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• Memory cache Ubuntu 9.10 server x86 doesn't work as expected

  - by Matthijs

  We're using an Ubuntu 9.10 server to transfer Ghost-image files. We configured it only with Samba. And the DOS-clients connect to Samba. The latest updates are installed and so far the servers is running fine. When we image 10 pc's with the same image of 2 files of 2GB there's no disk activity. Everything is loaded in the RAM. There's 4GB in the server. But when we use 2 pc's with 2 different image files of 500 MB (8x) files then there's a lot of continuous disk activity. The speed is lower. So it seems that Ubuntu doesn't cache more then one big file. Are there settings to change this behaviour?

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• Rough estimate for speed advantage of SAN-via-fibre to san-via-iSCSI when using VMware vSphere

  - by Dirk Paessler

  We are in the process of setting up two virtualization servers (DELL R710, Dual Quadcore Xeon CPUs at 2.3 Ghz, 48 GB RAM) for VMware VSphere with storage on a SAN (DELL Powervault MD3000i, 10x 500 GB SAS drives, RAID 5) which will be attached via iSCSI on a Gbit Ethernet Switch (DELL Powerconnect 5424, they call it "iSCSI-optimized"). Can anyone give an estimate how much faster a fiber channel based solution would be (or better "feel")? I don't mean the nominal speed advantage, I mean how much faster will virtual machines effectively work? Are we talking twice the speed, five times, 10 times faster? Does it justify the price? PS: We are not talking about heavily used database servers or exchange servers. Most of the virtualized servers run below 3-5% average CPU load.

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• MS-DOSdivide overflow

  - by repozitor

  when i want to install my dear application on MS-DOS os, i see error "Divide Overflow" what is the meaning of this error and how to fix it? the procedure of installing is: 1-partitioing my HDD disk 2-format C drive 3-installing MS-DOS 4-add the flowing lines to config.sys "DEVICE=C:\DOS\HIMEM.SYS DEVICE=C:\DOS\EMM386.EXE RAM DEVICE=C:\DOS\RAMDRIVE.SYS 6000 512 64 /e" 5-insert my floppy application and then restart 6-when boot process completed, all of the thing appear correctly and i now how to do the next steps note:for installing my application i need to boot from floppy app when i have ms-dos on my hdd disk i do it successfully on the Virtual machine, Q emulator but i can't do it on the real machine, Vectra HP PC, because of divide overflow

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• Can my PowerMac G3 B&W really take a harddrive larger than 128GB?

  - by Josh Calvetti

  So it's a well known fact that the PowerMacs manufactured before 2002 cannot take a harddrive larger than 128GB. I have an old B&W that was running 10.4, and upon putting a 250GB drive inside, it told me that I had inserted a 128GB. That was expected. However, I recently decided to turn that machine into a Debian home file server. I shoved the 250GB drive inside, did some formatting, and now it tells me that it is a 250GB drive. Is this safe to use? Will all my data go corrupt after I've added more than 128GB of stuff? In case the specs are helpful to have, it's a 400MHz B&W, 1GB RAM, Rev. B.

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• Disk Response Time in Windows 7 Resource Monitor?

  - by Keith Nicholas

  In the resource monitor I'am looking at the disk response time. There are a lot of processes where the response time is thousands of milliseconds consistently, I'm pretty sure this is the source of my computer slowing down. I'm not sure what normal response times are though? I'm running win 7 64bit ultimate. This is running on a new computer, i5 with a terabyte drive, 4gigs of ram, etc, disk is still pretty much empty, so it should all be pretty snappy. And if it is going really slow, how do I track down whats causing it? I've turned off things like real time virus protection as experiments to see if there is something weird there, but makes no real difference (other than it doesn't contribute to the problem by accessing the disk)

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• Gateway MX6440 CPU Upgrade

  - by BPugh

  I have received an a Gateway MX6440 laptop as a freebie, but I'm interested in upgrading its AMD Turion 64 ML-32 (socket 754) to something faster (and more cache). I know the range of processors that could work based on the family list in Wikipedia. However, this computer has the stock bios, and any updates I haven't applied from Gateway doesn't specify processor support. I'm looking to go to at least a 2.2 (ML-40). Has anybody upgraded the processor in this model or other in the series success or failure and do you happen to have any guides handy for working with the heat sink? Any Googling I have done keeps hitting RAM marketers. Update Computer died before I had a chance to try this out.

