I would like to monitor my server power usage over time, but I'm in 220V area (Europe), and everything I can find on the net is for 110V, like this one here:
http://tinyurl.com/110vpm
I know the answer is probably a resounding YES, but I just wanted to double check. I just purchased a new chassis for my PC and now my 4pin cpu power plug doesn't reach. I'm wondering if the 4 pins are required for operation, or can I get by for the weekend without it until I can go get an extension?
Just had a power failure and am just going through my 4 usbdisks to remount them and found that 1 (the most important one) is coming back as 'doesn't contain a valid partition table'.
What can I do to try to repair the disk and hopefully retrieve the partition? Lukily I do nightly backups. but would like to get what was there today if possible.
Hello All:
The ISP I work for purchased a Sun NPR900R Server Cabinet. For usual operation, a UPS will provide the power supply. Is it possible to operate this at 120 V input range?
I've edited a pps file which was made with the 2003 version and saved also as compatible with Power Point 97-2003 but a friend a mine can't see the last version of the file. The original file can be seen by my computer friend.
What can I do to make the new version of the pps file to be viewable on the computer of my friend? Any tips? Where/what else do I have to check/do ?
(in the office) Today, the UPS battery replace warning light lit up and there was a slight panic as the all the technical people will not be around the next few days.
But after thinking a bit further, I realise that in case of power failure, no client computers will be able to turn on in the first place and operations will be disrupted regardless of whether the UPS keeps the server up.
This makes me wonder if the UPS is really such a critical component? What do you think?
So I read a lot of good things about Asterisk. I am not however looking to run a call center or small business setup. I am still interested what potential uses it has for me as a "power user" and what features I could harness for my communication needs.
I'll throw out that I currently use other technologies like Google Voice, Skype, and a cellphone of course. So, what potential uses, if any, could Asterisk PBX have for a user like me?
My power point file has animation on one slide that when printed will be a "mess". Is there a way to print the slides in which each step of the animations are printed into 1 slide?
So I read a lot of good things about Asterisk. I am not however looking to run a call center or small business setup. I am still interested what potential uses it has for me as a "power user" and what features I could harness for my communication needs.
I'll throw out that I currently use other technologies like Google Voice, Skype, and a cellphone of course. So, what potential uses, if any, could Asterisk PBX have for a user like me?
My HP d330 does not properly shutdown, after Vista "shutting down" message the lcd screen goes black, but both HD + Power Leds remain on.. Any ideas?
No entries in EventViewer about this.
Keyboard leds no more work after this partial shutdown so I assume hardware is partially shutdown..?
Same problem occurs when I choose Sleep from shutdown menu
I recently bought an Arima SW350 motherboard.
It supports 16 ddr simms as well as 2 opteron 2xx CPUs, so I imagine it may have pretty heavy power requirements...
It has a 24 pin ATX power connector, 2 4 pin "P4" power connectors, and an 8 pin EPS power connector.
My supermicro power supply has a 24 pin ATX connector and the EPS connector, and one P4 connector.
Can I safely run this thing with only one P4 connector plugged in? Can I safely get a "hard disk to P4" adapter and use that to power the other P4 connector on the motherboard? Do I just need a new power supply?
The board's documentation is pretty thin on the topic.
Possible Duplicate:
Setting up a LAN connection in Windows
How can I connect two computers, both running Windows XP, to each other using a single LAN cable?
I have the option of hooking up my machines to the internet either wirelessly or via ethernet cable (wired). I'm curious as to which is faster; the approximate wireless signal strength (average) is about 60%. My question is, would my internet be faster if I used ethernet, resulting in a stronger connection?
hi
(1)
i saw in one of your posts that it is possible to get different outputs in windows 7. i am eager to know more. Is there any way i can create a 2 or more virtual cable between two softwares simultaneously. so that simultaneously, two or more audio inputs will be routed to equal no of audio analysers receivers, and then the audio analysers send back a filtered audio back to respective audio inputs...
Please reply to email id: [email protected]
I have a D-Link home router and my isp is Time warner. When I try to login to any site it does not let me. The website does not keep me logged in when I navigate the pages. I have to keep loging in for every web page I see. When I connect my cable modem directly to my computer I am able to stay logged in. Any ideas here?
