Date: Sat, 12 Jul 1997 18:48:19 -0700 (PDT) From: Tom Samplonius <tom@sdf.com> To: "Jin Guojun[ITG]" <jin@george.lbl.gov> Cc: asami@cs.berkeley.edu, crb@Glue.umd.edu, freebsd-scsi@freebsd.org, gary@tbe.net Subject: Re: NCR SCSI controllers Message-ID: <Pine.BSF.3.95q.970712184459.2861A-100000@misery.sdf.com> In-Reply-To: <199707122240.PAA21522@george.lbl.gov>
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On Sat, 12 Jul 1997, Jin Guojun[ITG] wrote: > I have no problem with NCR at all. Specially under FreeBSD, It does not take > CPU time. Two disks or 14 disks is not the issue for SCSI controllers. > If you can saturate the SCSI bus with two disks (new tech can), then, putting > 100 disks (assume ID is allowed), would not make any difference at all. There is a difference. Each SCSI channel has some transactional limitation. ... > Does some one have tested any ultra-wide SCSI controllers to have at least > more than 20 MB throughput over a single controller with number of ultra-wide > disks? I posted such question a few month ago, and did not hear any respond. > I was wondering no one had it worked at that time. Not a problem. I used 11 disks on a 3940UW, and was able to max out both channels. With drives being able to sustain 7MB writing, this is getting easier to do. > -Jin Tom
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