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Operating Systems AIX How to list files in AIX 3.2 mksysb backup tape Post 302213823 by shockneck on Friday 11th of July 2008 05:53:58 AM
Old 07-11-2008
Quote:
Originally Posted by victorcheung
[...]
# tar -tvf /dev/rmt0
tar: 0511-169 A directory checksum error on media; -559038737 not equal to 1726.[...]
If you accessed the data at the right position and the tape and/or the data on the tape is not damaged itself I could think of a problem with the tape block size. If the person who did the backup was nice, he put it on the tape label. If there is not information about the block size I would configure the tape to use variable block size (0).
Furthermore you could try the -i parameter of tar to skip broken files or use pax that can read tar format but is more forgiving when it comes to archive errors. Also gnu tar from the AIX Linux Toolbox might be worth a try.
 

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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)
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