Date: Sun, 03 Nov 1996 21:47:05 -0800 From: "Michael L. VanLoon -- HeadCandy.com" <michaelv@MindBender.serv.net> To: Michael Smith <msmith@atrad.adelaide.edu.au> Cc: jkh@time.cdrom.com (Jordan K. Hubbard), hardware@freebsd.org Subject: Re: OK, what's the deal with 2940W controllers and internal connectors? Message-ID: <199611040547.VAA28693@MindBender.serv.net> In-Reply-To: Your message of Mon, 04 Nov 96 15:02:13 %2B1030. <199611040432.PAA12438@genesis.atrad.adelaide.edu.au>
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>Jordan K. Hubbard stands accused of saying:
>> Then I was talking to Poul-Henning last night who pooh-pooh'd my
>> foolish conservatism and stated that I could have used both internal
>> connectors on my 2940UW no problem. Since I could use that 1542 as my
>> spare again (which is why I have it), I'd sort of like to know which
>> one of us is correct? :-)
>Stub length limit on the SCSI bus is spec'ed at 7" IIRC. Pick one arm
>of the Y, say "hello stub", and make it as short as possible.
Actually, the manual that comes with the Adaptec 3940 says that the
maximum length is supposed to be something like a meter, and you
should have at least twelve inches between devices for optimal
performance (I can look up the exact wording if it's of interest).
>I've run longer stubs (over about 50cm things get nasty), but only on
>old/slow stuff (old workstations, 1542 clones, slow disks).
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Michael L. VanLoon michaelv@MindBender.serv.net
--< Free your mind and your machine -- NetBSD free un*x >--
NetBSD working ports: 386+PC, Mac 68k, Amiga, Atari 68k, HP300, Sun3,
Sun4/4c/4m, DEC MIPS, DEC Alpha, PC532, VAX, MVME68k, arm32...
NetBSD ports in progress: PICA, others...
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