Date: Fri, 21 Jan 2000 10:41:21 +0100 From: robert.schofield@philips.com To: <freebsd-hardware@freebsd.org> Subject: RE: ATA drives with ATA66 (?) controller Message-ID: <0056890008067062000002L922*@MHS>
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K.J.Koster@research.kpn.com@SMTP@FreeBSD.ORG on 21/01/2000 09:26:34 Sent by: owner-freebsd-hardware@FreeBSD.ORG To: freebsd-hardware@FreeBSD.ORG@SMTP cc: Subject: RE: ATA drives with ATA66 (?) controller Classification: Restricted > Does anyone know what CS stands for (Cable Select?) and what it is for? This is something of a remnant from the days of the original IBM Western Digital two-cable setup. All drives were manufactured with a primary disk and secondary disk select on the connectors; a twist in the cable was needed to make sure that the cable select lines were delivered to the correct pins on the disk. This stopped both drives reacting to the same select line going active. The jumper on the drive just replaces the twist (allowing for the use of a cheaper to make flat cable),and should be needed when you have two disks on the same cable as master and slave. Rob Schofield -- "Not quick, but brilliant!" - quote from a (good) friend. OJ and Aspirin! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the messagehome | help
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