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- Path: sparky!uunet!elroy.jpl.nasa.gov!news.claremont.edu!nntp-server.caltech.edu!SOL1.GPS.CALTECH.EDU!CARL
- From: carl@SOL1.GPS.CALTECH.EDU (Carl J Lydick)
- Newsgroups: comp.os.vms
- Subject: Re: Backup question
- Date: 30 Dec 1992 12:22:48 GMT
- Organization: HST Wide Field/Planetary Camera
- Lines: 26
- Distribution: world
- Message-ID: <1hs4aoINNnqs@gap.caltech.edu>
- References: <29846@castle.ed.ac.uk>
- Reply-To: carl@SOL1.GPS.CALTECH.EDU
- NNTP-Posting-Host: sol1.gps.caltech.edu
-
- In article <29846@castle.ed.ac.uk>, ercn50@castle.ed.ac.uk (Lifesupport) writes:
- [Description of the "I've accidentally overwritten my backup tape" problem
- deleted]
-
- OK. First of all, everything depends on what kind of tape you're talking
- about. If it's a TK50 or TK70, you're out of luck. If it's a 9-track, what
- you can do is:
- 1) Mount the tape
- /FOREIGN/BLOCK=big_block_size/REC=save_set_record_size
- 2) Use SET MAG/SKIP=FILE=whatever to position near the double
- end-of-file mark that signals logical end-of-tape;
- 3) Use DUMP or equivalent to skip over the end-of-tape mark;
- 4) COPY the tape to disk or to a file on a tape that's been mounted as
- a FILES-11 volume;
- 5) Use dump to skip the end-of-file and beginning-of-file labels on
- the tape, so you're at the beginning of the next saveset;
- 6) Repeat steps 4 and 5 until you've recovered all the data.
- If this doesn't make sense to you, e-mail me for more details.
- --------------------------------------------------------------------------------
- Carl J Lydick | INTERnet: CARL@SOL1.GPS.CALTECH.EDU | NSI/HEPnet: SOL1::CARL
-
- Disclaimer: Hey, I understand VAXen and VMS. That's what I get paid for. My
- understanding of astronomy is purely at the amateur level (or below). So
- unless what I'm saying is directly related to VAX/VMS, don't hold me or my
- organization responsible for it. If it IS related to VAX/VMS, you can try to
- hold me responsible for it, but my organization had nothing to do with it.
-