SCSI Drives for a DECSystem 3100 -- suggestions?

[Gustaf Neumann]

>  ...and they are (supposedly) impossible to use as boot disks under version 4
>     ULTRIX.  HP (factory/engineer/salestypes at HP's primary disk facilities

>We have several DS3100's booting Ultrix 4.0 off of HP97548S drives
>with no problems (the HPs are rev B940, and the DS3100s are pretty
>old--before DEC stripped most of the useful help messages out of the
>boot proms).
>
>There is a problem with DS5000s--the original DS5000 boot proms
>refuse to recognize the HP drives (the system hangs if you do a "cnfg 5"
>or try to boot from one of the HP drives), so you can't boot *any*
>version of Ultrix off an HP connected to a DS5000 with the original
>boot proms.
>
>We just received our first DS5000s with the new proms...

We made similar experiences here. We could boot Ultrix 4.0 from
a HP97548SU (rev. C033) disk on a
 - a DS3100 (must be a newer model, no "useful help messages")                 m
 - a DS5000/200 using the newer firmware level V5.3c (aka: new                 m
   boot proms)
but NOT
 - a DS5000/200 using the original firmware level.                             m

Somewhat different is the situation with Hitachi DK515C (rev CP16):
works with
 - DS3100
 - DS5000/200 with OLD bootproms
but NOT with
 - a DS5000/200 with firmware level V5.3c!!                                    m

The CDC 94181-15 (rev 0293) works with DS3100 and DS5000/200 with new
boot proms.

Hope this helps a little.
-gustaf