WD1007V-SE2 controller -- 15Mb/s or not? Wren VI -- 650MB or 1.1GB?
Larry Campbell
campbell at redsox.bsw.com
Sun May 27 01:50:14 AEST 1990
I'm using a CDC/Imprimis/Seagate Wren VI on a WD1007V ESDI controller. The
controller claims to be a 15Mb/s board. Recently someone (sorry, forgot
who) in this group said that if you had a 15Mb/s controller, you could jumper
the drive for 93 sectors/track, raising its capacity from about 650MB to
about 1.1GB (actually they said 770MB, but 1630 cyl * 93 sec/trk * 15 heads
comes out to about 1.1GB).
Now, the drive *does* have a jumper labelled 93 sectors/track. However, I
had originally jumpered the drive for 54 sectors/track (the other choices are
53, 35, and 34). At 54 sectors/track the thing ran *ridiculously* slowly; a
low level format would have taken (if I had waited for it to finish) over
122 hours!
I called Western Digital and was told that the controller "isn't fast enough"
to run at 54 sectors/track, and if I jumpered the drive for 53 sectors/track
it would run at a reasonable speed. Well, I was skeptical, but I tried it,
and indeed it now runs like a champ. Very nice drive.
Now, if the WD1007V can't hack 54 sectors, I suspect it *certainly* can't
hack 93.
So here (finally) is my question. Is the WD1007V a bozo controller, or am
I doing something wrong? Can I actually use 93 sectors/track on my drive,
and if I need a new controller to do so, which controller will work?
--
Larry Campbell The Boston Software Works, Inc.
campbell at redsox.bsw.com 120 Fulton Street
wjh12!redsox!campbell Boston, MA 02109
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