Date: Mon, 29 Mar 1999 20:48:42 +0200 (CEST) From: Leif Neland <leifn@neland.dk> To: Darren Reed <avalon@coombs.anu.edu.au> Cc: "Jordan K. Hubbard" <jkh@zippy.cdrom.com>, dfr@nlsystems.com, rivers@dignus.com, dcs@newsguy.com, hackers@FreeBSD.ORG Subject: Re: another ufs panic.. Message-ID: <Pine.BSF.4.05.9903292044370.4745-100000@arnold.neland.dk> In-Reply-To: <199903282241.IAA00135@cheops.anu.edu.au>
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On Mon, 29 Mar 1999, Darren Reed wrote: > In some mail from Jordan K. Hubbard, sie said: > > > > > If this is an aha2940 or similar controller, then it doesn't support using > > > all three connectors at the same time. Using both internal connectors at > > > the same time as the external one is just asking for trouble. > > > > Let me just echo this claim. Back when I was somewhat younger and > > less experienced in the ways of SCSI, I tried to do this for the > > simple reason that it's the obvious thing to try when you have both > > wide and narrow peripherals in the box (like a wide drive and narrow > > cdrom), an external device like a scanner and absolutely no conception > > of how the internal busses are actually wired. What happens then is > > that you create a "Y" in your SCSI chain, with two terminators on one > > end, and the fact that it worked for me at all for 5 months until I > > got another drive for the wide chain and totally pushed things past > > their limits is, frankly, pure amazing luck. > > Sigh :-( It was all working so lovely too...which did you get a new one > for, narrow or wide controller ? > > If you can get a narrow cable to connect in one end to the connector on the controller, the drives in the middle, and to a connector at the back at the machine in the other end, it should work. But this requires the internal drives not to be terminated, and you always have to terminate the bus either at the back og the machine, or at whatever you plug into the back. Leif To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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