> On Nov 25, 2015, at 04:17, Jules Richardson
> wrote:
>
> I *think* the track format for the S1410 is documented in the board manual,
> so if you can get raw track data then there's a chance that you might be able
> to make sense of it.
>
The sector format is described. but not in a great
On 11/25/2015 12:19 AM, Mark J. Blair wrote:
I have the drive spinning up happily, though track alignment is still a
crap shoot. I've tried dumping it with the MFM Reader/Emulator, and its
software could not make sense of the track format or CRC. I dumped a raw
MFM transitions file for more analy
No luck with the hard drive system on my CoCo 2 or 3, but I don't know if I
have it set up right. There's one cartridge with the SASI interface
(presumably...), and another with an Owl Ware Hard Disk BASIC 3 ROM and floppy
controller. I can make the hard disk LED blink with commands like DRIVE P
By the way, I found a stamp marking on the inside of the drive's front bezel
which I think represents the expected attitude of a Miniscribe drive. :-p
https://twitter.com/nf6x/status/669368721094238211
--
Mark J. Blair, NF6X
http://www.nf6x.net/
> On Nov 24, 2015, at 22:11, Glen Slick wrote:
>
> I did some support work for a product that used a 3.5-inch 20MB
> Miniscribe drive back in the mid-80's which had a failure mode where
> the track zero flag would rotate slightly out of position on the
> shaft. [...]
Very interesting!
I have
On Tue, Nov 24, 2015 at 9:45 PM, Mark J. Blair wrote:
>
> Anyway, I have it happily spinning up now after moving the interruptor vane
> on the outer stepper motor shaft a bit. It seems that the drive expects to
> see the track zero sensor trip some distance before the hard stop, but not
> too f
> On Nov 24, 2015, at 21:37, Chuck Guzis wrote:
> Maybe it's trying to tell you that it's really a brick? :)
>
> (For those who recall the Miniscribe debacle).
LOL!
After my experience with that 20M SCSI drive on my Amiga, I'm tempted to say
that they're all bricks. Some of them just pretend
On 11/24/2015 08:45 PM, Mark J. Blair wrote:
The hard drive is blinking an error code on its LED, reporting that
it cannot cover the track 0 sensor. Measuring the sensor pins with a
DMM while the drive is powered makes me believe that the optical
sensor itself is working correctly. Its output di
Hmm, now this is interesting. It occurred to me to try tacking a bit of
aluminum foil tape onto the interruptor blade to make it cover the optical
sensor earlier before hitting the hard stop. That made the drive seek
differently, and then report either "Track Zero sensor misadjusted" or "Seek
e
I forgot to mention that I got the LED error code table from a technical manual
for later Miniscribe drives, so it's possible that the blink pattern means
something different on the 3425. I think it's likely to be correct, though,
given the way the stepper is behaving at power up.
--
Mark J. B
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