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• Graphics Startup Screen

  - by Wesley

  Specs: AMD Athlon XP 2400+ @ 1987 MHz / 2x 512MB PC3200 DDR RAM / 160GB IDE HDD / 128MB GeForce 6200 AGP / FIC AM37 / Windows XP Pro SP3 So, every time I start up my machine, there's a startup screen for the graphics card. It should display "NVIDIA GeForce 6200 VGA BIOS" with some other copyright information underneath it. However, it randomly changed to say "NV44A VGA BIOS." I think the GeForce 6200 codename is NV44A or something, but is there someway to change it back to say "GeForce 6200 VGA BIOS" or, if not, to completely stop it from showing upon startup? (Graphics drivers are all up to date.) Thanks in advance.

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• Shared SQL Server 2008

  - by nazaf

  Hi, I have a Windows Hyper VPS plan with 1024 MB of RAM. After installing SQL Server 2008 Express, my memory usage went up to 75% without running my site yet. I know that SQL Server consumes a lot of memory, so I decided to host my DB on a shared server. Which of the following is more scalable: install my DB on my VPS, or on a shared server ? If the latter, then can you recommend me a good shared server? Thanks.

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• Is there a path from OpenSCAD to WebGL?

  - by Andrew Domaszek

  tl;dr version, Does a software path exist to convert from openscad input to render on a website via webgl? What I'm trying to do is display OpenSCAD created designs uploaded via post on a LEMPy driven website; this is currently done by outputting to a static png image. I would like to render one of openscad's export formats(wikibooks) and convert for display in javascript/webgl through some software path available via linux batch. CPU and RAM are relatively unconstrained but no GPU available. I've looked into CopperLeicht, but it requires CopperCube output which would require windows or wine. FOSS is preferred but not required. edit: I found three.js has converters for fbx, dae, obj, and 3ds formats which might be helpful as one of the last steps.

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• Can't boot into Ubuntu from CD, or from Acronis True Image recovery disk

  - by ChrisA

  I can boot my computer off a home-burned-from-ISO-image Windows 7 (x64 or x86) installation CD, without problems. It's a Quad 6600, 4GB RAM, 8800GT and most of the time runs Win7 with no problems. However, if I boot off a CD containing Ubuntu (10.04 or 9.something IIRC), or a recovery disk created with Acronis True Image Home 2010, it: boots starts to load the OS from the CD then hangs ... and I have to reset. I've tried all these CDs on another computer, and they boot up into Ubuntu or Acronis respectively with no problems at all. Any ideas what to look for? Sorry this is a little vague but I have no idea where to start, really ... if there's more information needed I'll edit the question. TIA!

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• MacBook Pro screen goes dark

  - by Mike M

  I've had my MacBook Pro for two years now...no problems (it has had 3rd party RAM from the get go). Today, I'm copying a particularly large VM from an External disk drive to local MacBook disk. It has about 3GB to go and I take off to do some other things and when I come back my screen is "dark". The computer is still on but I can't see anything. I forced a reboot by holding down the power button, it starts up with the "chimes", but still no screen. I've done this several times. Any ideas? Do you think the hard disk activity caused it to get too hot?

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• linux log memory hogging issue

  - by helpmhost

  Hi, We have a VPS server (it's using Virtuozzo). On a few occasions now, our VPS memory was fully used up and no new connections could be made to the server on SSH, SMTP, or POP. The only thing that works is connecting to the web service. Luckily, plesk is running on the VPS and we have been able to reboot it through plesk (as well as see that the RAM is 100% used). I would like to find what process is causing this. I have a feeling it's MySQL, but don't really know. Is there some sort of logging I could implement that would help me find out what was the cause of this next time it happens? Thanks.

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• nVidia Control Panel Won't Recognize SLI

  - by Nakaan

  So yesterday I bought a brand new, 1,000W PSU to replace my 650W one and to allow for SLI. I install it and my second card (both are GTX 560 ti cards). I reinstalled my drivers and my system recognizes both cards. The control panel says "GTX 560 ti x2", I can select between them for Physx, sound output, picture output (although I only have one hooked up to my monitor), etc. But the kicker is I can't turn on SLI. Everything I've read says I'll get a balloon notification saying I can use SLI and the control panel will have a new section, etc, but none of those things happens. Anyone have any ideas? System: Win7 Professional x64 2x GTX 560 ti 3.1 GHz Intel Core i5 1,000W Xion PSU 8GB RAM (Can't think of my motherboard right now) Note: My PSU and MOBO both say they're SLI certified and I'm using an SLI bridge. Edit: Formatting changes

