Date: 25 May 1999 17:00:48 +0100 From: Terry Glanfield <terry@program-products.co.uk> To: Thomas David Rivers <rivers@dignus.com> Cc: freebsd-questions@freebsd.org Subject: Re: console terminal server and power loss Message-ID: <eaeutt9zj.fsf@program-products.co.uk> In-Reply-To: Thomas David Rivers's message of "Tue, 25 May 1999 10:00:57 -0400 (EDT)" References: <199905251400.KAA05469@lakes.dignus.com>
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Thomas David Rivers <rivers@dignus.com> writes: > 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... Its probably overkill but I'd rather get it right than pay the consequences later. > Here's another question - can you configure the sun Boot proms > not to drop into the monitor on a <break>? I'm not sure if you > can or can't - and - if you did, how would you enter the monitor? > (Maybe another character, like <cntrl>-@?) I've not found anything along those lines but will keep on looking. > 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. Great, at least its possible. What serial card are you using in that box? I've tried a couple of 16450s and 16550As both of which send a break when powered down. I've yet to dig deeper into the OpenBoot manual but will do so overnight. > 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?) I've tried various combinations of ttya-ignore-cd and ttya-rts-dtr-off without luck. Could you send me you eeprom settings? Maybe there's something I haven't spotted. My hope now is that there is a serial card out there which will leave the circuit open when the power it dropped rather than dragging the line down to zero. Any takers? Cheers, Terry. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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