# Shared between sparc and sparc64
   /dev/sd0a	/	ffs
   /dev/sd0b	none	swap
   
this is fine.

   # sparc boot
   /dev/sd0d	/boot	ffs
   # sparc64 boot
   /dev/sd0e	/boot64	ffs

you really only need one of these.  the real "/" should contain
one of them...

you may also want to investigate hard coding kernel root devices
if you do this -- booting from sd0d but wanting root on sd0a isn't
hard but unless you (a) use raidframe for it or (b) hard-code the
root device when building a kernel (eg, use something like
'config netbsd root on sd0a type ?' in the config file.)


.mrg.