Date: Wed, 15 Sep 2004 18:49:59 -0400 (EDT) From: Charles Sprickman <spork@bway.net> To: freebsd-scsi@freebsd.org Subject: backplane identification Message-ID: <Pine.OSX.4.61.0409151814370.933@oof.local>
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Hi, This is kind of a long shot, but I figure there might be some people here that can give me a hand. I have a problematic box from a vendor called "Einux". Not my choice, it was already here, it was expensive, and I needed to use it for our mail server. It's running FreeBSD 4.8p-something, and has an Adaptec 2110S single-channel raid controller with 4 drives in a 1+0 setup. IBM drives (blech). The controller has been dropping drives left and right. Adaptec has little to say, and we have four new Seagate Cheetah's waiting to be installed anyhow. But now I'm getting curious about the scsi backplane in this thing. There's no docs, and Einux has apparently disappeared from the business. I did dig up a phone number for them, and got a bit of info about the backplane. (http://web.archive.org/web/20011230060219/einux.com/A2200.html) Perhaps someone can help me identify it... The case is 2U, with 3 drives stacked on each other in one backplane, 3 more in another. Each backplane has two scsi connectors, and no indication of whether it auto-terminates or not. I'm kind of screwed with no docs here, so any "intuition" anyone might have about these backplane setups would be most appreciated. The way everything is cabled now is: raid controller->first backplane unit->second backplane unit->active terminator (one cable). Looking more closely, those backplanes should probably be chained: raid controller->top connector of first backplane (one cable), bottom connector of first backplane -> top connector of second backplane, then possibly a terminator hanging off of the bottom connector of the second backplane. Sorry for being so far OT, if anyone has ideas as to where else to post, I'm all ears. Googling for "einux" and "backplane" doesn't turn up anything of interest. Thanks, Charles ___ Charles Sprickman NetEng/SysAdmin Bway.net - New York's Best Internet - www.bway.net spork@bway.net - 212.655.9344
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