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Article #130Re: Which SCSI? Q-FireBall - IBM Deskstar - Conner CFP
From: Chuck Tribolet
Date: Mon, 13 Nov 1995 21:58
Date: Mon, 13 Nov 1995 21:58
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1653 bytes
In <484v2o$qvq@fox.almaden.ibm.com>, triblet@almaden.ibm.com (Chuck Tribolet) writes: >In <4806r6$5o2@decaxp.harvard.edu>, bb@wjh.harvard.edu (Brent Byer) writes: >> >>Could you please explain that 3.2 vs 4.1 confusion. >>Have I made another bad-ass umption ? > >Good question. I'll check with our performance wizard Monday. Head settle times >can be non-trivial. The following things affect the difference between raw data rate and sustained data rate: - The time required for various overhead data like servo and ID information. - The time required to handle bad sectors. - Head switch time, including head settle. - Cylinder switch time (ie, seek to next cylinder). Note that some drives make a small mechanical move when they switch heads. This is done evenly distribute the physical seek time, which makes video servers happier. Chuck Tribolet San Jose, CA Silicon Valley - best day job in the world
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Path: arc1-ca.pugleaf.net!fox.almaden.ibm.com!usenet From: triblet@almaden.ibm.com (Chuck Tribolet) Newsgroups: comp.sys.ibm.pc.hardware.storage,comp.periphs.scsi Subject: Re: Which SCSI? Q-FireBall - IBM Deskstar - Conner CFP Date: 13 Nov 1995 21:58:24 GMT Organization: IBM Almaden Research Center Distribution: world Message-ID: <488f20$fa6@fox.almaden.ibm.com> References: <47hbpo$467@peach.america.net> <47ommk$d1v@nz12.rz.uni-karlsruhe.de> <47tbk2$ktb@decaxp.harvard.edu> <47vle9$5hi@fox.almaden.ibm.com> <4806r6$5o2@decaxp.harvard.edu> <484v2o$qvq@fox.almaden.ibm.com> Reply-To: triblet@almaden.ibm.com (Chuck Tribolet) NNTP-Posting-Host: triblet1.almaden.ibm.com X-Newsreader: IBM NewsReader/2 v1.2