Date: Sun, 18 Feb 1996 17:32:57 -0800 From: "Justin T. Gibbs" <gibbs@freefall.freebsd.org> To: Bob Willcox <bob@luke.pmr.com> Cc: freebsd-current@freefall.freebsd.org (freebsd-current) Subject: Re: Exabyte 8mm tape drive performance in -current? Message-ID: <199602190132.RAA17788@freefall.freebsd.org> In-Reply-To: Your message of "Sun, 18 Feb 1996 15:55:21 CST." <199602182155.PAA01590@luke.pmr.com>
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>I have observed that the (read and write) performance of my 8mm >Exabyte tape drives on my -current system runs roughly half of what >it is on my 2.1-stable systems (100kb/sec vs. 200kb/sec). This is >with both the NCR 810 and Adaptec 2940 adapters and using programs >such as dump, tar, dd, team. The systems that I have compared have >roughly the same hardware (both are 100MHz Pentiums). Performance >on my Wangtek QIC-525 tape drive is about the same. Can anybody >offer up an explaination of why this is and what might be done to >fix it? I'd like to see if I can reproduce this on my system here. I have both a -stable and -current boot configuration so I can test on both. I'm using an Archive Python though, but if this is a generic SCSI problem, it should still show up. Do you have a particular benchmark script you'd like me to use? >Thanks, >-- >Bob Willcox >bob@luke.pmr.com >Austin, TX -- Justin T. Gibbs =========================================== FreeBSD: Turning PCs into workstations ===========================================
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