Copying from one tape to another tape
2003-09-19 14:49:28
Greetings! I'm having a bit of difficulty and I haven't yet found any
info in the list archives that has helped me to solve this problem.
I'm currently attempting to copy the contents of a 35GB DLT-IV
(DLT7000) tape over to an SDLT-320 tape. The DLT-IV tape is not readable
on my SDLT drive, and contains some old Amanda backups that I would like
to be able to access after we get rid of our DLT-IV drive.
I am attempting to copy from one tape to another using dd, and getting
the following results:
[15:37:44]root@anubis:/local0/tmp# dd bs=32k if=/dev/rsa1 of=/dev/rsa0
1+0 records in
1+0 records out
32768 bytes transferred in 1.628442 secs (20122 bytes/sec)
The return is instantaneous, and obviously this copy is not working. I
no longer have the amanda logs or index files for this tape.
Are there other options I could perhaps try with dd?
I have managed to extract backup images using amrestore, although I do
need to grab them by individually specifying the host and disk,
otherwise it will repeatedly extract and overwrite the first image on
the tape like so:
[15:46:05]root@anubis:/local0/tmp# amrestore /dev/rsa1
amrestore: 0: skipping start of tape: date 20030303 label MONTHLY002
amrestore: 1: restoring atlas._var.20030303.0
gzip: stdin: decompression OK, trailing garbage ignored
amrestore: 2: skipping start of tape: date 20030303 label MONTHLY002
amrestore: 3: restoring atlas._var.20030303.0
gzip: stdin: decompression OK, trailing garbage ignored
amrestore: 4: skipping start of tape: date 20030303 label MONTHLY002
amrestore: 5: restoring atlas._var.20030303.0
With all of the backup images successfully restored, is there a way that
I can use amflush to copy these to a different tape, even though I don't
have the index files and logs?
Could I use amrestore -r and then dd the raw output onto the new tape?
Thanks for any ideas/assistance that anybody can provide!
--
Joshua D. Bello <josh AT nextrials DOT com>
Systems Administrator
Nextrials, Inc. +1-925-415-8957
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