of the tape and pipes the output to a restore program (if available) with an option to create a  cata-
       logue of the backup.  The catalogue itself is discarded.  Only the success or failure of the operation itself is reported.

       If  the	backup image cannot be processed by the restore program, e.g. if it was written on a different operating system, the image is sent
       through dd to /dev/null.  This still determines if the tape is readable, but does not do any internal consistency check on the image.

       If config is set up to use a tape changer, the slot argument may be used to choose the first tape to process.  Otherwise, the current  slot
       is used.

       The runtapes configuration parameter determines how many tapes are processed unless it is specified on the command line.

       See the amanda(8) man page for more details about Amanda.

AUTHOR

       Axel Zinser <fifi@icem.de>

SEE ALSO

       amrestore(8), amanda(8), amverifyrun(8)

																       AMVERIFY(8)