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• Checking whether product key will work with SBS 2003

  - by Rob Nicholson

  We've recently absorbed a small company who had a Dell PowerEdge server running SBS 2003. For some reason, the hard disks have been wiped. We have the product key though from the sticker on the side of the case but not the installation media: Win SBS Std 2003 1-2 CPU 5-CAL OEM software We do have a Dell labelled set of four CDs labelled SBS 2003 in our store and I've built a VM from this media but it doesn't prompt for the product key during install. Is there any way to ascertain whether this media will work with this product key without going through activation? I know one can activate several times but would prefer to check we've got the right media before doing this. Thanks, Rob.

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• Process of carrying out a BER Test

  - by data

  I am subscribed to an ISP supplying a 3meg ADSL line. Lately (for the last 4 weeks) speeds have dropped from the usual average downstream speed of ~250kbps to just 0.14Mbps (according to speedtest.net) and employees are complaining about lack of access to the server. I have been calling customer support and logging calls for the last 3 weeks, but they have been unable to determine the source of the problem other than carrying out a few bitstream tests and checking the DHCP renewal times. I am going to call back and suggest carrying out a BER test. What type of equipment is needed to carry out this test? I have access to a wide range of Cisco networking equipment. Other: We don't need a leased line as there are less than ten employees.

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• What are the specifications on the RAM inside my computer?

  - by Faken

  I have a Dell Dimension 9200 that I bought 4 years ago. I want to find out the exact specifications (manufacturer, speed, timings, etc.). Is there a way to get this specific info without having to open up the PC (it's buried in and under a bunch of furniture, I'd perfer not to have to dig it out). All I know about it right now is that it is 4 1GB sticks of DDR2 RAM at 667 Mhz. It is the standard RAM that shipped with the computer 4 years ago (from Dell). Does anyone know what the specifications are of the RAM that Dell used in this particular model of computer 4 years ago? Note: I've done my research before coming here. CPU-Z, EVEREST, and AIDA32 all have been unable to give me any more information other than 4 x 1GB @ 667Mhz. I can't find any specifications in the Dell online manuals either (at least not as specific as I want). Thanks -Faken

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• Virtual Machine files on ramdisk doesn't run faster than on physical disk

  - by Landy

  I installed total 36G memory (4x8G + 2x2G) in the host (Windows 7) and I used ImDisk to create a 32G ramdisk and format it to NTFS file system. Then I copied the virtual machine (in VMware Workstation format) folder, including vmx, vmdk, etc... to the new created ram disk. Then I tried to power on it in VMware Workstation. What made me surprised is that the performance is not better than before. It cost almost the same time to power on the Windows 7 VM. I check the Resource Monitor in the Windows 7 host, and the statistics of CPU, disk, network are rather normal. The memory has reported 3000+ hard fault/sec when guest OS boot then drop to 0 after the guest powered on. Any idea about this issue? I had thought the performance of ramdisk will be better than physical disk in this case. Am I wrong? Thanks.

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• UEFI - Linux Mint Boot from USB Doesn't work

  - by Joe Bennett

  I'm running Linux Mint (only OS other than in VirtualBox) and wanting to remove it. I've created a Live USB of Windows 8 using Windows 7 USB/DVD Download Tool - Yes, I know it says Windows 7 but I've been doing research and I am hearing from everywhere that it also works for Windows 8. The ISO was loaded on just fine (AFAIK) Computer came with Windows 8 pre-installed I have Safe boot and Fast boot disabled in the BIOS Settings I have USB as my first boot option I have tried both the USB 2.0 and 3.0 ports Yet, Mint is all that will boot up. Anybody have a similar issue? If it helps, the computer is a Toshiba Satellite S855D Laptop with an AMD APU quad-core processor (3 CPU, 1 GPU)

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• Varnish: User specific pages

  - by jchong0707

  I'm new to Varnish and am interested in using it to speed up my web application I wanted to know if Varnish can handle caching and serving user specific content. For example if I have a page say for example /welcome which is dynamically generated in the backend and is user specific So if User John Smith shows up to /welcome it'll show in the page itself 'Welcome John Smith' and if Bob Smith shows up to /welcome it'll show 'Welcome Bob Smith' Ideally both of those /welcome pages will be cached for each unique User, is this something Varnish can do? (is this even a good Use Case of Varnish?) Thanks!

