der Mouse said:

>My memory, fuzzy though it may be, says that the (id<<3)+lun formula
>was used in the Sun-3 world, whereas with the Sun-4 they decided to
>stop bothering with LUNs.  (Though it occurs to me as I write this that
>they could have switched to (lun<<3)+id for all I know; it would be not
>much more code, would preserve the capability, and would gain the
>benefit they presumably wanted of having the ID readily visible in the
>common case of LUN=0.)

From the SunOS 4.1.1 Release Manual

Booting the CD on SUN4 kernel architecture:

>b sd(,30,1)

Desktop SPARCsystem other than SPARCstation 2

ok boot sd(,6,2)

ok b sd(,6,2)

I haven't looked at that manual in years. Lots of trivia.

-- 
Rick Kelly  rmk@rmkhome.com  www.rmkhome.com