hurf@tcgould.tn.cornell.edu (Hurf Sheldon) (01/31/89)
Reply-to: hurf@tcgould.tn.cornell.edu (Hurf Sheldon)
I am trying to use dd over the net between two Ultrix
systems. In one case a 2.3 system to a 2.0 system,
in another case a 2.0 system to a 2.0 system and I have
not been able to get it working satisfactorily.
In both cases I am going from a tk50 to a tk50
The most successful incantation has been:
'rsh remotehost dd if=/dev/nrmt0h ibs=10240 obs=1024 | \
dd ibs=1024 of=/dev/nrmt0h obs=10240'
dd runs and reports the correct blocks in& out but the data
on the target drive is munged - the first set of 20 1024 blocks
look ok but when doing larger files (7 records in
70 records out
70 records in
7 records out)
things seem to get skewed after the first record.
BTW- we are trying to copy a 'setld' format tape and using
the 'files=n' option doesn't work but just reinvoking
the command line n times does. (Why we go to/from 'nrmt0h')
I was also successful doing this from a bsd4.2 reel drive
to an Ultrix1.2 tk50 a long time ago.
The next thing I was going to try was to add wbuf=0 to both
halves of the command line but at that very moment the target
drive choked on a tape so while we wait for the DEC man we
solicit ideas.
Please respond directly to me at ionvax if possible.
Thanks,
hurf
--
Hurf Sheldon Network: hurf@ionvax.tn.cornell.edu
Lab of Plasma Studies Bitnet: hurf@CRNLION
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I sold my Elan, got a job in science; Now, no one takes me seriously.