Date: Thu, 5 Mar 1998 08:14:40 +0100 (MET) From: Wilko Bulte <wilko@yedi.iaf.nl> To: shimon@simon-shapiro.org Cc: grog@lemis.com, hackers@FreeBSD.ORG, blkirk@float.eli.net, jdn@acp.qiv.com, tlambert@primenet.com, sbabkin@dcn.att.com, karl@mcs.net Subject: Re: SCSI Bus redundancy... Message-ID: <199803050714.IAA08081@yedi.iaf.nl> In-Reply-To: <XFMail.980304161432.shimon@simon-shapiro.org> from Simon Shapiro at "Mar 4, 98 04:14:32 pm"
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As Simon Shapiro wrote... > ... > > > Or a FibreChannel array. Will be playing with that for the rest of the > > week. I'm pretty curious to see how that behaves. > > Ah, the first usable and functional disk channel to hit small computers. > The demos I saw several years ago showed over 1,700 TPS to a single drive. > And it is redundant, EMI/RFI clean, wonderful, and expensive. For now we have a FC frontend connection, and UW on the device end. Makes it possible to go from a UWD frontend array controller to a FC one with the same box & drives. > > I don't know if DPT will be part of our product offering. I play with > > what they throw at me ;-) The FC array is cute so I don't complain. > > I do NOT work for DPT. I get generous help when I need it. But they have > an FCAL HBA someplace. There was another company in Colorado (?) which had > a controller. They promised me a card to write the FreeBSD driver, but I > never hear from them anymore. HBA for PCI / FC can be had from Emulex, Jaycor, Adaptec, Genroco, PTI and probably more. > ... > > >> the ball on tracking these down but will pick it up soon. SMP is twice > >> as slow as UP in these tests. > > > > Somebody/something locking resources? But that is definetely worth > > investigating for SMP users. > > Yup. I never invoked any interest in this phenomenon, other than ``if you > find why, give me the patch''. Wilko _ ______________________________________________________________________ | / o / / _ Bulte email: wilko @ yedi.iaf.nl http://www.tcja.nl/~wilko |/|/ / / /( (_) Arnhem, The Netherlands - Do, or do not. There is no 'try' --------------- Support your local daemons: run [Free,Net,Open]BSD Unix -- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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