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/dev files, mfs, audio, startup etc.

For some unknown reason /dev/audio, /dev/mixer and /dev/sound
files are not present on my system.

  auvia0 at pci0 dev 17 function 5: VIA Technologies VT8233A AC'97 Audio (rev 
  auvia0: interrupting at irq 10
  auvia0: ac97: Avance Logic ALC200/ALC201 codec; headphone,
            18 bit DAC, 18 bit ADC, Realtek 3D
  auvia0: ac97: ext id 605<AC97_22,AMAP,SPDIF,VRA>
  audio0 at auvia0: full duplex, mmap, independent
  isa0 at pcib0

Q1) Why these device files are absent?

According to NetBSD Guide
in this case it is possible to create these devices by hand.

chen# df -i /dev
Filesystem  1K-blocks      Used     Avail Capacity  iused    ifree  %iused  
Mounted on
mfs:18             56        48         5    89%     1157      121    90%   /dev
chen# cd /dev/
chen# ./MAKEDEV all

/dev: create/symlink failed, no inodes free
mknod: ttyCZ0017: No space left on device
/dev: create/symlink failed, no inodes free
mknod: dtyCZ0017: No space left on device 
/dev: create/symlink failed, no inodes free

Q2) Is NetBSD Audio chapter ok or out-of-date?

Q3) What should I do in order to enable my audio card.
    Some time ago, it definitely worked just fine.

       #0: Wed Jul 16 00:28:58 EEST 2008 i386

Some other /dev files are absent too (after startup).
/dev/pf, /dev/pts, /dev/ptm and many others.

What files are created at NetBSD startup?
Where this process is documented?

Best regards, Aleksey Cheusov.

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