Date: Wed, 12 Jun 1996 15:45:47 -0400 (EDT) From: Rashid Karimov <rashid@rk.ios.com> To: shovey@buffnet.net (Stephen Hovey) Cc: bobster@primenet.com, jparnas@jparnas.cybercom.net, freebsd-questions@freebsd.org, bsdi-users@bsdi.com Subject: Re: Adaptec2940UW vs. BusLogicBT-958 (opinions?) Message-ID: <199606121945.PAA00542@rk.ios.com> In-Reply-To: <Pine.BSD.3.91.960612150027.11030B-100000@buffnet7.buffnet.net> from "Stephen Hovey" at Jun 12, 96 03:02:13 pm
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Hi there folx, > On Wed, 12 Jun 1996, Bob Loftus wrote: > > On Wed, 12 Jun 1996, Jacob M. Parnas wrote: > > > Would you please elaborate a bit on the logic? I don't see why with up to > > > 15 devices, you couldn't fill up 40MB/sec for a fast/wide/ultra SCSI III bus? > > > Especially with some raids counting as one large SCSI device? > > I did. http://www.nexial.nl/cgi-bin/bsdi search for "fast wide scsi > > paul vixie" That should do it. One would have to question the wisdom of > > putting that many devices in a chain on one bus. But hey maybe you could > > teach me something, I'm sure no expert. Yet. ;-> > > Regards, > > Bob... > > > > Ive been watching this thread - Im one of those people in need of many > fast drives and am seeking a better solution that a regular pci 2940 and > regular scsi-2 drives. They+freebsd just dont do it thruput wise for a > very full news server. I have found hat one gets better thruput if you > have 4 2 gig drives than if you have 1 8. So there is one reason for > alot of drives. > Go for CCD - 3 adaptors and 6 HDDs will give you ~18Mb thru-put, which will be more than enough for any news-server. You'll also get ~400 art/sec unlink( expire) speed. I wouldn't even think about using anything _but ccd for news server. Rashid.
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