6 Nov
1999
6 Nov
'99
9:39 a.m.
At 05:42 PM 11/6/99 -0500, Tim Shoppa wrote:
Were these 1568's used previously on this Dilog
controller? If not, they're
probably configured for use on a PC-clone, and have the sector length set
on the "short" side. The PLO in the Dilog isn't locking onto successive
blocks, and as a result it's reading only one sector per revolution.
No, they were previously used on the Sigma RQ11D (aka a Webster WQESD). In
the screen that comes up with the on-board formatter the drive claims it is
in "hard sectored" mode (which the Dilog stuff I got from Dilog reccomends)
The cure is to set the sector length on the 1568's
to be a bit longer.
You'll lose a little bit of capacity (and will have to reformat), but it'll
be able to read more than one sector per revolution.
This makes sense and I did it originally for the Sigma (went from 54
sectors to 53 sectors) so perhaps an interesting question is whether or not
it is really running in hard sectored mode or not.
How about
Q-bus priority?
No, if things are slow with the controller running the
built-in exerciser
(which *don't* move disk data over the Q-bus) it's not a Q-bus problem.
It's a drive problem.
Good point.
--Chuck