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09-18-2001 04:47 AM
09-18-2001 04:47 AM
DAT tape data block size problem
I'm trying to recover some data that is on a DAT tape, but I'm getting the error "Tar: blocksize=2, directory checksum error"
I seem to remember this being a problem with using a tape created on a SUN workstation. However, I don't think this tape was created on a SUN workstation.
Any suggestions on how to restore some files on this tape?
Thank You
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09-18-2001 05:00 AM
09-18-2001 05:00 AM
Re: DAT tape data block size problem
do a dd
dd if=/dev/rm..... of=/tmp/f1 bs=10k
file /tmp/f1
If it shows tar file you can do
tar tvfb /dev/rmt/... 2
Or maybe it is other file format such us cpio.
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09-18-2001 05:04 AM
09-18-2001 05:04 AM
Re: DAT tape data block size problem
dd if=/dev/rm..... of=/tmp/f1 bs=10k count=10
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09-18-2001 05:14 AM
09-18-2001 05:14 AM
Re: DAT tape data block size problem
After trying this, I feel the tape may be blank.
After issuing the command, the system responds very quickly with no tape drive activity. The output file is only 1024 in size, so I don't think this works, or again, the tape is blank.
Thanks for the help though!
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09-18-2001 10:30 AM
09-18-2001 10:30 AM
Re: DAT tape data block size problem
Maybe this is 1024 bytes is only a tape header.
do
cat /tmp/f1
or od -xc /tmp/f1
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09-18-2001 12:06 PM
09-18-2001 12:06 PM
Re: DAT tape data block size problem
Does this make any sense?
I have been using the /dev/rmt/0m to view the archive list.
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09-18-2001 10:51 PM
09-18-2001 10:51 PM
Re: DAT tape data block size problem
DDS tapes have a internal header, and this mess refers, i think, that header has been not found.
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09-19-2001 03:37 AM
09-19-2001 03:37 AM
Re: DAT tape data block size problem
> message "ANSI standard label not yet
> implemented" ?????
> Does this make any sense?
This *probably* indicates that it is a fbackup(1M) tape. Use frecover(1M) or SAM to restore.
This will show the same message:
fbackup -i /etc/passwd -f - 2>/dev/null | head -1
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09-19-2001 04:08 AM
09-19-2001 04:08 AM
Re: DAT tape data block size problem
maybe i am wrong. I remember this message from some new tapes.
Glenn:
might you try to write the tape and tell us what have happen? Please.