Messages in this thread |  | | Subject | Re: devfs cdrom mount pb | From | Joachim Breuer <> | Date | Wed, 28 Aug 2002 18:12:56 +0200 |
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"qwerty314" <qwerty314@voila.fr> writes:
> My linux box was runing fine till I decide to try devfs on RH7.3 > with 2.4.18-3 kernel after some adjustments everything is nearly OK > with the new /dev concepts but when I try to mount a cdrom it says > that the device is not a block device. cat /proc/scsi/scsi gives : > > Attached devices: > Host: scsi0 Channel: 00 Id: 00 Lun: 00 > Vendor: PLEXTOR Model: CD-R PX-W1610A Rev: 1.02 > Type: CD-ROM ANSI SCSI revision: 02 > Host: scsi0 Channel: 00 Id: 01 Lun: 00 > Vendor: SAMSUNG Model: CD-ROM SC-152C Rev: CS05 > Type: CD-ROM ANSI SCSI revision: 02 > > and ls -l /dev/scsi/host0/bus0/target1/lun0/* gives > crw-rw-rw- 1 root root 21, 1 jan 1 1970 > /dev/scsi/host0/bus0/target1/lun0/generic > > quid? > why has my cdrom entry switched from a block to a character device > and how to cure it ?
You do not have the sr_mod module loaded; thus /dev/scsi/<address>/ only contains the "generic" device node, not the "cdrom" block device node.
Either load sr_mod from a startup script (/etc/rc.modules comes to mind), or set up the devfs module autoloader appropriately.
The device to be used for mounting is /dev/scsi/<address>/cdrom, not /dev/scsi/<address>/generic. The generic device is "only" used for special-purpose commands, such as for scanners or CD writing. Those special commands are not block-level, thus "generic" is a character device.
So long, Joe
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