🚀 go-pugleaf

On Thu, 14 Mar 1996, Tianbin Zhang wrote:

> Reg Braddock wrote:
> > 
> > I have a Pentium 90 with a Mitsumi CRMC FX-400 cd-rom drive and
> > am trying to install linux.  However, linux is not recognising
> > the cd-rom.
> > 
> > Has anyone else with this model of cd-rom drive been successful
> > in using it with linux?  I am particularly interested in the
> > necessary jumper configuration as I did not receive a manual
> > with the drive :(  The drive is on the secondary IDE channel,
> > not the soundcard - that much I do know.
> > 
> > Reg.
> 
> I have Mitsumi FX-400 cdrom (it is IDE cdrom drive). I had the
> same problem as yours when I tried to install linux. So I copied
> all the necessary files to DOS partition, and made the install.
> After that, I rebuilt the kernel. Now the kernel can recognize
> cdrom.
> 
> -- 
> 
>  (^_^). o O
> The cost of living is going up, and the chance of living is going
> down.
> 
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>                                 TIANBIN ZHANG
>  Department of Computer Science       | School: P.O. Box 2894 (zip: 30612)
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> 
> 

You don't have a manual? Did you steal it! :-)
Looking at the back of the drive you have:

        Line_out
                jumpers
                        IDE connector
                                PSU connector


        Jumpers: (one of ...)

                C  S  M
                S  L  A

                      MA = Master
                   SL = slave
                CS = cable select

If the drive is alone, it should be Master, is if is a pair it should be slave. CS should
not be used. Even the EIDE docs recommend against it, as different manufacturers got it
wrong (interpretation before the standard) and it needs a special cable. 

I have it as hdd, so my lilo.conf has a line like:

  append="sbpcd=0,ide1=serialize,hdd=cdrom"

I think it worked before I put anthing in there (the ATAPI recognises it as a cdrom, and my
ide1 chips may or may not be buggy), but the manual said not doing so is a risk.
The sbpcd=0 is to switch OFF the sbpcd/panasonic option, this allows the same kernel to
boot the other machine when there is no hd (paranoia or what).

I get /var/log/messages saying the ide1 is on irq-15 (automatically guessed) and the IO
port also. If you are not getting ANY such report, you might have the jumper wrong, cable
upside down, or PSU loose. If DOS recognises it, it's probably the jumper.

A second disk on the same cable will also be invisible if both are master or slave, so you
could move one of the first 2 disks over to have a look. hdparm only really tells you more
detail about what you already know.

	< /dev/cdrom closes the drive door

ls -l /dev/cdrom --> /dev/hdd

Graham

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