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  • UPS power requirements for server

    - by captainentropy
    Greetings! So, I just placed an order for a new server. The company recommended that I get a 3000W UPS. (!) As best as I could I calculated the following wattage consumption based on benchmarked data or datasheets provided by the manufacturers of each component: number watts **total watts** MoBo 1 240 240 CPUs (E5540) 2 80 160 RAID cards (3ware) 2 18 36 RAM (6x4GB) 6 3 18 DVD drive 1 7 7 floppy 1 2 2 RE4 drives 8 7 56 WD20 drives 8 6 48 Intel X25 SSD 2 0.15 0.3 total = 567 So that is for the PSU requirements only. The PSUs in the machine are a 720W for the master node and 800W each for two subsystems. That's a total of 2320W that can be delivered by these PSUs. But that is 4X the amount being consumed, at most, by the components. I didn't count case fans or the eSATA card (3W maybe?) or what the PSUs themselves require but assuming I double or triple my calculations I'm not even remotely close to the 3000W UPS I was suggested to get. They run at least $1100. I could get a 2000W for about $750 or a 1500W for $450 and still be well over my estimated power need. I don't think I need a whole lot of run time in the case of a power outage, maybe 20 minutes max, enough time to shutdown if the power doesn't come on within 5-10 minutes. Any thoughts? Am I off on my calculations? Did I overlook something major? If so what are your suggestions for a UPS? Thanks!

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  • APC ups es 700 randomly overload

    - by Matteo Mosca
    First of all, I live in Italy, Europe, so keep this in mind for Volt/Watt considerations. Standard voltage in Italian apartments is 220V. In my living room I have 2 APC ups, one being an ES-550 and the other an ES-700 They each have 4 slots for surge protection only, and 4 slots for surge protection + battery backup. Just to give all the information, they both got their battery replaced less than one month ago. The ES-550 works fine, without any problem. On the battery I have connected: Pc Monitor Sony Bravia 46'' 4th slot is empty The ES-700 has the following on battery: Xbox 360 Ps3 (standby when not used) Wii (standby when not used) Netgear 8 port switch (always on) Here's what happens: the ES-700, randomly, but mostly at night when I'm sleeping, goes like "overload", with the constant beep. If I try to shut it off keeping the power button pressed, nothing happens. The only thing that works is unplugging random stuff (sometimes unplugging 1 console works, other times I have to unplug all 4 devices). Every time this happens the problem is "real", meaning the 4 devices become unpowered, so it's not just an "alarm no working properly" problem. While I'm sleeping, of course, the power usage is what described on the list, 2 devices on standy, 1 off and 1 on. Today it happened again while I was playing with my Ps3. I unplugged it, problem went away. I plugged it again, and it kept working fine. I just can't figure out what's the problem. The only additional info I can provide is that this behaviour started after a big power outage last december 26 (a blackout that lasted almost all day) but the "surge protection" part of those UPS should be there for those problems, to leverage peaks when power goes away or gets restored. Another funny thing is, althought it might not be related, for a couple of days after that event the Wii was unable to power on, I thought its power transformer was broken, but then it suddenly started working again. I can be sure it's not the Wii overloading the UPS because the overload happens even if I leave the Wii unplugged. Any suggestion is really appreciated, and I can provide any additional info, if needed, that didn't come to mind right now. Thanks.

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  • Is UPS worthwhile for home equipment?

    - by Jon Skeet
    Over the years, I've had to throw away a quite a few bits of computing equipment (and the like): Several ADSL routers with odd symptoms (losing wireless connections, losing wired connections, DHCP failures, DNS symptoms etc) Two PVRs spontaneously rebooting and corrupting themselves (despite the best efforts of the community to diagnose and help) One external hard disk still claiming to function, but corrupting data One hard disk as part of a NAS raid array "going bad" (as far as the NAS was concerned) (This is in addition to various laptops and printers dying in ways unrelated to this question.) Obviously it'll be impossible to tell for sure from such a small amount of information, but might these be related to power issues? I don't currently have a UPS for any of this equipment. Everything on surge-protected gang sockets, but there's nothing to smooth a power cut. Is home UPS really viable and useful? I know there are some reasonably cheap UPSes on the market, but I don't know how useful they really are. I'm not interested in keeping my home network actually running during a power cut, but I'd like it to power down a bit more gracefully if the current situation is putting my hardware in jeopardy.

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  • UPS recommendations for three grey boxes?