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• PXE Boot PCLinuxOS ISO

  - by DBNotCooper

  I'm in the process of trying to convert some computers at my local school to be diskless browser stations. We've identified PCLinuxOS as the OS we'd like to use due to it's easy interface for creating custom ISO images (we need WINE and some custom apps installed also, as well as FireFox). I've been having problems figuring out how to get an ISO to boot via PXE. In our network, I only have access to TFTP and HTTP, so I cannot use NFS. The machines all have enough memory (4 gigs) that they could use a ram drive to hold the ISO image, if that helps. Currently I've been looking at GPXE with GRUB/MEMDISK, but I don't know if that's the right solution, or even where a good resource is for setting it up. Searching the web has proved fruitless, as most of the information is either NFS-specific or out of date. The other students and I would appreciate any help! :)

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• Laptop hardware recommendations for multi-platform development

  - by iama

  I am thinking of buying a laptop with the following configuration - Intel core 2 duo(or I3-330M)/ 4GB RAM/300+ GB 7200 RPM. I would like to be able to run two server VMs on this laptop with Win2K8 and Ubuntu (preferably 64 bit editions). Windows 7 will be the Host OS since that is the one that ships with the laptop. I am thinking of using VMWare player to run the two server OSs. Is this laptop good enough to run the two VMs side by side or do I need to go for a better configuration? Any suggestions? Thanks.

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• Recommended CPU upgrade for Dell Vostro 220 with Intel E7300 processor?

  - by Justin Grant

  I've got a Dell Vostro 220 with an E7300 processor (Intel Core 2 Duo @ 2.66Mhz, LGA775 socket) and I'm thinking about upgrading my processor so I can run Windows Server 2008 R2 with Hyper-V, which requires Hardware Virtualization support in the processor. Yes, I know this is underpowered for a server, I'm actually using it as a desktop machine but I'd like to use Hyper-V instead of Virtual Server (which I'm using now for running VMs). I'd like to keep the same motherboard and ideally the same CPU fan and RAM too. Any suggestions for a good, relatively cheap (under $200) processor upgrade?

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• Is a cluster the most cost effective redundancy method for windows server 2003?

  - by Ryan

  We had a server with bad ram which caused a long outage while they figured it out and our client facing apps had to go down for a while. We are coming up with a solution for instant fail-over but are not sure what the most cost effective method would be. Is a windows server cluster the best method for this? Also note we are using Parallels Virtuozzo if that makes any difference here. We found Parallels has a documented method for setting this up but it said it required a Domain Controller as well as a Fiber connection to shared storage, is all that really needed? Thanks.

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• Optimal Memory Configuration for Dell PowerEdge 1800 (Windows Server 2000 32bit)

  - by David Murdoch

  I am upgrading the memory on a Dell PowerEdge 1800 Server running Windows Server 2000 (32 bit). My Computer Properties currently reports "2,096,432 KB RAM" (4 modules @ 512MB each). Crucial.com scan reports: "Each memory slot can hold DDR2 PC2-5300 with a maximum of 2GB per slot. Maximum Memory Capacity:  12288MB Currently Installed Memory:  2GB Available Memory Slots:  2 Total Memory Slots:  6 Dual Channel Support:   No CPU Manufacturer:  GenuineIntel CPU Family:  Intel(R) Xeon(TM) CPU 2.80GHz Model 4, Stepping 1 CPU Speed:  2793 MHz Installed in pairs of modules." We will be completely replacing the old 512 MB modules. Will there be any performance difference between installing 4 modules @ 1GB vs. 2 modules @ 2GB?

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• Windows 7 has trouble installing software with Visual C++ 2005 & 2008

  - by John Fitzgerald

  I have been reinstalling windows 7 over and over again on an ASUS P5lD2 2Gb Ram 3Ghz P4 because it ultimately looses the contents of "Turn Windows Features On or Off" after I install software like Autocad 2010 & Microsoft Office 2007. I get install errors like 1935 and 1704 on the way tried different fixes at different times (install software in different order to try and isolate problem too). Ultimately I force the software to install after much buggering and end up loosing the contents of "TWFOOO" Should I be installing some older items like .net framework 1.1, 2.0 and visual studio items like vcredist_x86.exe? getting a bit lost because of compounded problems...

