Blindingly fast disk I/O
Richard Foulk
richard at pegasus.com
Sat Feb 24 14:13:07 AEST 1990
In article <195 at zds-ux.UUCP> bjstaff at zds-ux.UUCP (Brad Staff) writes:
>I started this thread awhile back with the query about what SCSI and/or
>ESDI controllers and disks you all liked. Since email responses seem to
>have stopped, it is time to summarize the responses.
>
>SCSI controllers
>================
>Adaptec AHA-1540A/1542A - I got some favorable comments.
>WD FASST - I got one favorable, one mixed, and one negative comment.
>Mylex - I got one "I've heard it's good" comment.
>
Well I finally got my Mylex DC376 SCSI controller working properly just
yesterday. Took them months to get me a driver that worked. It was
working in (slow, 16-bit) Western Digital emulation mode prior to that.
It is reasonably fast. Mine has the minimum 1-meg of cache. Here are
some timings using Wren-VI (700 meg) drives, running ISC 2.0.2:
dd if=/dev/dsk/0s1 of=/dev/null bs=1k count=32768
time: 2.3u 34.9s 0:24 154%
and with a 32-meg file:
dd if=/tmp/junk of=/dev/null bs=1k count=32768
time: 2.3u 41.7s 0:39 112%
--
Richard Foulk richard at pegasus.com
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