after reboot rtc dsp missing from /dev

[Prashant kumar <prashkr@cse.iitk.ac.in>]

Everytime I reboot my system I find some useful entries such as dsp,rtc 
.. not in /dev

moreover ./MAKEDEV audio too doesn't work  as a work around I create 
these device entries using mknod.

though MAKEDEV not working is a problem in itself but  more importantly 
why should those entries vanish on reboot ?



I guess following inforamtion should help:

During boot I get  following warning

warning: .udevdb already exists on old /dev !

df  -h gives followingFilesystem         
 Size  Used Avail Use% Mounted on
/dev/sda6             5.5G  3.9G  1.4G  75% /
tmpfs                 245M     0  245M   0% /dev/shm
/dev/sda2              28G   17G  9.6G  64% /home
/dev/sda8              21G   12G  8.1G  58% /backup
/dev                  5.5G  3.9G  1.4G  75% /.dev
none                  5.0M  2.8M  2.3M  56% /dev


also output of mount command is following

/dev/sda6 on / type ext3 (rw,errors=remount-ro)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/sda2 on /home type ext3 (rw,noatime)
/dev/sda8 on /backup type ext3 (rw,noatime)
/dev on /.dev type unknown (rw,bind)
none on /dev type tmpfs (rw,size=5M,mode=0755)
usbfs on /proc/bus/usb type usbfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)


TIA for any help or pointers .
Prashant