From owner-freebsd-questions Tue May 25 7: 1: 8 1999 Delivered-To: freebsd-questions@freebsd.org Received: from smtp2.vnet.net (smtp2.vnet.net [166.82.1.32]) by hub.freebsd.org (Postfix) with ESMTP id 218FF14C24 for ; Tue, 25 May 1999 07:01:02 -0700 (PDT) (envelope-from rivers@dignus.com) Received: from dignus.com (ponds.vnet.net [166.82.177.48]) by smtp2.vnet.net (8.9.1a/8.9.1) with ESMTP id KAA14544; Tue, 25 May 1999 10:01:54 -0400 (EDT) Received: from lakes.dignus.com (lakes.dignus.com [10.0.0.3]) by dignus.com (8.9.2/8.8.5) with ESMTP id KAA19480; Tue, 25 May 1999 10:00:57 -0400 (EDT) Received: (from rivers@localhost) by lakes.dignus.com (8.9.2/8.6.9) id KAA05469; Tue, 25 May 1999 10:00:57 -0400 (EDT) Date: Tue, 25 May 1999 10:00:57 -0400 (EDT) From: Thomas David Rivers Message-Id: <199905251400.KAA05469@lakes.dignus.com> To: freebsd-questions@freebsd.org, terry@program-products.co.uk Subject: Re: console terminal server and power loss Cc: rivers@dignus.com In-Reply-To: Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > > Hi Thomas, > > Thanks for the quick answer, > > > I may be wrong, but I thought a on an RS/232 was a 25ms > > drop in the +5v line. When the power goes out, that will be the > > case... so, you get your break. There's not much you can do > > about that... > > That's what I suspected. Do you know which line the +5v is and wether > it is constantly +5. It sounds ugly but maybe I could hold it steady > with a small battery. > > > Why is it that the power goes out on your 386 and not on your sun? > > Can you "plug" the PC into the same power source as your Sun boxes? > > Then, the PC won't go down until the Suns do... > > They're both on an UPS but if the power supply on the PC fails then > I'm stuffed. I should have mentioned that I'd like to scale up the > solution to a dozen or so semi-critical boxes that I'd prefer not to > support overnight or at weekends. > > Cheers, > Terry. Personally, I've only had one power supply fail on a PC, and that's because a screw on the fan came loose, fell down, and shorted it out (what a smell.) But - it can certainly happen. You may be over-engineering though... Here's another question - can you configure the sun Boot proms not to drop into the monitor on a ? I'm not sure if you can or can't - and - if you did, how would you enter the monitor? (Maybe another character, like -@?) But - now that I think about it; I've got a Sun here who's console is a serial console connected to a FreeBSD box... I can turn the FreeBSD box on-and-off without affecting the Sun box... so, it must be doable somehow (this is an old Sun IPC which has the older boot monitor.) Maybe mine is set up in a nice way. You may want to look at the OpenBoot 2.x Command Reference Manual. I just tried it - I can kermit in to the box, and do a break; the machine drops into the monitor.... Something is going on, but I'm not sure what (maybe the Sun only "listens" to the break if CD is on?) Given that - have you tried just turning off the PC and seeing if the Sun machines actually drop into the monitor? - Dave Rivers - To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message