[comp.sys.acorn] Help with Archimedes 2nd disc drive

julian@sideways.gen.nz (Julian Wright) (03/20/91)

A while ago I purchased a bare 3.5" floppy drive to attach to my external 
disc interface (the D A computers one). The interface worked fine with 
my BBC 5.25" drive, but when I attached the 3.5" drive (a TEAC FD 235F) 
all it would do is respond with "Drive Empty", even when a disc was 
present. I eventually solved this problem by changing a link over inside 
the drive.

My Dad, seeing the success I had had, decided to go a similar route, and 
to date has similar problems to the ones I had. He is using a locally 
produced interface, which _MY_ 3.5" drive works fine with, and a TEAC 
FD235 HF drive - looks identical, but is the 1.44Mb model (mine is the 
720Kb model). Dad's drive does not have the link that mine has, that I 
had to alter to get my drive to work (RY).

Dad has tried his drive on an IBM compatable, and it checks out OK. He 
has also tried another drive, a Toshiba, with similar problems.

But the really strange thing is that sometimes the drive will read a disc 
for a while, and then suddenly decide to stop... you can be in the middle 
of cataloging disc "System" when there is a pause followed by "Please 
insert disc "System"... subsequent attempts to catalogue the disc may or 
may not be successful. Also, the FileCore regularly crashes with an 
Address Exception followed by a "Filecore in Use" error - and this is the 
first disc to be catalogued since a cold reset!

What on earth is going on here? Has anyone else had problems adding their 
own second drives to the Arc? How can a disc drive cause the Filecore to 
crash so regularly - on the first disc, in the _middle_ of a read?

I haven't even begun to list the problems we have had attempting to make 
these drives _write_ anything...

    Cheers, Julian.