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• Problem booting virtual machine after converting VMDK to VHD

  - by vg1890

  I used the VMWare VCenter Converter Standalone Client to convert a physical drive on my old PC to a virtual drive. The conversion worked fine and I ended up with a valid VMDK file. Next, I wanted to convert the VMDK to a VHD for use with Microsoft Virtual PC, since that's what I use on my new box. I used WinImage for the conversion and that worked fine, too. I can access the files from the virtual drive through WinImage. However, when I create a new virtual machine using Virtual PC and add the existing VHD file, the machine doesn't boot. The initial boot screen flashes with the amount of RAM and then the screen goes black. If I turn off the VM and reboot in safe mode I can see the drivers being loaded until eventually it gets to crcdisk.sys and hangs indefinitely. Any ideas how to fix this? I'm not opposed to starting over from scratch if there's another method to turn my physical machine into a Virtual PC VM. Thanks! EDIT - I should add that the virtual drive is a system boot drive and not a secondary drive. EDIT - I tried booting from the install CD and doing a repair. The result was that the system could not be repaired due to a "driver error."

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• Windows Audio Issue

  - by Nikki

  This one is driving me nuts. Hoping someone can shed some light. I'm running windows 7 using onboard audio. It's been fine for over 2 years but lately there's a problem every time I play audio. I hear a small soft burst of static and the volume turns itself down from 50% to 23%. Once at 23%, it plays fine. No related events logged in viewer. No reported problems with the device. Different headphones, same problem. I played around with audio settings for hours but the problem persists. EDIT: ok more info: Motherboard: ECS G31T-M LGA775 System info displays this: Name High Definition Audio Device Manufacturer Microsoft Status OK PNP Device ID HDAUDIO\FUNC_01&VEN_1106&DEV_E721&SUBSYS_10192683&REV_1001\4&3D4E739&0&0001 Driver c:\windows\system32\drivers\hdaudio.sys (6.1.7600.16385, 297.00 KB (304,128 bytes), 14/07/2009 9:51 AM) I'll keep adding info as I find it. The question I want resolved is; Is it faulty hardware? If so, I can buy a sound card. I can't imagine software is responsible since I haven't installed anything new for weeks. Virus scans are clear as well. The static burst is irritating to say the least. Tried 2 different headphones and separate speakers. Same problem. I know it's not an easy problem but I was hoping someone had encountered the same thing.

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• Intel Core i7 QuadCore on HP Pavilion dv7 Overheating Issues

  - by kellax

  I bought a brand new HP notebook: HP Pavilion dv7-6b21em BeatsAudio edition. The notebook is about 2 months old and has pretty nasty overheating problem. I mainly use it for development however i do play some games. The disturbing thing is that the computer is loud on pretty simple tasks. Here are the specs: CPU: Intel Core i7-2670QM QuadCore ( 8 threads ) @ 2.20 GHz RAM: ( 8GB ) 2x 4GB @ 1066 HDD: 1TB 7200 GPU: ATI Radeon HD 6770M 1GB Dedicated DDR OS: Windows 7 64bit Enterprise I have an external monitor runing on VGA port an 22' Samsung SyncMaster S24B300 CPU Heat Statistics Platform: rPGA 988B (Socket G2) Frequency: cca. 3000 Mhz VID: 1.1809 - 1.2059 v Revision: D2 CPUID: 0x206A7 TDP: 45.0 Wats, Lithographu: 32 nm Heat: Tj. Max: 100*C, Power 4.5 - 5.9 Wats Core #0: 63*C Load on all is about 0 to 2% Core #1: 65*C Core #2: 66*C Core #3: 67*C I opened the notebook the fan is working fine there is no dust but still right now the fan is pretty loud even tho all i have open is FireFox. When i run a game the heat jumps to whopping 90-97*C. It has not shut down due to overheating yet but the loud fan is pretty annoying considering I'm not really doing anything stressfull. Is there anything i can do to fix this is it maybe a BIOS issue ? I have all drivers updated tho to the latest. I have very few background processes running consuming bare 2GB of RAM and about 2% of CPU. I had it serviced they said there is nothing wrong with it. But i feel that a Notebook that costs 1.2k Euros cant be like this.

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• Win7 Pro x64 task manager hangs when restarting explorer.exe after waking from sleep

  - by Brandon Dybala

  I have a desktop running Windows 7 x64 Pro, set for Hybrid Sleep on a wired network. Wakeup is only enabled from the keyboard (wake on mouse and Wake-On-LAN are both disabled). Sometimes when it wakes up, there is no network connectivity. The notification area icons for both network and volume don't respond to clicks. If I open the Network and Sharing Center, clicking the red X doesn't do anything. Restarting does fix the problem, but I'm looking for a solution that does not require restarting (if at all possible). Drivers are all up to date. I've tried opening Task Manager and restarting the explorer.exe process, but Task Manager freezes for a few minutes, the "New Task" dialog closes, and explorer.exe has not restarted. CPU and memory usage are both normal. One thread suggested making sure the BIOS was set for S3 sleep mode only (not S1 or S1 & S3), but I haven't checked this yet. Going back to sleep and waking back up does not help. So far only a reboot has fixed the issue. System specs: Windows 7 x64 Pro Asus P8Z68-V PRO/GEN3 128 GB Crucial m4 SSD (Firmware version 0309) Intel Core i7 2600 3.4 GHz 16 GB RAM Any ideas? Brandon

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• Why can't I reconnect to my Philips SHB9000 bluetooth headset?

