Date: Sun, 19 Apr 1998 23:46:55 -0600 (MDT) From: "Justin T. Gibbs" <gibbs@narnia.plutotech.com> To: David Kelly <dkelly@hiwaay.net> Cc: hardware@FreeBSD.ORG Subject: Re: Narrow SCSI controllers, and using WIDE drives with them Message-ID: <199804200546.XAA12945@narnia.plutotech.com> In-Reply-To: <199804200355.WAA00526@nospam.hiwaay.net>
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In article <199804200355.WAA00526@nospam.hiwaay.net> you wrote: > Stephen Hocking-Senior Programmer PGS Tensor Perth writes: >> >> Is it possible, and if you have one of those 50 pin flat ribbon cables, is it >> >> possible to buy adaptors for those D-plug style connectors? > > Yes, it is possible to buy adapters. No, it won't work. As a general > rule wide HD's will not fall back to a narrow connection. Wide > controllers are forced to fall back and handle narrow devices as a > special case. You should really read the SCSI spec. All transfers are narrow unless a properly negotiated wide connection is established between target and initiator. On many IBM devices there is a jumper that prevents the device from initiating wide negotiation, but this has no effect on the device's ability to handle 8 bit transfers should a negotiation attempt fail. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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