Re: ontape back-up/restore to remote device

In article <34650EED.7ECD@netcomuk.co.uk>, Neil Truby <ntruby@netcomuk.co.uk> writes >John Miller wrote: >> >> Neil: >> >> On a restore the tape is open, read to verify that it has the correct >> information, >> closed to reposition at the begin of the tape, then re-openned. If the >> close >> did not get completed by the tape device by the time the open is issued any >> subsequent reads fail. There is an easy solution to this(if I remeber my >> shell script): >> >> 1. Create a shell script (lets say /work/bin/tape_wait.sh) >> #!/bin/sh >> /usr/bin/sleep 60; rsh $* >> >> 2. now in you ontape environment set DBREMOTECMD >> to /work/bin/tape_wait.sh >> >> Hope this helps, >> John Miller > >Thanks John. I had subsequently worked out that the problem was the >/dev/rmt/0n (no rewind) device. It works fine with /dev/rmt/0. >Informix tech. support told me that this was tough - ie , even on a 40G >DLT tape, you can only have one OnLine archive, and it must be the first >archive on the tape. Correct, Ontape a) open the tape device b) writes a tape header to the device c) close the device....AND EXCPECTS IT TO REWIND THE TAPE ONCE IT IS CLOSED I.E. A REWIND DEVICE RATHER THEN A NO-REWIND DEVICE. d) opens the tape. e) reads the header from the tape (THIS WILL FAIL ON A NO-REWIND DEVICE) f) writes the archive to the tape. > >I'm not at work, so I can't look up DBREMOTECMD, which I've never used! > >Regards >Neil -- David Williams