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• Flexible virtualization infrastructure Design with libvirt

  - by Lessfoe

  I'm going to install a CentOS6 Server with Virtualization ( libvirtd ) capabilities on a DELL Server with Hardware RAID5 of around 6T of disk space ( It has 4x2T disks in a PERC700 RAID Controller ). I'm going then to install some guests which requires few resources except one that needs 500GB of disk space, 8/16GB of RAM and good performances. I was thinking about file images for guests storage but I'm not sure about the 500GB VM what needs good performances so that an LVM device could be better. So my question is what would be the best layout concerning: RAID setup ( RAID5, RAID1 + 1 disk for OS only. ) disk partitioning ( using the entire disk/ leave free space for future use and extending it with LVM ) guests storage management ( LVM devices or file images ( considering the 500GB VM that is performance demanding ) or mixed ) Where to put guests storage? /var/lib/libvirt/images or maybe in a custom dir separated from system /home/VMs Thanks in advance for any hint.

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• sound volume increase beyond 100% whenever possible on linux

  - by fakedrake

  Some audio output from files or streams is too low. It is obvious that hardware is able to play the same sounds but louder but because of the data it just plays it at some low level even at 100% volume. Vlc can generally increase the volume of a file up to 200%. Is there a way to do the same thing VLC does system-wide and if possible for an arbitrary v percentage value. If there is no application that does this, where should i look into for libs to do it myself or what code should i modify(eg code in the alsamixer) thank you

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• Sizing a Virtual Server

  - by vdubs

  I would like to replace four aging physical servers with one virtual server. What is the best way to insure the VM server is sized correctly? The requirements of the apps that will be running on the four servers are APPLICATION SERVERS - QTY 3 - These will run the application layer for the web server, Business Objects Business Intelligence app, and various other small client server apps. The three most heavy hitting apps each have the following server requirements. So, if I bought three physical servers, this would be the requirements for each of them Processor - Dual 2.83 GHZ (or faster) Ram - 4 GB Raid 5 - 50-100GB usable space NIC - 1 GB Web Server - this will run one asp.net e-business app that will talk to our dedicated SQL server and the three app servers above. The E-Business software has these requirements for the web server Processor - Quad 2.83 GHZ (or faster) Ram - 8 GB Raid 5 - 50-100GB usable space NIC - 1 GB What is the best tool to determine what I need from a hardware standpoing in a virtual server? I am planning on using VMWare.

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• OpenVZ multiple networks on CTs

  - by picca

  I have Hardware Node (HN) which has 2 physical interfaces (eth0, eth1). I'm playing with OpenVZ and want to let my containers (CTs) have access to both of those interfaces. I'm using basic configuration - venet. CTs are fine to access eth0 (public interface). But I can't get CTs to get access to eth1 (private network). I tried: # on HN vzctl set 101 --ipadd 192.168.1.101 --save vzctl enter 101 ping 192.168.1.2 # no response here ifconfig # on CT returns lo (127.0.0.1), venet0 (127.0.0.1), venet0:0 (95.168.xxx.xxx), venet0:1 (192.168.1.101) I believe that the main problem is that all packets flows through eth0 on HN (figured out using tcpdump). So the problem might be in routes on HN. Or is my logic here all wrong? I just need access to both interfaces (networks) on HN from CTs. Nothing complicated.

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• How much processor speed and cores do I need for these tasks?

  - by ajay

  I am planning to buy a new laptop as I find my current one very slow. My question here is specifically related to RAM size and CPU power. I will mostly be doing development (not much games). I would be dabbling in distributed computing, multithreaded and data intensive parallelizable tasks on multi-cores. For e.g. I would want to be able to Concurrent programming in Scala/Java/Clojure etc. and be able to see parallelization. Furthermore, I would want the RAM to be enough. But from a developer machine standpoint, do you think 4GB RAM and 2.53GHz Dual Core processor would be enough. I'm basically looking at this model: http://store.apple.com/us/configure/MC118LL/A?mco=MTM3NDcyODk (link dead)

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• "broken" windows xp after disc replacement

