From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from tcsnpop1.tcsn.uswest.net ([207.108.112.1]) by speech.braille.uwo.ca with smtp (Exim 3.32 #1 (Debian)) id 166g95-0002MY-00 for ; Wed, 21 Nov 2001 17:47:07 -0500 Received: (qmail 79256 invoked by uid 50); 21 Nov 2001 22:47:08 -0000 Received: (qmail 79247 invoked by uid 0); 21 Nov 2001 22:47:08 -0000 Received: from tcsndslgw4poola219.tcsn.uswest.net (HELO lightstar) (63.227.85.219) by tcsnpop1.tcsn.uswest.net with SMTP; 21 Nov 2001 22:47:08 -0000 Content-Type: text/plain; charset="iso-8859-1" From: Jason To: speakup@braille.uwo.ca Subject: Re: drive assignments Date: Wed, 21 Nov 2001 15:47:42 -0700 X-Mailer: KMail [version 1.2] References: In-Reply-To: MIME-Version: 1.0 Message-Id: <01112115474200.02842@lightstar> Content-Transfer-Encoding: 8bit Sender: speakup-admin@braille.uwo.ca Errors-To: speakup-admin@braille.uwo.ca X-BeenThere: speakup@braille.uwo.ca X-Mailman-Version: 2.0.6 Precedence: bulk Reply-To: speakup@braille.uwo.ca List-Help: List-Post: List-Subscribe: , List-Id: Speakup is a screen review system for Linux. List-Unsubscribe: , List-Archive: > /hdc is primary drive on the second IDE controler, /hdd would be the slave > drive on the second controler. See the pattern? The same pattern would > hold for SCSI drives however, I'm not sure if you would be limitted to two > drives per SCSI controler. I don't have any SCSI hard drives here so not > very familiar with SCSI protocols. > SCSI basically works the same way. The only difference is that the drives are "lettered" in the order they are detected, starting with controller 1, ID 0, LUN 0. So /dev/sda is the device with the lowest ID number on the first controller, regardless of the actual ID number. There is one caveat, the actual SCSI controller, while it has an ID number is not given a device node (though this may bi different if your kernel includes the "devfs" package. Also, as a feature, there are /dev/scd? devices, for CDROM, CD-R(W) and DVD drives on your SCSI busses, these are numbered in the order detected starting with 0, otherwise the same way hard drives are. These are in addition to, not in place of, the /dev/sd? entries. There are also "SCSI Generics" available, these are listed as /dev/sg?, and again, numbered in the order detected, atarting with 0 (seeing a pattern here?). SCSI generics include things such as SCSI-based scanners, CD-R and CD-RW drives and things such as that (yes, this can mean that a single CD drive will be listed three times if it's recordable, or twice if not). If anyone actually needed that information, I hope it helped, if not, I hope it was at least interesting ;-)