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: =20 Subject: RE: ATA drives with ATA66 (?) controller Classification: Restricted > Does anyone know what CS stands for (Cable Select?) and what it is fo= r? This is something of a remnant from the days of the original IBM Wester= n 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 c= orrect pins on the disk. This stopped=20 both drives reacting to the same select line going active.=20 The jumper on the drive just replaces the twist (allowing for the use o= f 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 message
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