  - by epeleg

  Windows xp pro OEM was installed on my machine, Disk was failing so I cloned it to a new disk (larger one). Now windows said that the hardware has changed significantly and I need to re-activate, and I would gladly do (got the product number on a sticker on the machine) - only that for running the activation process I need to be logged-in, but when I try to login it just automatically logs me out again :( I know my credentials are O.K. because I can connect to the machine remotely and also use sysinternals tools such as PsExec or PSList etc. on it from a remote machine by specifying user and pasword. Login via safemode does not work any differently then in normal mode... I tried to run rundll32.exe syssetup,SetupOobeBnk (as suggested in several places on the net) using PsExec but it did not seem to help... Is there any way out of this evil circle? [ can't log in because not activated - cant activate because not logged in ]

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• Digital Blue Digital Movie Creator 3.0 driver

  - by user27977

  I'm having a complete 'mare of a time trying to use my schools Digital Blue cameras. We've got the model 3 ones, but can't find the driver disc and using the Windows Hardware Installation Wizard gets me no where! Can you help me to find the driver? When I've used it at my old school it had a piece of software called the Digital Movie Creator, which I've heard you can use to make stop-motion films, which is what I want to do! This is what it looks like http://www.amazon.co.uk/Digital-Movie-Creator-1GB-Card/dp/B000LP30LA/ref=sr_1_2?ie=UTF8&s=software&qid=1265928833&sr=1-2

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• unable to install new versions of linux on my PC

  - by iamrohitbanga

  I have an MSI-RC410 motherboard with onboard ATI Radeon XPress 200 series Graphics card. I have used OpenSuse-11.0 on my PC for over an year. but when I tried to upgrade to OpenSuse-11.1, I managed to install it only to find that several features were missing. for example /dev/cdrom was missing. Also install DVD of Fedora 11 did not work. I have also tried Ubuntu-9.10 live cd. When I boot from the CD i get the initramfs command prompt. Still able to install old versions of these OSs. What is the reason for this behavior? Does it have to do anything with the new version of the linux kernel not being compatible with my hardware? What should i do to install new versions of Linux?

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• Windows XP loses drive letter for existing partition on disk

  - by Kev

  Hi, apologies if this has already been asked - I couldn't spot anything exactly the same. I'm looking for help on the fact that Windows XP has suddenly decided to stop assigning a drive letter to the second partition on my laptop's disk. I haven't added or changed hardware and I keep everything pretty clean in terms of software installed. I've partitioned the disk into a system partition on C: and a user partition on d: but lately, when booting or coming out of hibernation or sometime from stand-by, Windows will lose it's d: mapping. If I notice and remap it from MMC, everything will be perfectly happy and will keep going. Any help on this will be greatly appreciated. Cheers, Kev

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• Links to detailed instructions on building a DIY NAS

  - by Kaushik Gopal

  I'm looking for good links with detailed instructions on how to build a DIY NAS (Network Access Storage). I'm planning on doing it cheap (old PC config + open source software). I did a fair bit of searching and found these links (so please suggest others). Ubuntu Setting up a Home NAS DIY NAS Smackdown How to Configure an $80 File Server in 45 Minutes FreeNAS Build a NAS Device With an Old PC and Free Software Build Your Own NAS Device While these links are great they delve more on the hardware side. I'm looking for more instructions in the software side.

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• Cannot import video from a DV camcorder over FireWire

  - by qbeuek

  I have a JVC GR-D320 miniDV camcorder that has a FireWire interface. I recently upgraded to Windows 7 RTM (64 bit, fresh installation). When I connect my camcorder through FireWire, I can see it in Device Manager without any warnings or problems, but I cannot capture videos from my miniDV tapes. After connecting, AutoPlay displays "Import Video could not find a compatible digital video device. Verify that the digital video device is properly connected and turned on." When using Windows Live Photo Gallery after selecting the import option, my camera is not listed. The camera used to work perfectly on the same hardware before upgrading to Windows 7 RTM 64 bit (it used to work fine on Windows XP SP3 32 bit). Googleing revealed that people had the exact same problems in Vista, but no solution was provided. Any help?

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• Configuring Notepad++ to run knitr2pdf

  - by Stat-R

  Sorry for such a basic question but since I do not have a degree in programming... I am a user of R, knitr and Notepad++. I was trying to configure Notepad++ to run pdflatex and knitr(knit2pdf). By googling I found how to do it for pdflatex but I did not find anything for sweave/knitr. The following are the good ones for pdflatex http://www2.sofi.su.se/~mbe/docs/npp_r_latex.pdf http://www.tlhiv.org/ma497/software/ I inserted cmd /c cd /d "$(CURRENT_DIRECTORY)" && pdflatex.exe -shell-escape "$(FILE_NAME)" into the runrun menu in Notepad++. I do not fully understand the command though. I will appreciate any help on this. Please direct me if you can to any resource for learning these commands. I will be grateful to get any help in configuring Notepad++ for running knitr.

