Sun-Managers:
This was a case of RTFM, but not realizing that compression required
a special option to enable.
Chuck Foley said it best:
> You should be using /dev/rmt/0c to write with compression
> turned on....The man page (Solaris 2.3) for "st" indicates this
> (near the end, there is a chart of density specifications and
> the density actually written for different drive types.
-- Bob
Thanks to:
szgyula@skysrv.pha.jhu.edu (Gyula P. Szokoly)
jpl@allegra.att.com (John P. Linderman)
cfoley@arsenic.cray.com (Chuck Foley)
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My original Posting:
Sun-managers,
There has been a lot of discussion about tape drives of late, but
now I have a query of my own. We have two Exabyte 8505 8mm tape
drives connected to a SPARCserver 1000 (6 processors, Solaris 2.3)
which are claimed to have a ~10 Gb capacity using built-in hardware
compression. However, we have not been able to store more than
~5 Gb per tape (this makes no difference whether the tape is new
or old [I've seen the report about tape drives using the lower
density instead of the higher one for used tapes, but we're seeing
this behavior with new tapes as well!]).
A 'probe-scsi-all' shows the drives as '8505.....', but we see
8500 behavior. We are using '/dev/rmt/0h' (not 'l' or 'm'). Has
anyone seen/solved this problem?
Thanks in advance, and of course I'll summarize.
-- Bob
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Robert D. Worsham (Bob) voice: (617) 547-6207
email: worsham@aer.com fax: (617) 661-6479
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