From: utzoo!decvax!ucbvax!info-vax
Newsgroups: fa.info-vax
Title: uba vs. massbuss
Article-I.D.: ucbvax.150
Posted: Wed Mar 30 05:59:35 1983
Received: Thu Mar 31 03:09:59 1983

>From GEOFF5@SRI-CSL  Wed Mar 30 05:58:36 1983
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To: info-vax@sri-csl, unix-wizards@sri-csl
Via:  UMCP-CS; 27 Mar 83 3:38-EST
Remailed-Date: 29 Mar 1983 1743-PST
Remailed-From: the tty of Geoffrey S. Goodfellow  <Geoff5 at SRI-CSL>
Remailed-To: Info-VAX: ;

DEC now offers a 450 megabyte winchester for a very reasonable
cost.  Only problem: it is a Unibus only device.
My question is, what kind of load does putting several of these
put on a unibus?  Should one buy a unibus for each (kind of eats
into the cost..). The Vax configuration guide that comes with
BErkeley Unix says that massbuss disks are a waste since most
disks can't even xfer a unibus speeds anyway (according to their
calculations, not even the touted RP07 talking to interleaved memory).
I am looking now at configuring a 780 system with NO massbusses.
Advice, anyone?