From owner-freebsd-questions Wed Apr 26 12:43:12 1995 Return-Path: questions-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id MAA23637 for questions-outgoing; Wed, 26 Apr 1995 12:43:12 -0700 Received: from obiwan.pmr.com (obiwan.pmr.com [199.98.84.130]) by freefall.cdrom.com (8.6.10/8.6.6) with SMTP id MAA23631 for ; Wed, 26 Apr 1995 12:43:09 -0700 Received: by obiwan.pmr.com (Smail3.1.29.1 #4) id m0s4CzA-000300C; Wed, 26 Apr 95 14:42 CDT Message-Id: From: bob@obiwan.pmr.com (Bob Willcox) Subject: Re: BT946C strangeness To: tom@haven.uniserve.com (Tom Samplonius) Date: Wed, 26 Apr 1995 14:42:56 -0500 (CDT) Cc: questions@FreeBSD.org In-Reply-To: from "Tom Samplonius" at Apr 24, 95 01:45:00 pm X-Mailer: ELM [version 2.4 PL23] Content-Type: text Content-Length: 905 Sender: questions-owner@FreeBSD.org Precedence: bulk Tom Samplonius wrote: > > > I've just got a BT946C, and decided to try it out with the latest > SNAP. The weird part is that is detects it as a EISA device! It boots > up and runs fine, but disk performance is very poor (about 1.5meg/s on > writes). What is your read performance? The write speed of my DSP3210S's was about 1.5meg/sec before I enabled their write caching (the DSP3210S defaults to not caching writes). With the write caching enabled I get about 4.5meg/sec (and about 4meg/sec read, though that didn't change). This is on a BT-747S controller. BTW, one enables the write caching by setting a bit in mode page 8 (as I recall). Also, for DEC drives you have to reset a bit in mode page 2. Email me if you would like some instructions and a program I got from a person at DEC you can use to do this. -- Bob Willcox bob@obiwan.pmr.com (or obiwan%bob@uunet.uu.net) Austin, TX