bsdlabel partiton c error message on new install

[andys]

Hi, 

ok, so I have attempted to proceed with my original task which was to create 
a new UFS2 parition (using sysinstall). Having chosen "c" and then "w" from 
the lable section, i recieve the following error: 

Error mounting /dev/da0s1g on /export : No such file or directory 

After exiting sysinstall, I can see from bsdlabel: 

8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
a: 20971520        0    4.2BSD        0     0     0
b: 20971520 75497472      swap
c: 285153687        0    unused        0     0         # "raw" part, don't 
edit
d: 20971520 20971520    4.2BSD        0     0     0
e: 20971520 41943040    4.2BSD        0     0     0
f: 12582912 62914560    4.2BSD        0     0     0
g: 146800640 96468992    4.2BSD        0     0     0
bsdlabel: partition c doesn't cover the whole unit! 

"g" is my new partition. Under /dev however I dont see the device file: 

ls /dev/da0*
/dev/da0        /dev/da0s1a     /dev/da0s1c     /dev/da0s1e
/dev/da0s1      /dev/da0s1b     /dev/da0s1d     /dev/da0s1f 

Can anyone help :( 

thanks a lot,
Andy.