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• Recommendations for stable, reliable flash drives

  - by Josh Kelley

  We're looking to purchase some flash drives for use in some embedded devices. Most of our requirements aren't too different the generic "good, fast" flash drive: reliability is very important, speed is good, and so that the drive will fit, the case shouldn't be too large (so no OCZ Throttles). Consistency is also a major priority; we'd like to be able to buy more or less the same product a year or two from now without having to worry about the manufacturer swapping drive components with less reliable or slower parts. (We've been burned already by our previous manufacturer doing this.) Any recommendations, especially regarding consistency? I can read Ars Technica to get an overview of current models, but what are consistently good models?

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• Multiple SSIDs better or worse

  - by swiss196

  I'm just setting up a network in a student house with 10 rooms, 3 floors. Configuration at the moment is as follows: Virgin Media 100mb Cable Virgin SuperHub on ground floor broadcasting on SSID1 Second AP(Edimax) wired on middle floor broadcasting on SSID2 These two networks server all 3 floors fairly well but I was wondering whether it would be better to setup an individual SSID for each floor (both the routers allow me to configure up to 3 ssids on each!). Would this help with speed issues, i.e if someone on the top floor is downloading/streaming etc, this wouldn't affect someone on the middle floor on a different SSID Or, will it have no effect? Thanks, Dave

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• stdout and key press

  - by Jack

  Hi, when in console, if I press a key, some interrupt controller sends code of that key to CPU, which looks into some table and than represent that keypress by printing some charracter to stdout. But, is keyboard sending an ASCII code of that key, or just some standardised code? Since there is so many languages and extra characters, OS must further translate its code into some character according to user selected scheme, I guess. I ask, becouse I am from Czech Republic, and we use some characters that do not exists in standart ASCII code. So I was thinking, if I enter this character into a console, and then print it, lets say in C++ using cin and cout, and I have set locale to Czech, stdin must actually send some non-ASCII code of the character I pressed to input stream. Am I right?

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• how to limit upload bandwidth per user in linux?

  - by Gihan Lasita

  Can anyone provide the tc command to limit upload bandwidth per user in Debian Lenny? I found that to mark packets per user with iptables I can use the following command iptables -t mangle -A OUTPUT -p tcp -m owner --uid-owner testuser -j MARK --set-mark 500 but I have no idea how to use tc update by running following commands, i managed to limit testuser upload bandwidth to 10Mbit iptables -t mangle -N HTB_OUT iptables -t mangle -I POSTROUTING -j HTB_OUT iptables -t mangle -A HTB_OUT -j MARK --set-mark 30 iptables -t mangle -A HTB_OUT -m owner --uid-owner testuser -j MARK --set-mark 10 tc qdisc replace dev eth0 root handle 1: htb default 30 tc class replace dev eth0 parent 1: classid 1:1 htb rate 10Mbit burst 5k tc class replace dev eth0 parent 1:1 classid 1:10 htb rate 10Mbit ceil 10Mbit tc qdisc replace dev eth0 parent 1:10 handle 10: sfq perturb 10 tc filter add dev eth0 parent 1:0 prio 0 protocol ip handle 10 fw flowid 1:10 now the problem is, i do not want to limit testuser's FTP bandwidth but by running above commands FTP speed also limited to 10Mbit. Regards

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• Home Server restore fails cannot find boot device

  - by Tim Heuer

  I am using Windows Home Server to backup my PCs. I recently had a hard drive failure on one of my WHS connected PCs and obtained an identical sized/speed drive for my laptop. I used the latest home server restore CD and did the restore. It said it completed successfully. Upon reboot, it says 'cannot find boot device' and lists all my drives (hard drive, cd, network book) indicating no valid operating system was found. I boot using the Win7 repair disk and while it doesn't see the operating system, it sees the drive and if I go into a command prompt, I can see all my data on the drive. My laptop is Windows 7 64-bit Ultimate. I've tried most everything I can think of. I'm a technical user (software developer) so I'm pretty aware of how things work (or should). I don't feel like I'm missing a simple step here.

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• My KDE very slow in certain operations

  - by Pietro

  I have a problem with my Linux installation. It seems that the KDE code that deals with directory windows is extremely slow (on both Dolphin and Konqueror). This happens both when I click on a directory icon and when I want to open/save a file from many KDE applications. The time the window takes to open can be one minute or more. The same happens when I right click on an icon. Looking at the CPU usage, this is very low (less than 10%). Am I the only one with this problem, or is it well known and maybe already fixed? Consider that I cannot update to a more recent version of OpenSuse. Thank you, Pietro Configuration: Linux version: OpenSuse 11.4 KDE 4.6.0 System: DELL Precision T3500 - Intel Xeon Home directory mounted on a remote drive. <-- could this be the reason?

