7 Mar
2014
7 Mar
'14
12:02 a.m.
?
So I put in the RL8A disk controller (M8433) and connected the cable ?
to one of the drives at a time. Also connected the terminator on the ?
drive.
?
The first drive that I tested turned on the "READY" light, then ?
nothing more happened. I was able to open the drive immediately.
That does not sound right. You do mean 'ready' -- the one with the drive?
number on it? ?A Drive should only be 'Ready' when it's spun up to speed,?
the heads have loaded, and the head servo has locked.? ?
How much of this depends on a working controller (RL8A)?
Just about all of it. The drive needs a clock signl from the controller?
even to do things like check the motor is n't truning (which is necessary?
before the cover unlocks). If the clock is missing, the 'Fault' light?
comes on, but of course there are many other causes for this.
It's been some yers since I've been isnde an
RL, but I would start by?
checkign all the indicator bubls (you do not want to be getting false?
information becuase of a burned-out bulb!). Then, IIRC, the 'Fault' lamp?
is drven by the logic OR of a lot of signals (I seem to revcall active?
low signals and a '30 NADN gate here). If the Fault light is on, then see?
whic signal(s) is asserted, and trace back from there.
I will check the bulbs and then check what errors that have been asserted.
/Anders