Date: Sat, 21 Jun 1997 17:07:34 -0700 (PDT) From: Simon Shapiro <Shimon@i-Connect.Net> To: Wilko Bulte <wilko@yedi.iaf.nl> Cc: hackers@FreeBSD.ORG, gjennejohn@frt.dec.com Subject: Re: Announcement: New DPT RAID Controller Driver Available Message-ID: <XFMail.970621170734.Shimon@i-Connect.Net> In-Reply-To: <199706211509.RAA00356@yedi.iaf.nl>
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Hi Wilko Bulte; On 21-Jun-97 you wrote: ... > > an earlier poster that those flimsy flex connections are pretty cheesy > > and *so* easy to ruin). > > You are not supposed to get your hands on them... Newer SBBs have > 'warranty void' stickers on them to keep people from opening them. > > If you want a really fragile flex check out a TZ8[67] DLT tape drive > in an SBB. But kidding aside: you need to be careful with the flexes, > but apart from that it works just fine. The flex circuit has a reason (other than being the ``cool'' thing to do); they eliminate connectors (improves signal quality), and allow impedience matching. The worst enemy of a SCSI bus is the impedience changes between traces, connectors, external cables, connectors, ribbon cables, backplanes, stub riboon cables, etc. etc. Simon
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