Date: Wed, 26 Apr 1995 13:29:50 -0700 (PDT) From: Tom Samplonius <tom@haven.uniserve.com> To: Bob Willcox <bob@obiwan.pmr.com> Cc: questions@FreeBSD.org Subject: Re: BT946C strangeness Message-ID: <Pine.BSF.3.91.950426132740.2779A-100000@haven.uniserve.com> In-Reply-To: <m0s4CzA-000300C@obiwan.pmr.com>
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On Wed, 26 Apr 1995, Bob Willcox wrote: > 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. The raw read performance (using "dd") was 3511650 bytes/s. Using "iozone 100" would yield about 1.7 MB/s for both read and write. > 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. I would very much like to see this info. Tom
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