> Manuel Bilderbeek wrote:
> >
> > Richard Gerrits wrote:
>
> > > Maybe because the dirty heads, the drive thinks there is no disk, so
> it
> > > doesn't do anthing.
> >
> > Ok, I'll try to clean them.
>
> OK, now I tried to clean the heads, but it doesn't make any difference.
>
> Now this is what Patrick Kramer mailed me:
> --------------
>
> I've been researching some more on this drive, and found the following:
> - If I'm lucky, I get a disk formatted with it (single sided and double
> sided). Sometimes it gives a disk error, when it's writing the
> bootsector, but after retrying it always seems to work)
> - I can save and load files on disks formatted with this drive most of
> the time. Sometimes I get Disk Offline messages. When I push a little
> bit to the drivehead, it works again.
> - Disks formatted with the 8245-drive cannot be read on other (MSX)
> diskdrives!
> - I can not read disks formatted on other drives. (I got this only once,
> I think)
> - If a disk (formatted on the 8245) works, it most of the time doesn't
> work anymore after ejecting and putting it back in. Pushing the head a
> little helps.
>
> Conclusions: -Drive works perfectly, but the head seems to be misaligned
> or something!
>
> Can anyone tell me how I can fix this? (And if my conclusion is right!)
>
Hi
Well, it could be that the heads are not pressed tight enough onto
the disk, thereby not transferring the magnetic info correctly. (Try
pressing play just a little bit on your walkman and you'll hear the effect:
high frequencies get lost).
This is hard to measure, but maybe if you have access to another
(broken) drive you can compare it.
Another thing is there may be 'speling' (what is the English
word...play?) in the horizontal movement of the heads, thereby not aligning
the tracks right every time (but maybe sometimes).
More possibilities: excentric movement of the disk (check the rim
while it's spinning). Maybe the sector 0 detector is not always working. I
don't know how this works in this drive, but in mine it's a magnet on the
spindle motor passing a hall switch. If it's optical in the 8245, maybe it's
dirty.
So far my ideas...good luck and let me know if you find out more.
Greetz,
Patrick
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