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Re: mounting CD-RW on Fedora Core 2



I had this problem -- I just added the following to my grub.conf:

        kernel /boot/vmlinuz-2.6.8-1.521 ro root=LABEL=/ hdc=ide-scsi rhgb
quiet 

This makes it work: I found the fix searching on the web.

HTH!



--- James Wilkinson <james westexe demon co uk> wrote:

> John Que wrote:
> > I have a SAMSUNG CD-RW (52x24x52).
> > Previuosly I had used it successfully in RedHat 9.
> > If I remember well , I added in grub.conf something like hdc=ide-scsi
> > (It was quite a time ago).
> This is no longer needed.
> 
> > Now I had recently upgradced to Fedora Core 2.
> > When booting Fedora,I see
> > in kernel log  that the SAMSUNG CD-R is being recognized as hdc.
> > 
> > Should I add something in grub.conf ?
> No.
> > I saw that in 2.6 kernel there is ide-cd ; should I add somethng like
> > hdc=ide-cd in grub.conf ?
> No.
> > Should I specify something regarding DMA in grub.conf ? (Now there is
> > nothing about DMA in grub.conf)
> No.
> 
> > I had tried mounting the CDROM like thus: (I am not sure at all it's OK)
> > mount -t iso9660 /dev/cdrom /mnt/cdrom
> > but I got many errors in the log (hdc: DMA timeout retry and hdc: status 
> > error : error =0x00 and
> > hdc:  drive not ready for command).
> 
> Yes, you're right that this could be a DMA error. But forget grub.conf,
> it's not relevant for this.
> 
> When you say that you used this on RH9, was that on the same computer?
> Has anything been done internally? Especially, has anything been added
> or removed? Has this been working with another OS? (Are you sure it's
> still working?) What sort of computer is this?
> 
> Have you checked with several CDs?
> 
> Try running
> hdparm /dev/hdc
> to take a look at the state of the drive. If you find that it reports
>  using_dma    =  1 (on)
> then try running
> hdparm -d0 /dev/hdc
> 
> Then try mounting it again. If that fixes it, then copy
> /etc/sysconfig/harddisks to /etc/sysconfig/harddiskhdc, edit the hdc
> copy of the file, and change
> # USE_DMA=1
> to
> USE_DMA=0
> 
> Hope this helps,
> 
> James.
> 
> -- 
> E-mail address: james | The sendmail configuration file is one of those
> @westexe.demon.co.uk  | files that looks like someone beat their head on
>                       | the keyboard.  After working with it... I can see
>                       | why!
> 
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> 



		
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