[CentOS] New CD-ROM drive causes kernel panic
Alfred von Campe
alfred at 110.net
Wed Dec 28 13:24:08 UTC 2005
Thanks for all the responses.
> You might want to first check your BIOS settings for the CDROM drive,
> and then the data cable. I really don't think there is such a thing
> as an incompatible CDROM, but I have seen some BIOS settings making
> CDROM drives behave weirdly.
What type of BIOS settings are you talking about? The system is
currently up and running, so I can't easily check it (but I'll
probably reboot it later today).
> Don't forget you can completely _disable_ the sucker in the BIOS.
> Yeah,
> you can't boot from it, but you only need that during an install.
Doh! Why didn't I think of that?
> I would recommend checking the master/slave jumper settings. Is the
> cdrom drive the only drive on the cable? On what positions does the
> bios
> report the drive (primary/secondary channel, master/slave?). changing
> DMA settings for the drive may help too. How does Linux recognize the
> drive (dmesg + /proc on which, as which drive hda, hdb, hdc, hdd?)
The master/slave setting is set to exactly the same setting (slave)
as the CD-ROM drive it replaced (there is another drive on that same
cable). And how do I change the DMA settings? I think this is what
may be causing the problem. Linux currently doesn't recognize the
drive, as it is disconnected. But I believe it's /dev/hdb (although
it might be /dev/hdd). There are two hard disks at /dev/hda and /dev/
hdc that are mirrored together and mounted as /home.
Alfred
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