Exabyte and file positioning...
Robert E. Toense
toense at cplxsys.ncsl.nist.gov
Thu Jun 7 04:54:17 AEST 1990
There are three possible conditions for writing files on an Exabyte drive:
1) Beginning of tape,
2) Immediately following a write (no intervening motion), and
3) Immediately following writing a filemark (no intervening motion).
One of these conditions must exist or the write will fail. In the
scenario described,
tar xf /dev/nrst0
mt -f /dev/nrst0 rew
mt -f /dev/nrst0 fsf 1
dump 4dsbf 54000 6000 100 /dev/nrst0 /dev/...
the dump does not follow one of the three conditions. Exabyte drives DO
NOT work like 1/4" and 1/2" drives with regard to tape positioning and
writing. Check the Exabyte manual for further discussion.
Robert E. Toense
(toense at cplxsys.ncsl.nist.gov)
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