    - by Margaret
    Hey all We have a series of grey-box style computers acting as servers at my workplace (rather than rack-mount). We were looking to get Uninterruptible Power Supplies for them. However, I'm not sure how many at what capacity are required. I'd assume it would be a good idea to hook the peripherals in as well - there's a 18.5" LCD monitor with a KVM, along with a couple of USB hard drives that require power. I currently have the most vital machine hooked up to a cheap (temporary) UPS, but it's probably close to worse than nothing. I'm looking for reasonable value for money, though I can probably negotiate with my boss on price range. I recognise that I may well need to buy two (or even three) UPSs to support the three machines. Any recommendations?

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  • APC UPS-5000 Power off remote servers

    - by Vishal
    Hi there, I have a UPS connected via the serial port to a server using PowerChute Business Edition. If a power outage occurs I would like this server to start shutting down all other servers within the network. Is there dedicated software to do this? I was thinking of creating a command file which runs a .bat file to run shut down commands to each server (using PSExec). I can set PowerChute to run this command file when a power failure occurs. Is there not anything APC provide which has this functionality and is more efficient than writing a .bat file to do this? Thanks,

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  • external pop email relay

    - by Pixman
    I want to offer to my customer this possibility : get her pop3 emails from external pop3 server forward the news emails to the new external pop3 server I have find lot of tools for sync imap accounts, or sync pop to imap, but i just want get pop and send to another email adress ! I search a answer for linux ( if i can make a simple daemon for make it's it's good ). Thanks a lot for your help. edit for more detail : For simplify my question, in my use case, it's just want to connect as client via pop protocol ( like a mail app ). And i check news emails, and forward to other email adress. I search about an app or code for create this on linux. In this situation have no access to mailbox dirs, or server configuration ( in this case i have already the answer by create a qmail hook ) Maybe, it's not the good website ? my question must be post on the stackoverflow part ?

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  • Benefits of a RAID BBU in addition to a double UPS + PS system

    - by Wikser
    Today I roughly measured the benefits of enabling write-back on the RAID controller on a server at work. It got no RAID battery-backup-unit (BBU) so the write-cache is currently disabled. As the server is not used to capacity (by far), the results in most test were spectacular, e.g.: Database CRUD: before 35s, after 4s Saving a 1MB Excel file: before: 20s (!), after: 0.5s Of course having a BBU is always recommended, but what are the main benefits of installing a BBU to a system, which got redundant power supplies and is attached to UPSs? Does this depend on the type of the system (database, file, terminal)? What is a realistic fail scenario which could be prevented by a BBU? Thanks in advance!

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  • UPS: Do i require a special extension cord for power in?

    - by rism
    I have a couple of Tripplite UPS systems. The power in cables are bright orange and about 2 meters in length. I want to put the system on the other side of the room but for some reason the UPS keep "going off" over there. So I guess the wall power sockets on that side of the room are a little dodgy. So i figured Id just go online and get some replacement UPS power IN (from wall to UPS) cables of an appropriate length. But i cant find any anywhere. (auction sites, tripplite store, cable websites). So now I'm wondering if that's just because you can use a standard extension cord of an appropriate wattage? I thought the UPS power IN cables were "special". Is that not so?

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  • How to decode U.P.S. Information from UPS MaxiCode Barcode?

    - by user46482
    I recently purchased a 2D Barcode reader. When scanning a U.P.S. barcode, I get about half of the information I want, and about half of it looks to be encrypted in some way. I have heard there is a UPS DLL. Example - Everything in bold seems to be encrypted, while the non-bold text contains valuable, legitimate data. [)01961163522424800031Z50978063UPSN12312307G:%"6*AH537&M9&QXP2E:)16(E&539R'64O In other words, this text seems OK - and I can parse the information [)01961163522424800031Z50978063UPSN123123 ... While, this data seems to be encrypted ... 07G:%"6*AH537&M9&QXP2E:)16(E&539R'64O Any Ideas???

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  • Why PC reboots when there’s a power failure even with UPS?

    - by Jamil
    I've purchased a Line Interactive UPS 1200VA. It's supposed to give 8~20min backup (as written in the manual). This UPS has transfer time < 10ms. It works fine when the mains is active. But the problem is that when the power went off, the PC also went off for a fraction of a second and started rebooting. The strangest thing though is that it has to be a proper power failure by the service supplier. If I just turn off the power at the wall plug, the UPS kicks in immediately and the PC carries on working fine. What's the solution of that? What should I do? My hard drive was physically damaged because of improper shut down & restart. I've 5~8 times power outage in my country so I badly need an UPS.

