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Article #321Re: SCSI/IDE and RAID [Was: 120 gb is the Largest hard drive I can put in my 4550?]
From: Rod Speed
Date: Sat, 06 Dec 2003 06:28
Date: Sat, 06 Dec 2003 06:28
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2841 bytes
"Cristian Croitoru" <c_croitoru@hotmail.com> wrote in message news:bqrsil$2605md$1@ID-199004.news.uni-berlin.de... > > Me > > >Speaking of speed and not being particularly familiar with the SCSI > > >protocol, my common sense tells me that having a stripe on a IDE > > >multichannel controller can push the speed quite some way.. > > >Again my common sense tells me that a SCSI controller can not stream data > > >from more than one drive at a time, as only one drive can put data on the > > >bus at the same time > "derek: > > Your common sense failed this time. > > With a SCSI ALL disks can read or write at the same time. > > That is one of the strengths of scsi > > > > Of course, at home you will have trouble using this strength. > Well, I have tried to understand HOW, how is posibile for multiple > devices to send electrical signals on the same wire in the same time.. > How is this possible form the electrical point of view? It isnt, he's got that completely wrong. > With separate channels you have separate > buses, separate electrical paths; Correct. > the data of the stripe is rebuilt in the controller's > logic but essentialy the logical path is 6 times wider. Correct. > I am not trying my skills in retorics, I am just trying to understand.. He's got it completely wrong. You have it right.
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10a33e,6ed78a31a4e7545b X-Google-Attributes: gid10a33e,public X-Google-Thread: 108c83,a18eb837a8bad5bc X-Google-Attributes: gid108c83,public X-Google-ArrivalTime: 2003-12-05 22:28:41 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news2.google.com!fu-berlin.de!uni-berlin.de!m065-139.nv.iinet.net.AU!not-for-mail From: "Rod Speed" <rod_speed@yahoo.com> Newsgroups: alt.sys.pc-clone.dell,aus.computers Subject: Re: SCSI/IDE and RAID [Was: 120 gb is the Largest hard drive I can put in my 4550?] Date: Sat, 6 Dec 2003 17:28:38 +1100 Lines: 37 Message-ID: <bqrsun$25lul5$1@ID-69072.news.uni-berlin.de> References: <bo3tsvkujsuj8drknu96kghqnm1fphardi@4ax.com> <zHwzb.21159$UG2.949@nwrdny03.gnilink.net> <PYmdnfxD5JBSBFOiRVn-jA@comcast.com> <iAxzb.6666$t87.2004@nwrdny02.gnilink.net> <bqnifj$24q680$1@ID-151056.news.uni-berlin.de> <bqo7c0$2592sq$1@ID-69072.news.uni-berlin.de> <WoOzb.8088$t87.2270@nwrdny02.gnilink.net> <bqosd5$25fd2e$1@ID-69072.news.uni-berlin.de> <JfadnTpCjM1AmEyiU-KYkQ@giganews.com> <bqr36q$250h5r$1@ID-199004.news.uni-berlin.de> <c4q2tv0g64nsm7foapaq463c5aheom3420@4ax.com> <bqrsil$2605md$1@ID-199004.news.uni-berlin.de> NNTP-Posting-Host: m065-139.nv.iinet.net.au (203.217.65.139) X-Trace: news.uni-berlin.de 1070692120 73071269 203.217.65.139 ([69072]) X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165