Afraid this might be a FAQ, but...
I'm facing a "cannot mount root" problem. PLS help.

<How it does not work>
The booting stoppes at;

ncrscsi0 targ 0 lun 0: <IBM, DORS-32160, S82C> SCSI2 0/direct fixed
sd0 at scsibus0: 2063MB, 6703 cyl, 5head, 126 sec, 512 bytes/sec
ncr96scsi0 at mainbus0 not configured

Changing root device to sd0a
I/O map kludge for old ROMs that use hardware addresses directly.
panic: cannot mount root
Stopped at      _Debugger+0x6:  unlk    a6
db>


<Environment>
Kernel: NetBSD1.1 generic#47
Booter: v1.9.2
H/W: SE/30 w/ 20M RAM, 2G HDD(SCSI ID 0), Apple CD-300(SCSI ID3)
     Mode32 v7.5 installed, but NO RAM Doubler installed
Partition: partitioned w/ APS2.7.3, from the top
     MacOS 500M:Apple_HFS (MacOS7.5.3, BSD utils installed)
     MacOS 500M:Apple_HFS
     MacOS 500M:Apple_HFS
     UNIX Root&Usr slice 0 521M:Apple_UNIX_SVR2
     Swap 42M: Apple_UNIX_SVR2
Booter preferene: default setting


<Referenece>
Though I can get the follwoing info with Minishel from Installer;
sd0 at scsi ID0.
Mounting partition 'A' as /

> cat /etc/fstab
/dev/sd0a       /       ufs     rw 1 1
/dev/sd0b       none    swap    sw 0 0
kern            /kern   kernfs  rw 0 0
proc            /proc   procfs  rw 0 0

Thanx in advance.
Tokuyuki KOMIYAMA