Date: Fri, 29 Nov 1996 00:32:16 -0800 (PST) From: Jake Hamby <jehamby@lightside.com> To: Robert Shady <rls@mail.id.net> Cc: freebsd-chat@freebsd.org Subject: Re: Differential vs. Standard Message-ID: <Pine.BSF.3.95.961129003005.193A-100000@hamby1> In-Reply-To: <199611291659.LAA24814@server.id.net>
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I'm not a SCSI expert, but I seem to remember that differential drives use differential signaling, which allows a longer total cable length than the standard 2 meters. The downside is that you need a special differential SCSI controller, and you can't mix differential and regular SCSI drives on the same chain. To do so will almost certainly physically damage your hardware! So yes, they're cheap, but you can't mix and match them with your existing SCSI controller or drives. Sorry... -- Jake On Fri, 29 Nov 1996, Robert Shady wrote: > Okay, this is the third time I've had to type this because I kept hitting > the wrong key... > > Basically, I have the opportunity to grab a couple unused spare Seagate > ST-410800WD hard drives, 9GB, Fast/Wide, Differential, 68 pin connectors. > I will be able to get these drives at about 25% less than my cost through > Ingram Micro, TechData, Mersiel, etc... (Which are all out of stock BTW). > > 1. Is there any problems with these drives. > 2. What exactly does "Differential" mean? Does it help, or hurt? > Differential drives appear to cost slightly more than the standard > versions, which leads me to believe that they may be better in some > way shape or form. > > I'm supposed to pick these up in an hour or two so the quicker the response > the better... > > -- Robhelp
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