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  • Is the APC BR700G UPS (or similar) compatible with Active PFC power supplies?

    - by David Zaslavsky
    I'm looking at getting a UPS for my home computer. So far the APC BR700G looks very promising, except for one thing: one of the reviews on Newegg says that this UPS does not work with a power supply with Active PFC. Pros: Unit looks great, built well, very heavy, was excited to use it. Cons: Didn't research enough - many newer power supplies like my corsair 750w (and yes dells and other mainstreamers sell them too) that I bought last year have a feature called active pfc (power factor corrected). The signal for this backup battery doesn't fully support that feature and can cause issues. You can find an article on APCs site if you search their user forums for PFC. And the power supply in my computer is, in fact, an Active PFC PSU. I've already found one answer on this site claiming that it's not an issue, that "most quality supplies these days have PFC and work just fine with a UPS." That disagrees with the review on Newegg. Can someone explain this discrepancy? Also, what is it exactly about a UPS that makes it incompatible with an Active PFC PSU? (if anything) Is there some way to tell based on the technical specifications, or do I just have to hunt for reviews online to avoid wasting my money? While any input would be appreciated, I would prefer to get an answer from someone with actual experience with similar UPS's and Active PFC power supplies, who can tell me whether it works or not.

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  • Are Uninterruptible Power Supply (UPS) at home really a worthwhile investment for home computing? [c

    - by Jian Lin
    Possible Duplicate: Is a UPS a good investment for a home machine? I have 2 Uninterruptible power supplies at home, but they seem to expire after 5 years or so. During this 5 years, it maybe saved the computer from turning off twice. But I wonder, I often save my documents every 10 minutes. So the most I can lose is 10 minute worth of work. Not to mention that, I may not be editing anything when the power is out. Also, when the UPS expires, one of them will give out beeping sound once in a while, probably signaling the changing of the battery. So I can either buy 2 new UPS or just buy 2 power outlets instead. 2 UPS, costing $160 to $250 roughly, can it be really worth it if it can save your computer from powering off for just 2 times? What are the alternatives?

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  • Linked List pop() function

    - by JKid314159
    Consider the following list: [LinkNode * head -- LinkNode * node1 -- LinkNode * node2] I'm creating a stack of FIFO. I Call pop() which I want to pop node1. LinkNode::LinkNode(int numIn) { this->numIn = numIn; next = null; } . . . int LinkNode::pop() { Link * temp = head->next; head = temp->next; int popped = head->nodeNum; delete temp; Return numOut; Question: 1) head should be a pointer or a LinkNode *? 2) Link * temp is created on the call stack and when pop finishes doesn't temp delete automatically? 3) My major confusion is on what is the value of temp-next? Does this point to node1.next which equals node2? Appreciate your help? My reference is C++ for Java Programmers by Weiss.

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  • POP Forums v9 Beta 1 for ASP.NET MVC 3 posted to CodePlex!

