Re: [Networker] Recovering from a parially overwritten tape?

At 08:45 AM 2/25/2003 +0200, Dag Nygren wrote:

The problem is not that much Networker in this case.... Actually the
Networker tape format enables Networker to figure out what is on the tape.
But the problem is the tape drive and it's firmware. When you write the
tar-stuff on the tape you will generate an Logical EndOfTape mark
(actually two consequtive  EOF:s) after the data and no unmodified tape
drive will move the tape beyond this mark.


On any of the UNIX systems I use a "mt -f <path_to_no-rewind_drive> fsf 2"
will put you at the beginning of the original data.  What you can do with
it then, in the absence of a valid Networker tape label, I don't
know.  Perhaps you could use "dd" to copy a label from some other tape
(damaging a small bit more of the original data) and then copy what you've
got left to a new tape (again with "dd").  Then run scanner.  It should
find the synchronization blocks along the way, a bit like the "-k" switch
in "cpio".

At least, that's what I'd try...



         -crl
--
Chad R. Larson (CRL22)    chad AT eldocomp DOT com
  Eldorado
Computing, Inc.   602-604-3100
     5353 North 16th Street, Suite
400
       Phoenix, Arizona   85016-3228

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