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• Simultaneous read/write to RAID array slows server to a crawl

  - by Jeff Leyser

  Fairly beefy NFS/SMB server (32GB RAM, 2 Xeon quad cores) with LSI MegaRAID 8888ELP controlling 12 drives configured into 3 different arrays. 5 2TB drives are grouped into a RAID 6 array. As expected, write performance to the array is slow. However, sustained, simultaneous read/write to the array (wether through NFS or done locally) seems to practically block any other access to anything else on the controller. For example, if I do: cp /home/joe/BigFile /home/joe/BigFileCopy where BigFile is 20G, then even a simple ls /home/jane will take many 10s of seconds to complete. In addition, an ls /backup will also take many tens of seconds, even though /backup is a different array on the same controller. As soon as the cp is done, everything is back to normal. cp /home/joe/BigFile /backup/BigFile does not exhibit this behavior. It's only when doing read/write to the same array.

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• Ubuntu 9.10 x86_32 with PAE causes graphics issues, mainly slowness

  - by widgisoft

  I've tried the 64bit version and found I was constantly hitting a brick wall trying to get 32bit stuff to run; I'd previously used PAE on 9.04 without any issues so figured I'd give it a shot. However, on 9.10 it seems PAE or the process of enabling PAE breaks the nvidia drivers/module somewhat as performance is terrible; I can't even enable desktop effects and there's lots of artifacting on random controls. Disabling the pae image and rebooting fixes the issue however I'm then stuck with "only" 2.7Gb of ram and unable to use the full 8gb that's installed. Is there somthing special I need to do when using pae and nVidia drivers or should I be using 64bit and just figure out how to force run 32bit packages? :-p

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• Windows Disk I/O Analysis

  - by Jonathon

  It appears that we are having a problem with the disk i/o speed on our Windows 2003 Enterprise Edition server (64-bit). As we were initializing a database that created two 1G tablespaces on 3 different machines, it became obvious that the two smaller machines (each 32-bit Windows 2003 Standard Edition with less RAM) killed the larger machine when creating the files. The larger machine took 10x as long to create the tablespaces than did the other machines. Now, I am left wondering how that could be. What programs or scripts would you guys recommend for tracking down the I/O problem? I think the issue may be with the controller card (all boxes are hardware RAID 10, but have different controller cards), but I would like to check the actual disk I/O speed as well, so I have some hard numbers to work with. Any help would be appreciated.

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• Could it be sane to use Windows Server 2012 as desktop

  - by nCdy

  what about using it on desktop? I've got enough strong PC with intel core i7 and 8GB Ram so what should I think about: why not? Were looking about major differences compared to windows 8, found less. for example new file system - can it affect me? In my usual day I need development instruments alike visual studio, virtualization tools, and some games So far I can't find something that must stop me, everything I need can work (seems like) there. Tell me why I must not do it or if that is sane to do.

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• Are these components compatible and are there any significant bottlenecks?

  - by Tom Gullen

  I'm trying to buy a new pc, for software dev and a bit of gaming. I already have a 500gb HDD , and a PCI sound card I want to use as well. Is all this stuff compatible, and will it all work together and are there any significant bottlenecks? Case, Mobo and PSU "Primo Motion" AMD 880G DDR3 Ready Barebones (Socket AM3) http://www.overclockers.co.uk/showproduct.php?prodid=FS-268-OK&groupid=43&catid=1817&subcat= SSD 64GB Crucial RealSSD C300 64GB 2.5" SATA 6Gb/s Solid State Hard Drive http://www.overclockers.co.uk/showproduct.php?prodid=HD-007-CR&groupid=1657&catid=1660&subcat=1668 CPU AMD Phenom II X6 Six Core 1090T Black Edition 3.20GHz (Socket AM3) http://www.overclockers.co.uk/showproduct.php?prodid=CP-266-AM&groupid=701&catid=6&subcat=1944 RAM 8GB Corsair Vengeance 8GB (2x4GB) DDR3 PC3-15000C9 1866MHz Dual Channel Kit http://www.overclockers.co.uk/showproduct.php?prodid=MY-292-CS&groupid=701&catid=8&subcat=1387 Graphics XFX ATI Radeon HD 5770 1024MB GDDR5 PCI-Express Graphics Card http://www.overclockers.co.uk/showproduct.php?prodid=GX-149-XF

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• Laptop hardware recommendations for multi-platform development

  - by iama

  I am thinking of buying a laptop with the following configuration - Intel core 2 duo(or I3-330M)/ 4GB RAM/300+ GB 7200 RPM. I would like to be able to run two server VMs on this laptop with Win2K8 and Ubuntu (preferably 64 bit editions). Windows 7 will be the Host OS since that is the one that ships with the laptop. I am thinking of using VMWare player to run the two server OSs. Is this laptop good enough to run the two VMs side by side or do I need to go for a better configuration? Any suggestions? Thanks.

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