Re: [tlug] mount: /dev/cdrom is not a valid block device

[Shawn <javajunkie@example.com>]

Um,

any idea how to check if SCSI-emulation is loaded and or working properly 
(if it's a module I am guessing that can be done)

my grub.conf has it so I think it should be enabled but and my post (below) 
mentions, the driver for my cdrw isn't being found.

title Red Hat Linux (2.4.18-27.8.0)
	root (hd1,1)
	kernel /vmlinuz-2.4.18-27.8.0 ro root=LABEL=/ hdc=ide-scsi
	initrd /initrd-2.4.18-27.8.0.img

> Hello,
>
> On RH8.0 my cdrom stopped functioning with a "mount: /dev/cdrom" is not a 
> valid block device error message.
>
> To make sure that my system is finding your cdrom drive when it boots.
> I did dmesg | less which showed me that it was "hdc: SONY CD-RW CRX140E, 
> ATAPI CD/DVD-ROM drive", but also gave me a "hdc: driver not present" 
> message.
>
> Why? I need SCSI-emulation to burn a CD with a burner don't I?  How can I 
> check if I have that?  How can I configure it?
>
> (somewhat of a newby, haven't ever complied a kernel)
>
> I am guessing from the following and the info below that for some reason 
> SCSI-emulation has been turned off or removed. But I really am not sure. 
> Any help please (even if just to let me know I am really really off- 
> track)?
>
> /sbin/lsmod | grep cd
> ide-cd 30632 0
> cdrom 30208 0 [sr_mod ide-cd]
> ehci-hcd 15464 0 (unused)
> usbcore 69664 1 [usb-storage hid usb-uhci ehci-hcd usb-ohci]
>
>
>
> /sbin/lsmod | grep ide
> ide-cd                 30632   0
> cdrom                  30208   0 [sr_mod ide-cd]
>
> ******the following was found in my searches *********
> As
> suggested, you could use SCSI-emulation, which is necessary for burning 
> CDs
> with a burner, but not necessary for read-only drives. It's simpler to
> stick with the IDE CD driver.
>
>
> The source of your "driver not present" error message is the ide_open()
> function in /usr/src/linux/drivers/ide/ide.c.  Even if you don't know C,
> it's not too hard to understand:
>
>
> static int ide_open (struct inode * inode, struct file * filp)
> {
> ide_drive_t *drive;
> ...
> if (drive->driver == NULL) {
> if (drive->media == ide_disk)
> (void) request_module("ide-disk");
> if (drive->scsi)
> (void) request_module("ide-scsi");
> if (drive->media == ide_cdrom)
> (void) request_module("ide-cd");
> if (drive->media == ide_tape)
> (void) request_module("ide-tape");
> if (drive->media == ide_floppy)
> (void) request_module("ide-floppy");
> }
>



-- 
Shawn

Happily using M2, Opera's revolutionary e-mail client: 
http://www.opera.com/m2/