    - by Jeff
    As promised, I posted a beta build of my forum app for ASP.NET MVC 3. Get the new goodies here: http://popforums.codeplex.com/releases/view/58228 This is the first beta for the ASP.NET MVC 3 version of POP Forums. It is nearly feature complete, and ready for testing and feedback. For previous release notes, look here, here and here.Check out the live preview: http://preview.popforums.com/ForumsSetup instructions are on the home page of this project. The new hotness in the beta, or what has been done since the last preview: All views converted to use Razor E-mail subscription/notification of new posts New post indicators/mark read buttons Permalinks to posts Jump to newest post (from new post indicators) Recent topics Favorite topics Moderator functions for topics (pin/close/delete, plus move and rename) Search, ported from v8. Not a ton of optimization here, or new unit testing, but the old version worked pretty well User posts (topics the user posted in) Forgot password Vanity items (signatures and avatars) Hide vanity items per user preference Some minor data caching where appropriate A little bit of UI refinement Lots-o-bug fixes Lots-o-unit tests What's next? The plan between now and the next beta is as follows: Continue working through features/tasks, and fix bugs as they're reported Integrate the forum into a real, production site Refine the UI Refactor as much as possible... the code organization is not entirely logical in some places After the second beta, a release candidate will follow, with a real "final" release after that. Subsequent releases should come relatively frequently and without a lot of risk. The trick in building this thing has been that it mostly tossed the previous WebForms version, which was all full of crusties. The time table for this is a little harder to pin down, as day jobs and families will have their effect. Other notes Refactoring will be a priority. As the features of MVC have evolved, so have my desires to use it in a fashion that makes things clear and easy to follow. I don't even know if anyone will ever start mucking around in the code, but on the off chance they do, I'd like what they find to not suck. Other nice-to-haves are builds to target Windows Azure and SQL CE. A nice setup UI would be super too. I think the ASP.NET MVC world has gone long enough without a decent forum.The biggest challenge that I've found is making the forum something that can be dropped in any app. While it does rope its views into an area, areas are mostly just routing details. I haven't thought of a clever way yet to limit dependency injection, for example, to just the forum bits. I mean, everyone should be using Ninject, but how realistic is that? ;)How much time and effort should you spend on POP Forums in its current state? Change is inevitable, but at this point I'm reasonably committed to not changing the database schema. I really think it will stay as-is. All bets are off for the various interfaces throughout the app, but the data should generally resist change. It's not even that different from v8, which was one of the original goals because I didn't want to rewrite SQL or introduce a new ORM or whatever. My point is that if you wanted to build a site around this today, even though it's not entirely functional, I think it's low risk in terms of data loss. I can't vouch for whether or not you know what you're doing.I've been having some chats with people lately about quoting posts, and honestly there has to be something better and straight forward. That continues to be a holy grail of mine, and some day, I hope to find it.Enjoy... it's starting to feel more real every day!

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  • Statistics of IMAP vs POP vs Exchange ?

    - by Antares
    Hello, I'm desperately looking for some statistics about usage of POP versus IMAP versus Exchange-MAPI, especially in professional context. I know IMAP is used for accessing mails from mobile devices with limited bandwidth, whereas POP is the good old standard, and Exchange is more business-oriented. Does someone know the approximate percentage of usage of each protocol ? Thanks !

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  • UPS - Two computers - How to get them to both shutdown when battery is low?

    - by hamlin11
    Short Version: How do I get 2 computers to shutdown when a UPS battery gets low? Long Version: I have an APC UPS, the RS 1500. It has a USB cord that goes into my main dev computer. My dev computer will shutdown when the battery gets low. However, in addition, I have now hooked up a database server to the same UPS. How can I have that database server also know that it needs to shut down when the battery gets low?

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  • Can a UPS give off an EM field capable of interfering with desktop components?

    - by Magsol
    I own an APC Back-UPS ES 750; it's about 4 years old, and is the only major component remaining in a question that has been boggling me for the last 18 months. (Yep, I originally posted this question about the possessed desktop, and while I marked a solution and closed the question, a week later the same problem returned) I've tried plugging the desktop straight into the wall (but left the other components plugged into the UPS) and the desktop still froze. Is it possible that the EM field generated by the UPS is interfering with my desktop components and causing these otherwise-unpredictable system freezes? To me this sounds like a long shot, but aside from my twin LCD monitors, that just about takes care of all the major components.

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  • Should I use UPS with my laptop to extend the battery life?

    - by Mehper C. Palavuzlar
    I recently bought a new Vaio laptop which has a 4400 mAh battery. I will use it at home most of the time, and I have an unused uninterruptible power supply (UPS). Should I remove the battery and connect my laptop to UPS? If I do that, how much does it effect the battery's life? I know that batteries stand longer when kept in half-charged in a cool place, but their lifespan decreases in time due to age effect as well. So is it worth to keep the battery out of my laptop, use a UPS instead and mount it when necessary? or should I continue to work with battery mounted?

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  • ASP.net Pop up Alert without page load

    - by Sunny
    Hi, In ASP.NET -- I want to popup an alert window in the case of an event. I don't have a button, i do not load the page at that event. When I searched i got a lot of java script examples but I can't use them as they work either on a button click or on page load. I just want a pop window to come as soon as I capture a particular event. I keep checking for the events every 5 second, as soon as i capture one event, there is a switch case for the actions to follow according to the event captured. For one particular case, i need one pop up "Sorry" along with an OK button. Can someone tell me what to do. Thanks

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  • How can I monitor a Smart-UPS 2200 in PRTG?

    - by dasaybz
    This UPS is connected via a serial cable to a server. I am trying to get the temperature readings off of the sensor that is connected to the UPS and get them in PRTG. We were able to do this in the past and then when we changed the server out, we lost the settings. Does anyone have any info that might help? Thanks!!

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