NetBSD-6.0_BETA2-i386.iso doesn't work

[Mark Davies <mark%ecs.vuw.ac.nz@localhost>]

Hi,
   Trying to boot off a CD with NetBSD-6.0_BETA2-i386.iso written on 
it, the system starts but trips over mounting the root device:

   [...]
boot device: cd0
root on cd0a dumps on cd0b
vfs_mountroot: can't open root device
cannot mount root, error = 6
root device (default cd0a):


Same thing happens with recent iso's that I have built myself.


cheers
mark