SUMMARY: sun4c vs sun4 issue yet remains in 4.1?

From: Manavendra K. Thakur (
Date: Fri Jun 08 1990 - 07:48:39 CDT

I originally asked:

> So, my question is: are there different tapes required to install
> 4.1 on a sun4c architecture (SS1 and SS1+)? I thought both of these
> had been integrated into the general sun4 os release, and now I'm
> starting to think otherwise. Will those who have installed 4.1 on a
> SS1 or SS1+ machine please take a look at their OS tapes and see
> whether it says "Sun-4c SUNBIN" or not?

The overwhelming answer is YES, you need sun4c tapes (not sun4) to
install 4.1 on a SS1 or SS1+. Apparently, there are three separate
4.1 versions for Sun sparc machines:

        sun4 (low and mid-range sparc server machines)
        sun4c (SS1 and SS1+)
        sun4 PSA (High end sparc servers -- 4/390, 4/490, 4/470, ...)

And there are two 4.1 versions for the sun3 line:

        sun3 (MC68020 based systems: 3/160, 3/60, 3/50, ...)
        sun3x (MC68030 based systems: 3/470, 3/80, 3/480, ...)

So the moral of the story is twofold:

        1) Make sure you order the correct OS version for the machines
           you have! Specify the appropriate part number on your
           purchase order.

        2) Call your Sun sales representative or technical support
           people and ask them why Sun haven't integrated sun4 and
           sun4c architectures into one release yet. This issue might
           be ameliorated somewhat next year when Sun starts
           distributing its OS only on compact discs (CD-ROMs), but
           that still isn't any reason to have 5 different versions of
           the OS hanging around.

Many thanks to all who've responded: (Stan Barber)
Tom Leach <>
Paul Graham <>
Frank W. Peters <fwp1@CC.MsState.Edu>
Ed Anselmo <anselmo-ed@CS.YALE.EDU>
Jay Plett <>
jam@philabs.Philips.Com (John A. Murphy) (Michael Lamoureux) (Peter Galvin) (Sam Fulcomer)

Manavendra K. Thakur
System Manager, Internet:
High Energy Division,
Harvard-Smithsonian Center for BITNET: thakur@cfa.BITNET
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