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• Windows SBS 2011 DNS Role (service) failing & needing restarting

  - by HaydnWVN

  Have a Windows SBS 2011 with Exchange that is handling all DNS for the network. Since getting a 3rd party (Hardware & Support) to setup a recieving FTP service and restricting Exchanges memory useage for another 3rd party product (Stock software) the local network seems to periodically 'lose the internet connection'. Delving deeper I found that the DNS service is somehow failing/stopping without the actual service on the server reporting such (nothing in event logs). A simple restart of the 'DNS Role' on the server solves the problem. The manager onsite reports that he has to do this most days in the afternoon - yet not at the same time and other days it works fine without a restart being required. I'm unable (lacking sufficient SBS2011 knowledge) to diagnose this further, ideally I would like the DNS Role to report (and log) the failure, then automatically restart itself.

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• Ultra Low Latency Linux Distribution or Kernel

  - by Zanlor

  I'd like to know if there are any linux distributions that are focused on low latency networking. The area I'm working in is algorithmic trading, and extremely low latency comms between machines is a must. The current h/w we're using is 10g ethernet, we're looking into things like infiniband RDMA and Voltaire VMA I've googled around, and have only been able to find tidbtits of kernel patches, command line options and hardware suggestions. I'm looking for a complete solution, specially built kernel, kernel bypass features, essentially all the goodies rolled up into one package - does such a thing even exist? I ask as a lot of this stuff seems to be a black art, people keep secret what they know works etc.

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• Ultra Low Latency Linux Distribution or Kernel

  - by Zanler

  I'd like to know if there are any linux distributions that are focused on low latency networking. The area I'm working in is algorithmic trading, and extremely low latency comms between machines is a must. The current h/w we're using is 10g ethernet, we're looking into things like infiniband RDMA and Voltaire VMA I've googled around, and have only been able to find tidbtits of kernel patches, command line options and hardware suggestions. I'm looking for a complete solution, specially built kernel, kernel bypass features, essentially all the goodies rolled up into one package - does such a thing even exist? I ask as a lot of this stuff seems to be a black art, people keep secret what they know works etc.

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• How to disable Microsoft eHome MCIR Keyboard and company?

  - by AndrejaKo

  Hi! I'm and unlucky owner of and Acer 7720G laptop which, like many in its category, has receiver for a proprietary infra red remote control device (which I did not receive with my laptop!) . Now my problem is that the receiver is detected as Microsoft eHome MCIR Keyboard, Microsoft eHome MCIR 109 Keyboard and Microsoft eHome Remote Control Keyboard keys. My problem is that this driver has incompatibilities with some programs I use like for example DosBox. When these devices are installed, they cause DosBox to incorrectly detect some keyboard buttons. The workaround is to remove or disable the 3 hardware devices. Unfortunately, I the disable option is grayed out and when I delete them, they are reinstalled on next restart. Is there any way to hack windows in order to prevent their installation? I was thinking about locating the drivers these devices use, but they are buried somewhere in windows installation and I don't have enough experience to find them, so I'm asking you for help.

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• Classic ASP on large memory server

  - by Steve Evans

  I have a client with a large ASP app that apparently is fairly memory intensive. I’m helping them migrate to new hardware they have running Win2k8 R2. They have 4 physical servers with 32gb of RAM each. I’m making the assumption that ASP apps run as a x32 process. So I see that we have two options: On the application pool enable web gardens. Use the physical servers as VM hosts and split the box into say 4 web servers each. Any thoughts on which path will provide us better performance? I’m just not really sure how ASP will handle a machine with lots of memory, and I’m worried it won’t really be able to address the memory well. (you can ignore all the obvious stuff like increased maintenance of 16 web servers vs 4, or the flexibility virtualization gets us over physical servers, etc)

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• How to access an SD card from a virtual machine?

  - by Punit Soni

  I want to format an SD card from my Linux virtual machine. I have a built-in SD card reader in my laptop. I tried using VirtualBox and VMware Player and installed Ubuntu 10.04 guest. None of them are showing the SD card reader as a device. I can access the SD card from the Windows host. I am not interested in solutions using shared folders as I want to access the SD card as hardware (it should show up in /dev). I basically want to set up the SD card for BeagleBoard, but I don't want to install physical Ubuntu in my PC.

