Article View: comp.sys.ibm.pc.hardware.misc
Article #622Re: Is it possible to actually get a 16 MB/sec data transfer rate w/ an EIDE drive?
From: Mark Hahn
Date: Thu, 04 Dec 1997 00:00
Date: Thu, 04 Dec 1997 00:00
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: I'm not sure I understand you comment here, but if you're : suggesting that IDE drives can do multiple requests, I disagree : 100%. SCSI drives can re-order requests to meet the physical : limitations of the drive. I've seen no evidence that IDE drives : can do this. I woulldn't expect it either. there's limited opportunity for tagged command queueing to provide any benefit, since reasonable OSs already sort device request queues. do you have some evidence that TCQ is a major win? remember that ATA drives already do readahead and write-behind in nontrivial-sized caches. regards, mark hahn. -- operator may differ from spokesperson. hahn@neurocog.lrdc.pitt.edu http://neurocog.lrdc.pitt.edu/~hahn/
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 1036bc,aad589958d8c66fd X-Google-Attributes: gid1036bc,public X-Google-Thread: f4d7c,aad589958d8c66fd X-Google-Attributes: gidf4d7c,public X-Google-Thread: f5f89,aad589958d8c66fd X-Google-Attributes: gidf5f89,public X-Google-Thread: 1045b9,aad589958d8c66fd X-Google-Attributes: gid1045b9,public X-Google-Thread: 109e38,aad589958d8c66fd X-Google-Attributes: gid109e38,public From: hahn@neurocog.lrdc.pitt.edu (Mark Hahn) Subject: Re: Is it possible to actually get a 16 MB/sec data transfer rate w/ an EIDE drive? Date: 1997/12/04 Message-ID: <665bgq$el7@usenet.srv.cis.pitt.edu> X-Deja-AN: 295067145 References: <65l4hv$1hv@bgtnsc03.worldnet.att.net> <01bcfd55$9845f3e0$900189ca@jake> <34816ebd.3850196@news.demon.co.uk> <34819d72.9334338@news.jps.net> <6616i1$ltq@bgtnsc03.worldnet.att.net> <pLMYl5dhX7hK-pn2-pdwb0nxqCNSV@ALEX> Followup-To: comp.sys.ibm.pc.hardware.misc,comp.sys.ibm.pc.hardware.chips,demon.tech.pc,alt.comp.hardware,comp.sys.ibm.pc.hardware.storage Organization: Learning Research and Development Center at U. of Pittsburgh Newsgroups: comp.sys.ibm.pc.hardware.misc,comp.sys.ibm.pc.hardware.chips,demon.tech.pc,alt.comp.hardware,comp.sys.ibm.pc.hardware.storage