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SubjectRe: ASUS CD ROM 340 & 2.1.129+ dont work but work fine with 2.0.35+
please read very carefully or you don't read at all :)

hm i 've done some lot lot more testing and it's very very strange
not drive,drive is 100% ok :)

boots perfect in 2.0.35+ (sometimes reset drive)
halt in 2.1.129+

interesting is that workaround to boot in linux 2.1.129+
now it is enought to go in CLEAN dos 7.10 (win95 osr2)
on hard disk and then boot in linux with loadlin .

(By CLEAN dos I meant dos without ANY drivers=without
config.sys and autoexec.com ! )

this 'trick' just wont work if I try boot from floppy same dos 7.1
then loadlin .

Sounds very very stupid but that the way it is !

if you did'n noticed:
ASUS CD ROM 340 SUPPORT UDMA (my board do not suport udma, old vx)
and CD DRIVE work with every atapi driver in dos !

BTW I am sure that this is not hardware bug
if you still thinks so PLEASE read my first letter again !

in 2.0.35+ boots straight !
in 2.1.129+ halts when booted straight
but when I enter in clean dos (not needed atapi driver nor mscdex)
and do loadlin I can boot in 2.1.132 !

Again I repeat that work only from hard disk not floppy, and the
problem is only with kernel 2.1.129+ as I said with
2.0.35+ I DO NOT HAVE ANY PROBLEM !

thanks for reading :)

Zoran Davidovac

for more info, tests,
feel free to write: zdavid@rcub.bg.ac.yu



On Tue, 29 Dec 1998, Jens Axboe wrote:

> Alan Cox wrote:
> > > I had installed dos drivers for asus (but works with all atapi drivers ??
> > > it worked with my old atapi goldstarcd driver and ibmcd.sys driver in dos )
> > >
> > > and from dos i did:
> > > dir d: ; this only spins drive ( drive d is cdrom )
> > > c:\linux\loadlin vmlinuz root=/dev/hda4 ro vga=3
> > >
> > > and it booted in linux-2.1.132 fine and it works great under linux
> >
> > In other words the DOS driver contains some workarounds for the faults with
> > the drive. Given running that first then booting Linux works, it would be
> > a reasonable guess from your previous observations that this driver fakes a CD
> > change or similar to fix the drive problem.
>
> This is the second drive that has been reported to have this abnormal
> behavior. I'll be back in a couple of days and see if we can't get a
> decent workaround for this hardware bug.
>
> --
> * Jens Axboe <axboe@image.dk>
> * Linux CD-ROM Maintainer
> * "The only thing that interferes with my
> * learning is my education." -- A. Einstein
>


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