As an exercise I implemented the mathematical power function. Once using recur:
(defn power [a n]
(let [multiply (fn [x factor i]
(if (zero? i)
x
(recur (* x factor) factor (dec i))))]
(multiply a a (dec n))))
And once with lazy-seq:
(defn power [a n]
(letfn [(multiply [a factor]
(lazy-seq
(cons a (multiply (* a factor) factor))))]
(nth (multiply a a) (dec n))))
Which implementation do you think is superior? I truly have no idea.. (I'd use recur because it's easier to understand.)
I read that lazy-seq is fast because is uses internal caching. But I don't see any opportunities for caching in my sample. Am I overlooking something?
The village where I live was sat under a thunder cloud for most of Friday, and we suffered a few power fluctuations (specifically, what seemed to be split-second outages). When I got back home from work, I found that my PCs had shut down during one of these outages. When I went to boot one of them back up, I couldn't get anything to display on screen, nor did the boot seem to complete correctly. I tried a number of things - unplugging different bits of hardware, swapping graphics adaptors, etc. - to no avail. I thought I was looking at a fried motherboard or CPU. Power seemed to be distributed correctly to the peripherals (the drives all appeared to be working) so I figured it couldn't be the PSU. Eventually I unplugged it from the mains and left it overnight (approx 12hrs unplugged). I tried it again this morning, and it booted up correctly. Woo-hoo!
I have all my equipment protected by surge-protected power strips, so I don't think a spike caused these problems. Obviously it has something to do with the power fluctuations, and maybe the PSU in the problem machine got itself confused somehow.
The questions are, for future reference and to help people with similar problems:
What are the likely causes of the boot failure I experienced?
Is a UPS a simple and cost-effective solution, or might other things help prevent this happening in future?
What UPS can you recommend (my budget is limited)?
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.
I have an HP Pavilion Elite desktop computer, model HPE-490t. I like it because it didn’t cost too much, boots itself from an SSD, came with 16 GB of RAM, and has 6 CPU cores for editing video and camera RAW images. It has one behavioral quirk that I cannot explain, however. The recent power interruptions here in the Northeast got the machine into a state where it could not be restarted. It would power up for a second or two, shut down, and then power up again, never being able to get to the point of showing anything on the monitor.
I unplugged it for about 10 seconds and plugged it back in. Same behavior (fails to boot).
I unplugged it and walked away for an hour, then plugged it back in and it worked perfectly!
I think something similar happened after installing a second hard disk drive into this machine.
So the question is why does the computer behave differently depending on how long it has been unplugged? Where is energy stored that affects the machine’s ability to boot? Capacitors in the power supply? Battery on the motherboard (there is one for the clock, but that wouldn’t be exhausted by being unplugged for an hour, I don’t think)?
I have not been able to determine a pattern for why this happens, despite my best efforts. I've attempted to run it on full power with Prime95 and this doesn't trigger a restart. Generally the restarts occur while I'm playing games, watching videos, or even just having multiple tabs open in a browser. However, I often play processor intense games for hours without any restarts occurring, and sometimes they'll happen 3-4 times in an hour during less intense activity, so I don't think that is the problem.
I imagine it has something to do with overheating or power consumption so I've been monitoring CPU temperature and cleaning with compressed air, but the problem keeps happening. I don't know how to track power consumption, and assume that this is the problem. Whenever this occurs, the sound gets stuck in a short loop of whatever was playing at the time, though restarts also occur when nothing is playing.
Here is a screenshot of temperatures:
and under load:
Here's the parts list: http://secure.newegg.com/WishList/PublicWishDetail.aspx?WishListNumber=10546754
As shown in the list, the case includes a 585W Power Supply, which I've been told should be plenty.
I built the computer myself with a friend's guidance but it's very possible I did something wrong. Right now I'm looking into ensuring that I have the latest drivers for all components. Any help would be appreciated- thanks.
This question already has an answer here:
Tips to extend battery life for laptops and notebooks
24 answers
How do I improve the battery life of my Inspiron 14z under Ubuntu 12.04?
