Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!uunet!tut.cis.ohio-state.edu!cica!sol.ctr.columbia.edu!emory!hubcap!ncrcae!sauron!stevem From: stevem@sauron.Columbia.NCR.COM (Steve McClure) Newsgroups: comp.sys.amiga Subject: Re: QA at C= Message-ID: <2155@sauron.Columbia.NCR.COM> Date: 29 May 90 13:04:58 GMT References: <1131@cica.cica.indiana.edu> Reply-To: stevem@sauron.UUCP (Steve McClure) Distribution: na Organization: E&M-Columbia, NCR Corp, W Columbia, SC Lines: 31 In article <1131@cica.cica.indiana.edu> greg@cica.indiana.edu (Gregory TRAVIS) writes: > [ problem description deleted ] > >My second 2500 only has the problem that the 2091 cannot handle ANY but the >slowest drives in addition to the internal quantum. From experiments that >I've done with my 2091 and those of friends or the workplace determines that, >for all intents and purposes, the 2091 (Rev 4.0 MODIFIED) is a single-drive >controller. It simply cannot handle any of the modern large drives >(Maxtor/CDC Wren/Miniscribe have ALL been tried) if you have another drive >also connected to it. Perhaps that's the "engineering hold" people have been >talking about for the 2091, but this really should have been caught at QA, >AT LEAST. Since I cannot run other processes that might go for a drive >other than the one I am currently using (or risk locking up the system) >I cannot multitask on my Amiga. Well I have had two Conner CP340's a Fujitsu 2246SA and a Micropolis 1575 and a Archive 2160S tape all on my 2091 at the same time. I constantly run two disks and have done tape I/O with one disk while compiling on the other. I haven't seen any problems with "lockups." The Fujitsu is a 170M with 64K cached and the Micropolis is a 380M with 64K cache. These disk drives diskperf2 at over 750K per sec reads and 500K writes. I'm not sure if my 2091 is Rev 4.0 MODIFIED? This seems like a very solid product to me. Just my 2 cents worth. -- ---------------------------------------------------------------------- Steve email: Steve.McClure@Columbia.NCR.COM 803-791-7054 The above are my opinions, which NCR doesn't really care about anyway! CAUSER's Amiga BBS! | 803-796-3127 | 8pm-8am 8n1 | 300/1200/2400