5 Sep
2012
5 Sep
'12
9:30 p.m.
Hollandia at ccountry.net wrote:
Hi again,
<snip>
I don't know who has encountered the Commodore 1541 drive. Thise who have
will recall the hammering noise it made at turn-on and also when it
encountered a difficulty with a disk it was reading.
The drive under consideration is, I think, doing the same thing. It
periodically makes a noise that sounds like an impact. This noise is being
encountered with increasing frequency; I wonder if the the drive is headed
for a failure. I have other drives I can put in its place, if need be.
I don't understand the reference to "popcorn"...what is the meaning here?
Thanks,
Kurt
Hi Kurt,
I'm not sure, but I think loss of servo on a track will result in the
drive attempting to recalibrate by seeking the lowest density track
to re-acquire the servo track clock. This results in the heads
retracting to a know area, possibly overshooting track 0 and hitting the
hard stop.
Like I said, I'm not sure, But others on this group can identify the
fault, Since some luminaries here have designed and/or worked on hard disk
firmware and hardware.
-jimd