This laptop gets 4-5 hours of battery life using Windows (e.g. here). I've removed Windows, installed Ubuntu 12.04 and the initial battery life was only 2 hours. With some tweaks (described below) it's still only ~2.5 hours.
For reference, the laptop is the latest model of the 14z:
i5-3337U processor
32GB MSATA, 500GB HDD (5400rpm)
AMD Radeon HD7570M graphics card
I have put ext4 partitions on both the SSD and the HDD, and have mounted / to the SSD and /home to the HDD. I also put a 24gb linux swap partition at the start of the HDD, though I figure this won't be used all that much (the laptop has 8gb of RAM).
After googling around and reading Ask Ubuntu and other sites extensively, I have done the following steps, and they have improved the battery life ~30 minutes (exact improvement not clear, but battery life is still nowhere near 4-5 hours).
Installed Jupiter (and set Performance to "Power Saving")
Installed laptop-mode-tools
cat /proc/sys/vm/laptop_mode now outputs 5 (previously it output 0)
But it's not clear that this will help: AskUbuntu question
Turned down the brightness of my screen from full to 1/3
Other things I have heard about but have not tried for fear of frying the laptop or my linux install:
Add "pcie_aspm=force" at the end of the line with "quiet splash" in /boot/grub/grub.cfg
Enable ALPM, but it may already be enabled in 12.04?
Enable i915 framebuffer compression
Use a propietary driver for the graphics card? Turn off the graphics card? (what would happen if I relied on the internal Intel bridge?)
Use TLP?
Spin down the HDD more aggressively (howto, but I think laptop-mode-tools does this already)
The only other thing I've noticed is that plastic just above the F5, F6 and F7 keys gets really hot. According to Jupiter my CPU temperature is only 69 celsius and the System Monitor shows CPU load at 7% so I don't think it's the CPU. Maybe it's the graphics card?
Also, I've set up MongoDB and LAMP on the machine as well. When I run powertop MongoDB is high in the list, but I'm not sure if that's relevant to battery life because I'm not actually doing anything with MongoDB most of the time.
Edit - Additional info as requested
$ lspci -nnk | grep -iEA3 "(graphics|vga)"
00:02.0 VGA compatible controller [0300]: Intel Corporation Ivy Bridge Graphics Controller [8086:0166] (rev 09)
Subsystem: Dell Device [1028:057f]
Kernel driver in use: i915
Kernel modules: i915
--
02:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Thames [Radeon 7500M/7600M Series] [1002:6841]
Subsystem: Dell Device [1028:057f]
Kernel driver in use: radeon
Kernel modules: radeon
These are the problems I am encountering.
XP can access Windows 7, not the other way around (which is fine, because I don't need it the other way currently)
File transfer is too slow like 0.031 MB/s even though netperf and netCPS list around 8-9 MB/s.
I disabled firewall on both computers. Both are same workgroup. I left homegroup on Windows 7. Windows 7 sees the connection as unidentified network.
10.1.1.2 (XP) and 10.1.1.1 (Windows 7)
Subnet mask 255.255.255.0
Default gateway and DNS are empty for both of them.
Both computer are connected to internet using wireless (using home network), and both of them are connected to each other using wire!
If anybody has any pointers, do let me know. I have no problem doing such setup with both computers being Windows 7. This time one of them is XP though, and that seems to be the problem.
The question says it all. All i want is that my W-Lan connection should be disabled whenever a wired connection is available.
What would be the easiest way to do that in Ubuntu/Gnome?
In all guides (for instance some about guessnet) i found i had to configure my whole network configuration (WPA keys, DHCP, ...), but i find that a bit too complicated for such a simple use case. I just want to disable wlan0 when eth0 is connected.
I just tried updating the iPhone's firmware, and things went haywire.
iTunes informed the update had failed and linked me to this page.
The iPhone is stuck on the image from the top of that page.
I held down the sleep and home buttons until it turned off and turned it back on, and then went through the iPhone's 'restore' mode.
It then error'd again and I'm stuck back with the logos on the iPhone.
Does anyone know how to fix this?
Thanks