Re: [cbm4linux-users] XMP1541 parallel Problems

[Michael K. <mic...@pu...>]

Andreas,

> Infact with SJD I have noticed several problems that are all on the behal=
f of
> SJD though. E.g.
>
> # cbmctrl status 8
> ............................................
> # cbmctrl dir 8
> cbmctrl: dir: No such device

Uhm, dumb question: does a SJD-equipped drive work with a stock 64
kernel?

> Since here it doesn't even respond to standard IO commands correctly I wo=
nder
> how at all it works out :) ... will check closer whenever I get my JD128
> back.
>
> Plain JD works rather well, just doesn't seem reliable. Actually, as I no=
ted
> on a previous mail, JD+XMP-Cable seems slightly faster than plain
> ROM+XMP-Cable on SERIAL (1 and2) transfers.

That's probably just because of the higher stepper frequency.
No idea why it should be less reliable, though.

> Trying JD+XMP with parallel modes caused the same type of error behaviour=
 I
> used to have. Enabling -w warp mode completely bugs out. error 23 all ove=
r
> the place and no sector is transferred ok.
>
> Didn't take the time to check with all other serial modes yet.
> Whenever I feel happy and my ordinary (Warp&Parallel) transfers works, I =
may
> start to dig around why the stuff doesn't work with SJD especially.
>
> Joe, regarding my previous posts, is there anything else I could try, or =
have
> you heard of similar problems before ?

> I am pretty sure I tried about anything possible, without even disturbing=
 the
> errors or influencing the transfer at all :(

How about parallel turbo?

> Even under heavy system load the transfer goes smooth for quite a few tra=
cks,
> bugs out, continues for some tracks, bugs out ... etc.
> It does the whole process slower though.

That's normal, since all user-space protocols rely on busy-loops.

> The errors come up on the same disk
> on completely random locations, cables are tripple checked and everything=
=2E
> All this connected with the adaptor from your cable shop I assume. (got i=
t
> from Protovision ppl) --- just hardwire - hacked to become XM instead of =
XE.
>
> ANY guess ??? I'll try anything --- still regarding myself as someone kno=
wing
> a little about drives... :)

Ok, wild guess: Is your drive speed ok? I hacked up a small drivemeter a
while ago (hey, even with GUI!):

http://a98.shuttle.de/~michael/rpm1541

(both binary + source, needs GTK+-1.2)

It will trash track 41, so be sure to use a scratch disk.

Good luck,

--=20
Michael

"Nicht alle Steuerelementpfade geben einen Wert zur=FCck"
               -- Microsoft C/C++ Version 12.00.8186