Date: Tue, 24 Nov 1998 10:39:25 +0100 From: sthaug@nethelp.no To: root@zappa.demon.nl Cc: freebsd-current@FreeBSD.ORG Subject: Re: Adaptec SCSI messages Message-ID: <16972.911900365@verdi.nethelp.no> In-Reply-To: Your message of "Tue, 24 Nov 1998 10:35:32 %2B0100" References: <19981124103532.B613@zappa.demon.nl>
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> I guess you are right, but i wonder why they have invented Ultra 2 disks > then. Since my disk performed in Single Ended mode exactly the same as > in ULTRA2-LVD mode. As Ollivier Robert said, > > Because you have enlarged the _bus_ by two doesn't mean the drive is able > > to move bytes faster from the platters. > > > > You are now able to put more disks before saturating the SCSI bus but bear > > in mind that it is very unlikely that you'll be ever eble to saturate a 80 > > MB/s bus with only one drive. Is this so hard to understand? Making the bus speed faster *will not* magically make the bits come off the platter faster. There is a physical limit here, and *no* amount of bus bandwidth is going to overcome it. Steinar Haug, Nethelp consulting, sthaug@nethelp.no To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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