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• How many VPS' can I create on my server?

  - by user197692

  I need to create as many VPS's on my dedicated server (KVM or OpenVZ) in order to sell them but I really don't know the answer. RAM calculation is simple, it's more about CPU resources, how many VPS's can hold. I'am talking about Intel i7-2600 (4 cores, 8 Threads). I need to deploy as many VPS's. It's all about the nr threads? i.e. 8 threads = maximum 8 x 1vCPU or maximum 4 x 2vCPU? I'am planning to use 1Gb and 2Gb memory on each VPS, the server has 16Gb (but I can raise RAM if need it. So, can I create 8 KVM VPS's with 4 vCPU and 2Gb ram each ? How about 20 VPS's with 1Gb ram and 4vCPU each? How is this decision affected by the hypervisor (KVM, OpenVZ, VMware)?

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• XenServer/Center: Shared SRs for hosts not in same pool?

  - by 3molo

  I would like to use the same SRs on XenServer hosts that are not able to be part of the same pool (because of not having the exact same cpu feature set, if I understand it correctly) in order to share templates, being able to (manually) start a host on another node, backing up running hosts on other hardware etc etc. The technology for SR can be any of iSCSI, NFS or CIFS, iSCSI would obviously be preferred. Trying to add an iSCSI volume renders a "This LUN is already in use as SR iSCSI - Shared Storage on pool xxxxxx.". Adding a NFS share on one XS host, creating a template there and then checking another XS host reveals they don't agree on used space etc. Coming from a vSphere world this is quite baffling, but if these are limitations then I will have to rethink some of the concepts for this low budget project.

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• Dell Studio XPS 16 Runs Hot

  - by dtbarne

  Specs: 1920x1080 i7 1.6 GHz quad core 6GB RAM 1GB ATI Radeon HD 6570M/5700 Series 500GB 7200rpm Hard Drive Love this laptop for many reasons, but it constantly runs hot (CPU is low 70s with basic tasks and often 80+ is not uncommon) and I'm finding it too much to deal with. The laptop feels very hot (almost too hot for a lap) and often gets so hot that the OS slows down or freezes altogether. I've tried cleaning it out and even replacing the thermal paste. I often use an external cooler, but it only helps 3-5 degrees and it's a pain to have to use. I've come to the conclusion that it just runs hot. I have two questions: What is to blame? The i7 processor, the gfx card, or is it just that this laptop has poor cooling? Does the Dell XPS 15 run cooler? I'm looking at replacing my current laptop, but I don't want to run into the same problem.

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• What can cause peaks in pagetables in /proc/meminfo ?

  - by Fuzzy76

  I have a gameserver running Debian Lenny on a VPS host. Even when experiencing a fairly low load, the players start experiencing major lag (ping times rise from 50 ms to 150-500 ms) in bursts of 3 - 10 seconds. I have installed Munin server monitoring, but when looking at the graphs it looks like the server has plenty of CPU, RAM and bandwidth available. The only weird thing I noticed is some peaks in the memory graph attributed to "page_tables" which maps to PageTables in /proc/meminfo but I can't find any good information on what this might mean. Any ideas what might be causing this? If you need any more graps, just let me know. The interrupts/second count is at roughly 400-600 during this period (nearly all from eth0). The drop in committed was caused by me trying to lower the allocated memory for the server from 512MB to 256MB, but that didn't seem to help.

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• Problem with blue-sceens

  - by Oystein

  Hi I have a problem with my computer. I get bluescreens a lot. I get different bluescreen-codes everytime, and this happens randomly. This can happen when I boot my computer, when I'm surfing on the internett, when I'm away from the computer and are logged out... I tried to disconnect everything that was connected to my computer, beside the monitor. That didn't help. I have reinstalled Windows, changed memory, changed video card, but nothing of this helped, I still get bluescreens. I guess the problem here is the mothercard, CPU or HDD. But I want your opinion before I order anything new to my computer. Can you tell me what the problem is?

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• Webserver: Performance impact when storing session files on /dev/shm

  - by GetFree

  I have a website runing on a typical setup: Linux, Apache, PHP, MySQL. However, what's not typical about it, is that it's getting tons of traffic (400,000+ visits a day) and so, efficiency is becoming more and more important to me. I'm constantly looking for things I could optimize and, right now, my attention is focused on PHP's session files. There's a hell lot of session files constantly being read and created on the /tmp directory. So my question is: Is it a good idea to store the session files in /dev/shm (tmpfs) in order to speed things up a little bit??

