Re: Request for UPS info
You can replace PC + UPS system by a laptop with external monitor and with (USB) keyboard and mouse. Then you will have up to three hours of power protection:). You definitely need to select a laptop with adequate CPU/GPU/NIC for your tasks. Current (Dec 2007) Debian unstable works fine on laptops with Intel CPU/GPU/NICs. Moshe. Omer Zak wrote: On Mon, 2007-12-03 at 19:31 +0200, Geoff Shang wrote: 1. I'm guessing that there are two issues when it comes to UPSs - power output and how long that power can be delivered before draining the bateries. How much power will I need and is there a target length of time I should aim for? Does one factor influence price more than the other? Actually, UPSes are rated in terms of volt-amper rather than power (in watts). This is because UPSes need to deliver also reactive power (which happens when voltage and current are not in phase). I would aim at 200 volt*amper per PC to be protected. UPSes generally deliver only few minutes' power. At the time I looked for an UPS which can power a FAX machine (much lower standby power consumption than PCs) for hours - but in vain. To deliver more power, you may need a generator powered by motor. This time should be enough for orderly power-down of the computers. 3. What are typical prices for UPSs in Israel? I saw an ad for some products today but I don't know how well they compare to prices generally (no brands mentioned, which was interesting in itself). When I was in the market for UPSes, they had 3-digit cost in US$. 4. The ad mentioned above also mentioned surge protection. Is this a typical UPS feature? Depends. For full protection, you would need on-line type of UPSes (a bit more expensive). That's probably enough questions for anyone who wants to answer. I've never laid hands on a UPS so am not sure what to expect when I get one, but I'm guessing that there's a UPS howto out there somewhere which should at least tell me what to expect on the LInux side of things. There used to be an UPS HOWTO, written by Harvey Stein (remembered by the Linux-IL oldtimers). But it was several years ago. You can also expect an UPS to be heavy - it usually contains lead-acid batteries. --- Omer (who has two UPSes, one powers his FAX machine, and the other - his computers) -- Moshe Gorohovsky A6 CC A7 E1 C2 BD 8C 1B 30 8E A4 C3 4C 09 88 47 Tk Open Systems Ltd. --- - [EMAIL PROTECTED] - tel: +972.2.679.5364, http://www.tkos.co.il - = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Request for UPS info
Hi, Recently I've seen some posts about UPSs. Due to my inability to work with Hebrew websites thanks to not knowing the language well enough yet, I'd like to get some information about UPSs generally rather than a product recommendation in the form of a URL. A recommendation of a brand and/or model is of course welcome if you tell me why. The situation here is that my wife and I have a small home office with 3 PCs but no monitors (we are both blind so we don't need one), plus some additional sound equipment and other office bits and pieces (though I guess they don't strictly have to be on the UPS). Here is what I'd like to know: 1. I'm guessing that there are two issues when it comes to UPSs - power output and how long that power can be delivered before draining the bateries. How much power will I need and is there a target length of time I should aim for? Does one factor influence price more than the other? 2. Do I need to look out for any specific features when considering Linux compatibility or do most UPSs work nowadays? 3. What are typical prices for UPSs in Israel? I saw an ad for some products today but I don't know how well they compare to prices generally (no brands mentioned, which was interesting in itself). 4. The ad mentioned above also mentioned surge protection. Is this a typical UPS feature? That's probably enough questions for anyone who wants to answer. I've never laid hands on a UPS so am not sure what to expect when I get one, but I'm guessing that there's a UPS howto out there somewhere which should at least tell me what to expect on the LInux side of things. Any help is most appreciated. We've had our machines shut down about 6 times in the last week or so and we're sick of it. Geoff. = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Request for UPS info
On Mon, 2007-12-03 at 19:31 +0200, Geoff Shang wrote: 1. I'm guessing that there are two issues when it comes to UPSs - power output and how long that power can be delivered before draining the bateries. How much power will I need and is there a target length of time I should aim for? Does one factor influence price more than the other? Actually, UPSes are rated in terms of volt-amper rather than power (in watts). This is because UPSes need to deliver also reactive power (which happens when voltage and current are not in phase). I would aim at 200 volt*amper per PC to be protected. UPSes generally deliver only few minutes' power. At the time I looked for an UPS which can power a FAX machine (much lower standby power consumption than PCs) for hours - but in vain. To deliver more power, you may need a generator powered by motor. This time should be enough for orderly power-down of the computers. 3. What are typical prices for UPSs in Israel? I saw an ad for some products today but I don't know how well they compare to prices generally (no brands mentioned, which was interesting in itself). When I was in the market for UPSes, they had 3-digit cost in US$. 4. The ad mentioned above also mentioned surge protection. Is this a typical UPS feature? Depends. For full protection, you would need on-line type of UPSes (a bit more expensive). That's probably enough questions for anyone who wants to answer. I've never laid hands on a UPS so am not sure what to expect when I get one, but I'm guessing that there's a UPS howto out there somewhere which should at least tell me what to expect on the LInux side of things. There used to be an UPS HOWTO, written by Harvey Stein (remembered by the Linux-IL oldtimers). But it was several years ago. You can also expect an UPS to be heavy - it usually contains lead-acid batteries. --- Omer (who has two UPSes, one powers his FAX machine, and the other - his computers) -- One does not make peace with enemies. One makes peace with former enemies. My own blog is at http://www.zak.co.il/tddpirate/ My opinions, as expressed in this E-mail message, are mine alone. They do not represent the official policy of any organization with which I may be affiliated in any way. WARNING TO SPAMMERS: at http://www.zak.co.il/spamwarning.html = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
