Return to BSD News archive
Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.mel.connect.com.au!news.syd.connect.com.au!phaedrus.kralizec.net.au!news.mel.aone.net.au!grumpy.fl.net.au!news.webspan.net!newsfeeds.sol.net!hammer.uoregon.edu!arclight.uoregon.edu!newsfeed.direct.ca!nntp.portal.ca!cynic.portal.ca!not-for-mail From: cjs@cynic.portal.ca (Curt Sampson) Newsgroups: comp.os.linux.misc,comp.os.linux.setup,comp.unix.bsd.bsdi.misc,comp.unix.bsd.misc Subject: Re: IDE vs SCSI (was Re: Linux vs BSD) Date: 23 Jan 1997 12:46:09 -0800 Organization: Internet Portal Services, Inc. Lines: 20 Message-ID: <5c8imh$4b8@cynic.portal.ca> References: <32DFFEAB.7704@usa.net> <5c155c$p6u@raven.eva.net> <87k9p4rckd.fsf_-_@murkwood.gaffaneys.com> <5c8a39$7tn@usenet.srv.cis.pitt.edu> NNTP-Posting-Host: cynic.portal.ca Xref: euryale.cc.adfa.oz.au comp.os.linux.misc:152437 comp.os.linux.setup:92244 comp.unix.bsd.bsdi.misc:5603 comp.unix.bsd.misc:1916 In article <5c8a39$7tn@usenet.srv.cis.pitt.edu>, Mark Hahn <hahn@neurocog.lrdc.pitt.edu> wrote: >where tagged queueing would give SCSI an advantage is those >places where naive elevator sorting (by block number) doesn't work: >lower-numbered blocks within the current cylinder and bad-block >remapping. Actually, it should give an advantage in latency on busy drives; the drive, after transferring data to the controller, does not have to wait to receive a new command before starting its next seek. In fact, on drives with a reasonably large buffer cache, the drive could start the next seek even before transferring the data read after the seek to the host controller. cjs -- Curt Sampson cjs@portal.ca Info at http://www.portal.ca/ Internet Portal Services, Inc. Vancouver, BC (604) 257-9400 De gustibus, aut bene aut nihil.