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Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!msunews!uchinews!vixen.cso.uiuc.edu!howland.reston.ans.net!swrinde!elroy.jpl.nasa.gov!decwrl!vixie!nnrp!vixie From: vixie@gw.home.vix.com (Paul A Vixie) Newsgroups: comp.unix.bsd.bsdi.misc Subject: Re: 10 Mbs FAST SCSI-ii Date: 15 Jun 1995 19:55:46 GMT Organization: Vixie Enterprises Lines: 13 Message-ID: <VIXIE.95Jun15125546@gw.home.vix.com> References: <3rph03$m2e@gold.interlog.com> NNTP-Posting-Host: gw.home.vix.com In-reply-to: ryan@interlog.com's message of 15 Jun 1995 10:44:19 -0400 The kernel messages that say "5MB/s" for scsi drives are not measuring the rate, they are reporting what the SCSI host adaptor says. The Buslogic adaptors use the Adaptec-1542's response codes, and the fastest magic cookie they can give the kernel is the one corresponding to "5MB/s". Don't worry about this, it's just a message. The actual cable bit rate is generally going to be lots higher. Only a command like "dd if=/dev/zero of=/dev/rsdNNc bs=1024k count=50" will tell you for sure. (Don't run that on a disk containing data, of course.) -- Paul Vixie La Honda, CA "Illegitimi non carborundum." <paul@vix.com> pacbell!vixie!paul (dont let the bastards grind you down)