From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([69.77.167.62] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1Jwo7d-0003KB-5E for garchives@archives.gentoo.org; Fri, 16 May 2008 00:48:33 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id DA348E0401; Fri, 16 May 2008 00:48:31 +0000 (UTC) Received: from web31704.mail.mud.yahoo.com (web31704.mail.mud.yahoo.com [68.142.201.184]) by pigeon.gentoo.org (Postfix) with SMTP id 855C0E0401 for ; Fri, 16 May 2008 00:48:31 +0000 (UTC) Received: (qmail 24788 invoked by uid 60001); 16 May 2008 00:48:30 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=Nq68TCFxoZc83UlGhhpzX2XfBjfgtQnz74hQbFTF4fNj5qUPGwWZN90+S0zH//3iORomklKnv5LB1KLSgZe6vdBKeW/wGJdR/yYUJs8uESZeFAa00I7Kxr+7A/ja8gx2ZeoH4GWFPsq3qkN9mXNNNyLNwVe8hDXalrM2V13ODRE=; X-YMail-OSG: 3bl9xUwVM1nFGKpJNuuEKw0QZXatVmVYyvbU9nAqmOh2RtYZcbgI.b2_7wQVMwoY9LpyQYafLcMbqwEWnAofxi1HpKP1AcCS7q8smVjBDRAgm4KnWKR_vZoJttA- Received: from [64.228.98.132] by web31704.mail.mud.yahoo.com via HTTP; Thu, 15 May 2008 17:48:30 PDT X-Mailer: YahooMailWebService/0.7.185 Date: Thu, 15 May 2008 17:48:30 -0700 (PDT) From: maxim wexler Subject: Re: [gentoo-user] UPS recommendation To: gentoo-user@lists.gentoo.org In-Reply-To: <482980C9.2080302@paulscrap.com> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Message-ID: <847198.24766.qm@web31704.mail.mud.yahoo.com> X-Archives-Salt: 704e2b63-035a-4ffe-870e-d36fa00642fd X-Archives-Hash: 8d254d99ea76e5074f497e86a7249cd9 --- On Tue, 5/13/08, PaulNM wrote: > From: PaulNM > Subject: Re: [gentoo-user] UPS recommendation > To: gentoo-user@lists.gentoo.org > Date: Tuesday, May 13, 2008, 4:51 AM > Arthur Britto wrote: >=20 > > You likely want more than a minute. Most likely, you > don't want your > > system to crash when coming back up when power fails > soon after it is > > restored: your system could be in the middle of a > fsck. Generally, you > > want enough capacity to: power off, power on, and then > power off safely. > >=20 > I second this. If the system is busy, it might take a > couple of minutes=20 > before it really shuts down. Ten to fifteen minutes is the > MINIMUM=20 > runtime I'd suggest. As the battery ages, runtime will > lessen, plus it=20 > gives you more room to expand. Power usage does not scale > linearly, if=20 > 200 watt usage lasts X amount of time, 400 watt usage lasts > less than=20 > X/2 and 100 watt is more than 2X. My personal experiences > with power=20 > outages is that they're rare and short, but when they > do occur they=20 > happen a few times during the day/night. This, of course, > may vary from=20 > your area. Another thing to consider is brownouts or volt > dropages. The=20 > ups will kick in if the volt level drops too low (or too > high). If this=20 > happens frequently enough, it will deplete the battery or > wear it out=20 > much more quickly. >=20 > > I am very happy with the CyberPower Intelligent LCD > Series: CP*AVRLCD > > http://www.cyberpowersystems.com/ > >=20 > > The series has: > >=20 > > NUT support: > > =EF=BB=BFYou want something that works with NUT. Instead of > a vendor specific > > package. This way your acquired skills are portable > and future proofed. > > Network UPS Tools > > http://eu1.networkupstools.org > > NUT is great. It safely powers off my system when the > UPS is low. > > Additionally, I set it up to e-mail my cell phone when > the power state > > changes. If I go out during a power outage, I can > stay out longer if I > > know the power is not restored. >=20 > My personal experience has been with APC equipment, but > CyberPower is=20 > also a great maker. I also second NUT. It's a better, > more flexible=20 > framework that supports just about any decent ups. >=20 > >=20 > > USB interface: > > * =EF=BB=BFA USB port is more future proof: serial ports are > becoming rare. =20 > > * Allows monitoring UPS state. > > * Allows powering off the UPS. > >=20 > USB is almost mandatory now. Serial ports are usually only > on high-end=20 > expensive models, and (almost) never on what you'll > find in stores. >=20 > > LCD Display: > > At a touch know: > > * power consumption (don't need to pull out a > Kill-O-Watt) > > * battery charge > > * estimated minutes remaining > >=20 >=20 > Before spending extra on anything with an LCD, google the > model or lcd=20 > errors first. I've seen reports that they tend to be > inaccurate,=20 > especially with APC. Mine under reports watt usage by a > significant=20 > amount, somewhere between 1/3 to 2/3 of actual usage(I > forget what my=20 > tests with various light bulbs showed). This was testing > the ups with=20 > only a small lamp plugged in, everything else UNPLUGGED > (not just off).=20 > I also used several light bulbs since they can vary a > little. >=20 >=20 > > One thing to be wary of is like most inexpensive UPSes > it does not > > provide a pure sine wave. This can damage a power > supply that has > > active power factor correction. Luckily for my > Silencer 750 Quad > > according to the manufacturer due to the short time in > which the UPS is > > in use it is not an issue. > >=20 > > -Arthur > >=20 > >=20 >=20 > PaulNM > --=20 > gentoo-user@lists.gentoo.org mailing list Thanks for your exhaustive replies. I've decided to go for the APC ES-350 f= or seventy bucks at the local Staples. Mostly because I could pack it home = on my bike and avoid the shipping charges which are huge for heavy things, = like UPS systems. According to the table on the back of the box I get 6min = with a 15in LCD monitor, so I should get slightly more with no monitor atta= ched. I don't care if I don't save something or have to abort a compile in = mid-stream. What I'm afraid of his having the power cut out while the r/w h= ead of the hard drive is in motion. That can't be good. -mw=0A=0A=0A -- gentoo-user@lists.gentoo.org mailing list