I did a "boot -r" and the drive showed up fine, creating these
device files in /dev:
rst2
rst26
and their `n' (non-rewinding) counterparts. What is the difference
between rst2 and rst26?
The answer to the above is simple, if you look in the right place.
First, I needed to notice that /dev/*rst* are all links to /dev/rmt/,
and the files in the latter directory follow the following convention:
/dev/rmt/[0- 127][l,m,h,u,c][b][n]
where l,m,h,u,c specifies the density (low,
medium, high, ultra/compressed), b the optional
BSD behavior (see mtio(7)), and n the optional
no rewind behavior. For example, /dev/rmt/0lbn
specifies unit 0, low density, BSD behavior, and
no rewind.
/dev/rmt/0ub seems to be the one for my drive (I have evidence from
another source for this).
Thanks to
Mike Raffety <mike_raffety@il.us.swissbank.com>
bharrell@digit.com (Bruce L. Harrell)
for the hints.
Still no answer for this:
Also, I noticed a big difference in speed (10x) between specifying, to
tar, no blocking factor and one of 500--the latter was much faster.
What is the optimal blocking factor (for dump and tar) for this tape
drive?
Kevin Layer, Franz Inc. 1995 University Avenue, Suite 275
layer@Franz.COM (internet) Berkeley, CA 94704 USA
Phone: (510) 548-3600 FAX: (510) 548-8253
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