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• Is it better to always purchase as much as higher in Watts SMPS, for PC?

  - by metal gear solid

  Is it better to always purchase as much as higher in Watts SMPS, for PC? Does higer watts SMPS also consume more power (electricity bill)? How to know how much watts of SMPS we should purchase? What are factor who decide how much watt of power will need? I'm going to purchase a new Motherboard + CPU + HDD + RAM + DVD Wrtiter + SATA 500 GB HDD ? I'm not purchasing any external Graphic Card. How to decide which watt of SMPS ,I should purchase?

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• mplayer dumpstream sometimes fails

  - by User1

  I'm trying to rip the video at http://videolectures.net/ecml07%5Fgetoor%5Fisr/, so I can play it at a faster speed. I paste http://193.2.4.216/2007/pascal/ecml07%5Fwarsaw/getoor%5Flise/ecml07%5Fgetoor%5Fisr%5F01.wmv into a firefox browser in Windows and MediaPlayer plays the thing. However if I try mplayer -dumpstream, it gets stuck into an infinite loop trying to play the file. If I use wget to download the link, I get a small text file which basically points to the same URL. How can I get mplayer to download this stream?

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• Is it safe to run an operating system from an USB flash drive?

  - by Georg

  I've got a laptop that has a broken harddisk controller. Replacing the motherboard is quite expensive. I thought about buying a flash drive and installing & running the system from it. However, I'm concerned about some things. Speed: Are they fast enough for swap memory (I've got only 1GB RAM installed.) I'm considering buying 2 or 3 of them and making them into a RAID. What about limited write cycles? How long will it last for a system that has a filesystem with journaling enabled? I'd hate to abandon it. Are there significant differences between internal SSD which are used in modern laptops like MacBooks and USB flash drives? What should I expect in 10 years when the memory wear starts kicking in?

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• trouble with internet connection - slow to open web pages if they open at all until I put VPN on and then they open ok

  - by Caroline Coleman

  I am having problems with my internet connection. At the moment I am on a mac and connected through a netgear wireless router. The internet connection either won't open a webpage at all or if it does it takes ages. However if I turn my VPN on the pages open at a normal speed. Also skype functions OK and I seem to be able to download files ok. I have tried connecting with a wire between the router and the computer and it makes no difference.

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• Tools to monitor guest OS performance in vSphere

  - by Quick Joe Smith

  I am looking for some tool or way to retrieve performance data from guest VMs running under vSphere 4.1. I am currently interested in the 4 basic metrics: CPU(%), Memory(%), Disk availability(%) & Network utilisation(Kb/s). The issue I have is that all of vSphere's performance data is from a ESXi host perspective (active, shared, consumed, overhead, swapped etc.) which is far removed from the data from the VM's own perspective. For instance, I have a Windows server VM idling, using around 410MB (~25% of its allocated 2GB) as reported by Task Manager, and this is the value I'm after. vSphere's metrics seem unable to arrive at this figure by any reliable and repeatable means. Is anyone aware of tools that can obtain this kind of data? The simpler, the better.

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• vps like [load] graphs

  - by foober

  I investigated a couple of tools but they were really annoying and not polished. kSar for exampe is supposed to graph sar output, but it doesn't work. There's a perl script around (sar2rrd) that's supposed to convert sar output in rrd format and generate graphs. Doesn't work. (at least it doesn't like the output of "atsar" as per debian/ubuntu package). Tried munin but it wants to mess with http servers, and for some reason it didn't really work, too. It displayed errors in the webpage generated by the http server it put on port 4949. So, is there a simple install and forget tool to generate daily load,cpu,memory,network graphs? It seems strange to me that this problem has not been solved, maybe I'm looking in the wrong places

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• Is a ext3 Linux filesystem byte order independent

  - by Lothar

  I have a good old HP-C3700 Workstation with PA-RISC CPU here that I would like to use as a subversion server for a very large repository. I just worry what happens if the workstation dies (everybody who knows this computer knows that it is running like an Abrams tank and unlikely to happen in the next decade). I'm using Debian Linux on this system. If the mainboard dies can I just plug the SCSI drive into a PC and read the files from a normal Intel Linux PC? Which software RAID levels would be safe?

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