Re: devfs newbie: dissapearing or somtimes not created cdrom

[C R Johnson <iamcliff@xxxxxxxxxxxxxxxx>]

Rob MacGregor wrote:

> I suspect you'll find that the cdrom drive support is compiled as a 
> module.  When the module hasn't been used for some time it'll be 
> removed and devfs will unregister it.  That's what happened to me with 
> my printer and tape drive.  However reloading the modules solved this.
Reloading the modules does not work for me.

Here are some things I noticed,

- from /var/log/messages when devfsd unloaded:

Sep 27 23:50:00 pigpen devfsd[19]: action_compat: error unlinking: 
"cdrom0"^INsuch file or directory

It really looks like that, "^I and all".



- unloading and reloading the cdrom driver changes nothing:

[root@pigpen cliff]# /sbin/modprobe -r sr_mod

[root@pigpen cliff]# /sbin/lsmod
Module                  Size  Used by
tuner                   4256   1  (autoclean)
bttv                   62288   0  (autoclean) (unused)
i2c-algo-bit            7392   1  (autoclean) [bttv]
videodev                5248   2  (autoclean) [bttv]
ppp_async               6928   1  (autoclean)
ppp_generic            20208   4  (autoclean) [ppp_async]
es1371                 31712   0
ac97_codec              8864   0  [es1371]
autofs                 12112   1  (autoclean)
8139too                17040   1  (autoclean)
ipchains               41440   0  (unused)
tvaudio                 8544   0  (autoclean) (unused)
i2c-core               13008   0  (autoclean) [tuner bttv i2c-algo-bit 
tvaudio]
sound                  64912   0  (autoclean) (unused)
soundcore               4784   6  (autoclean) [es1371 sound]
usb-uhci               22784   0  (unused)
usbcore                51824   1  [usb-uhci]
aic7xxx               136976   3
sd_mod                 11712   3
scsi_mod               98176   2  [aic7xxx sd_mod]

[root@pigpen cliff]# /sbin/modprobe sr_mod

[root@pigpen cliff]# /sbin/lsmod
Module                  Size  Used by
sr_mod                 15312   0  (unused)
cdrom                  28960   0  [sr_mod]
tuner                   4256   1  (autoclean)
bttv                   62288   0  (autoclean) (unused)
i2c-algo-bit            7392   1  (autoclean) [bttv]
videodev                5248   2  (autoclean) [bttv]
ppp_async               6928   1  (autoclean)
ppp_generic            20208   4  (autoclean) [ppp_async]
es1371                 31712   0
ac97_codec              8864   0  [es1371]
autofs                 12112   1  (autoclean)
8139too                17040   1  (autoclean)
ipchains               41440   0  (unused)
tvaudio                 8544   0  (autoclean) (unused)
i2c-core               13008   0  (autoclean) [tuner bttv i2c-algo-bit 
tvaudio]
sound                  64912   0  (autoclean) (unused)
soundcore               4784   6  (autoclean) [es1371 sound]
usb-uhci               22784   0  (unused)
usbcore                51824   1  [usb-uhci]
aic7xxx               136976   3
sd_mod                 11712   3
scsi_mod               98176   3  [sr_mod aic7xxx sd_mod]

[root@pigpen cliff]# mount /cdrom
mount: special device /dev/hdb does not exist

# ls -l /dev/hdb
[root@pigpen cliff]ls: /dev/hdb: No such file or directory

[root@pigpen cliff]# ls -l /dev/cdrom
lr-xr-xr-x    1 root     root           13 Sep 28 13:45 /dev/cdrom -> 
cdroms/cdrom0

[root@pigpen cliff]# ls -l /dev/cdrom
lr-xr-xr-x    1 root     root           13 Sep 28 13:45 /dev/cdrom -> 
cdroms/cdrom0

[root@pigpen cliff]# ls -l /dev/cdroms
total 0

[root@pigpen cliff]# ls -l /dev/ide/cd/
total 0

[root@pigpen cliff]# ls -l /dev/ide/  
cd     hd     host0  host2 

[root@pigpen cliff]# ls -l /dev/ide/host0/bus0/target1/lun0/
total 0

Regards,

Cliff