Date: Fri, 26 Feb 1999 16:46:22 +0100 (CET) From: Johan Granlund <johan@granlund.nu> To: Jean-Marc Zucconi <jmz@FreeBSD.ORG> Cc: darrylo@sr.hp.com, scsi@FreeBSD.ORG Subject: Re: LVD transfer rate Message-ID: <Pine.BSF.4.05.9902261638440.349-100000@localhost> In-Reply-To: <199902260050.BAA08074@qix>
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On Fri, 26 Feb 1999, Jean-Marc Zucconi wrote: > >>>>> Darryl Okahata writes: > > > sthaug@nethelp.no wote: > >> There's your answer. The "Force SE Mode" jumper must be off, and you need > >> a separate LVD terminator. The disk *does not* have a jumper-selectable > >> LVD terminator. See > >> > >> http://www.storage.ibm.com/techsup/hddtech/ddrs/ddrsjum.htm > > > Going off on a tangent, will an LVD drive work in SE mode with a > > plain wide SCSI controller (non-LVD)? I've got the same drive > > (DDRS-39130), and my vendor appears to have shipped me the LVD version > > instead of the plain FW one. If it does, I assume that the drive > > doesn't have any termination, and I'll have to terminate the cable > > myself. > > It will work because it was my original configuration: I had the SE > jumper on (my first mistake) and I connected it on the wide connector > instead of the LVD connector (my second mistake). It worked also > without terminator. It's a _wery_ bad idea to run without termination!! I got a LVD drive as a replacement for a failed drive. It had a jumper for "term enable" according to the paper on top of the drive. It didnt work. I got a ton of timeouts and other errors. After installing a external active termination block it works like a charm. This is on a Adaptec 2940UW /Johan > > Jean-Marc > > -- > Jean-Marc Zucconi PGP Key: finger jmz@FreeBSD.ORG > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-scsi" in the body of the message > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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