[linux-help] Re: Can't mount cdrom

[Greg House <ghouse@xxxxxxxxxxxxx>]

On Saturday 06 July 2002 23:07, you wrote:
> I installed RH7.2 on a rather minimal system (P133, 32MB memory, 1.2GBdisk)
> and the install went pretty well and the cdrom worked perfectly during the
> install. but when I booted up, I couldn't mount the cdrom.
>
> [root@bertha]# mount  /mnt/cdrom
> mount: /dev/cdrom is not a valid block device
>
> /dev/cdrom is a link to /dev/hdc and /hdc is not listed in
> /proc/partitions. /etc/fstab looks normal.

Check your dmseg output to see if it says anything about the cdrom drive.
That section of mine looks like this:

    ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:DMA, hdd:DMA
hda: WDC AC36400L, ATA DISK drive
hdc: Pioneer CD-ROM ATAPI Model DR-A14S 0104, ATAPI CD/DVD-ROM drive
hdd: ST3660A, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: 12594960 sectors (6449 MB) w/256KiB Cache, CHS=784/255/63, UDMA(33)
hdd: 1065456 sectors (546 MB) w/120KiB Cache, CHS=1057/16/63, DMA
hdc: ATAPI 32X CD-ROM drive, 128kB Cache, DMA
Uniform CD-ROM driver Revision: 3.12

I don't understand how /proc/partitions (which you mentioned) works, but you 
could look in /proc/ide which should have a directory for each ide device 
configured (hda, hdb, hdc, hdd, etc). In the directory, it has files that  
have information like the model number, the driver, etc.

Greg
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