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From: ghn@munsell.UUCP (Gary Newman)
Newsgroups: net.periphs,net.unix-wizards
Subject: Fast Disk Controllers on a Sun-3
Message-ID: <280@macadam.munsell.UUCP>
Date: Fri, 19-Sep-86 18:04:35 EDT
Article-I.D.: macadam.280
Posted: Fri Sep 19 18:04:35 1986
Date-Received: Sat, 20-Sep-86 01:50:11 EDT
Reply-To: ghn@munsell.UUCP (Gary Newman)
Distribution: world
Organization: Eikonix Corp., Bedford, MA
Lines: 19
Keywords: disk,controller,sun
Xref: mnetor net.periphs:535 net.unix-wizards:7923

I have been using the Interphase VSMD-3200 controller with a fujitsu
double eagle (2.4 Mb/S) disk on my Sun-3 in hopes of getting fast disk
transfers.  I have been using the Interphase supplied device driver with
no hacking on my part.

The best performance I have seen to date is about 0.75Mb/S for
10Mb reads from the raw disk.  The hardware should be able to do
close to 2 Mb/S... anyone out there know why it's so slow?  
Interphase claims that they are looking into it (they don't know why).

Has anyone seen better performance than this from a disk?  
Any better disk controllers on a Sun-3?  I'm only considering
VME boards, no multibus adapters.

Please reply via mail & I'll summarize for the net.

Gary Newman @ Eikonix
(617) 275-5070
{adelie, encore}!munsell!ghn