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• Resize NTFS System Partition on Perc 6/i RAID

  - by Cipher42

  I've inherited a Dell server that is running out of space on C:. I'd like to quickly and painlessly resize the C drive with partitioning software. However, the RAID card is causing me some troubles. I've resized plenty of desktops in my time, but never a server with hardware RAID. Can anyone recommend software that is GUARANTEED to work with the Dell PERC 6/i? Hopefully someone has resized the system partition with this RAID card before! :) Of course, proper backups are available but I'd be more comfortable with a tried and true solution to save the headache of the restore.... Thanks in advance!

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• How much should I charge for setting up a client web server? [closed]

  - by Vincent

  I have quite the eccentric client who wants to move all his ecommerce websites (about 5-10, all PHP/MySQL) to his own web server that I'm supposed to build. He doesn't want to hear anything about VPS hosting and all the issues and expenses related to owning a server. My responsibility would be to buy all the hardware, install and configure software, etc. How much should I charge for this? I'm planning to start with two relatively moderate Dell PowerEdge C2100 servers, one for web (NGINX), one for db (MySQL).

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• SOHO Netflix and network security

  - by TW

  I want to use WIFI for HiDef video, but I don't trust it for my office PC's. I've heard of VLANs but I have no idea how to set it up or what (SOHO) hardware to buy. Other than getting 2 different DSL lines, how can I be absolutely sure that the PC side doesn't get hacked? What if I want to use MS Home server as a backup device for both sides? Can I make it "read only" for the PC side, and physically change the cable if I need to restore? TW

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• Is there any way to play Netflix (stream) in Windows Media Player 11?

  - by Not So Sharp

  Googling for a solution yields a ridiculous page on eHow that instructs to insert a DVD from Netflix. But I am not interested in the DVD option. I am only interested in streaming and unfortunately none of my browsers (IE, FF, Chrome) uses the hardware acceleration built into my video card. The only way I can play non-choppy video on my PC is via Windows Media Player, but WMP doesn't list Netflix as one of the supported online stores for some reason. Any idea or trick how stream Netflix on WMP 11 instead of a browser?

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• XP boot timer=> set, but does nothing?

  - by mark

  My PC has XP Pro and the boot.ini file looks like this: [boot loader] timeout=30 default=multi(0)disk(0)rdisk(0)partition(2)\windows [operating systems] C:\CMDCONS\BOOTSECT.DAT="Microsoft Windows Recovery Console" /cmdcons multi(0)disk(0)rdisk(0)partition(2)\windows="eXPee Pro" /noexecute=optin /fastdetect Up until about a week ago it would just time-out and boot normally. I haven't made any hardware changes at all. Now, when the system boots it just sits there and waits for me to hit -enter-. I've searched all over for explanations & possible causes, but found nothing which seems to relate. Anyone here have any idea what may have caused the timer to simply quit working like that ? (BTW, the system clock works just as it ever did and keeps time precisely.) Thanks.

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• Windows 7 Activation with Bootcamp and VMWare

  - by Jason Hernandez

  I have windows 7(64) installation setup on a Boot Camp partition on my MacBook Pro 13". I also access this partition through VMware hosted by OS X (snow leopard). Every time I switch between VMware and Boot Camp windows says that it needs to be re-activated because of hardware or driver changes. I've tried wmware KB KB 1003426 to no avail. Edo Thanks, Jason Edit, I am using the most recent VMware and tools. I've tried "KB 1004917" as well. No Dice. I'm considering re-installing at this point.

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• Windows 2008R2 two node failover cluster creation fails

  - by Francois Wolmarans

  We have just installed two Windows 2008R2 Enterprise machines with identical hardware. When running the cluster validation everything is ok. When creating the cluster it fails with the following error: An error occurred while creating the cluster. An error occurred creating cluster 'CLUSTER04'. The parameter is incorrect The logfile on the first node where we are running our config from, does not show any errors. On the second node we get: The Cluster service is shutting down because quorum was lost. This could be due to the loss of network connectivity between some or all nodes in the cluster, or a failover of the witness disk. I've double checked and all communication between the servers are fine. Even when creating a one node cluster it gives the error. There are other failover clusters we have setup without any issues.

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