  - by Thomas Eyde

  This is so annoying. When I connected my Philips SHB9000 bluetooth to my Windows 7 (64 bit) for the very first time, it worked well. I had to manually change the default playback device, but otherwise it worked. Then, when I start up my computer from standby, it's nearly random when I can reconnect or not. My last option is to remove the bluetooth device and reconnect it. But now, even that doesn't work. The sad thing is, this used to work better on Windows 7 beta. Windows Update has a new driver which fails to install. Searching for this driver yields nothing. I thought all vendors had an official site for their drivers? Well, Philips seems to have none. If there is no answer to this problem, my advice is to NOT buy this headset. It's good looking, the sound is nice, but what need do we have from that if we can't use the bloody device?

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• Debian and Multipath IO problem

  - by tearman

  Basically the situation is, I have a box running Debian, the box internally has an Intel SCSI RAID controller which is controlling 2 hard drives in RAID1 mode which is where the OS is installed. Further, I have a QLogic fiber channel adapter that connects the unit to a Fiber Channel SAN. My process of installation is I'll install Debian to the local drives, and leave the QLogic firmware out of it for the time being. Then once I get the unit online, I'll install the firmware drivers. This flops my internal drives from /dev/sda to /dev/sdc, which is a bit annoying, but recoverable. Probably should address these by UUID anyways. Once I get back online, I have to install multipath-tools (the framework is a multipath framework). However, once I reboot the machine again, it fails on boot after discovering multipath targets, saying my local drives are busy and cannot be mounted to /root. Any help in what may be the problem here? Or at least how to disable multipath until after the unit boots and then ignores the internal drives?

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• ZFS + FreeBSD + virtualbox

  - by John

  Hi, I'm configuring a FreeBSD server hosting virtualbox serving half dozen mission critical busy mail servers. I just learned ZFS, I'm quite attracted, but have a few questions: what is the CPU overhead of ZFS? I googled and found little (or no) benchmark for that. from what I learned, when ZFS updates files, it keeps the old file as snapshot, and write the updated part for the new version. However that would mean for each snapshot it keeps that require significant storage overhead. How much is this storage overhead? For example, suppose I have 2TB usable space, how much space can actually be used for the latest version of files one year later? is FreeBSD with ZFS hosting virtualbox serving half dozen busy guest mission critical mail servers a reasonable combination? Anything particular to be careful with? And can I still choose ZFS for the guest OSs? This is because I may build another identical such box for redundancy, and will need to do some mirroring between each pair of the guest systems across the boxes. I'm trying to configure a Dell R710 for this. From what I learned, I shouldn't choose any RAID at all, is that true? In that case, are the drives still arrive hot swappable? this may sounds a bit pathetic, but since I have no experience with ZFS at all, and this is a mission critical server, so just ask just in case: I'm choosing twin Intel L5630 processors, and 6 x 600GB 15K RPM Serial-Attach SCSI drives. If I need more space in the future, I would just hot swap some drivers with larger capacity to expand the storage. There is no problem with these, right?

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• Mapping printers using Group Policy Preferences; works on Windows XP, not on Windows 7 x64

  - by Graeme Donaldson

  I'm trying to use Group Policy Preferences to manage user connections to shared printers. The print server is Windows Server 2003 R2 Std edition. Several printers are installed, and I've added x64 editions of all the drivers to the print server as well. I've created a new GPO containing the printer preference settings. Printer mappings are targeted based on AD security group membership. I log on to a Windows XP PC with the Group Policy CSEs installed and the printer maps perfectly. I log on to a Windows 7 x64 PC and it doesn't map. If I manually connect to the shared printer, I get a prompt which asks me to confirm if I trust the server before installing the driver, and then it works perfectly. I have domain admin rights and my UAC settings have not been changed from the default, i.e. UAC is enabled and the default level is selected. Is the printer mapping failing because it's unable to prompt me to install the driver, or is there something else afoot?

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• Windows XP SP3 Keyboard stops working

  - by Kevin K

  Here's the strangest thing I have yet to see in 20+ yrs of computer repairs. My in-laws Windowsx XP SP3 has stopped recognizing keyboards. The keyboards work fine in the BIOS, during the boot select process to boot normally, etc. but once Windows comes up it will not recognize any USB keyboard. The USB mouse works fine, have tried different USB ports, different keyboards, etc. nothing works. I can log into the machine via VNC and use the remote keyboard just fine, but not connected locally. Tried a system restore, it says nothing changed. I am about to just re-install Windows at this point, except I am afraid it will happen again. I have googled for this and it is not unheard of, but I have not found any solution other than nuking it. Anyone have any ideas? I have re-installed the USB drivers for the M/B. Gone into devices and deleted them for a re-install, etc. Keyboard works off a Linux live boot CD, and in the BIOS setup so it is not a hardware issue, and I have tried a few keyboards all of which I know are good and work fine on other systems.

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• Problem recreating BCD on Windows 7 64bit - The requested system device cannot be found

  - by Domchi

  NVIDIA drivers upgrade crashed my Windows 7 installation, so I'm working to undo the damage. What I can do: I can boot Windows install from the USB drive, and I can boot the Hiren's Boot CD. Although automated Windows repair fails, I can get to command prompt when I boot Windows install from USB drive, and I can see my drive and all my data. What I cannot do: I cannot boot into Windows - I get this message: Windows failed to start. A recent hardwware or software change might be the cause. To fix the problem: 1.insert windos cd and run a repair your computer option. File: /boot/bcd Status: 0xc000000f Info: an error occured while attempting to read the boot configuration data. It seems that something is wrong with my /Boot/BCD, so I'm trying to recreate it from scratch. I've tried all the methods detailed here (including Windows repair which fails), and I'm left with the last one (near the bottom of that page). When I type the following command as in the tutorial: bcdedit.exe /import c:\boot\bcd.temp ...it fails with the following error: The store import operation has failed. The requested system device cannot be found. Many Google results say that I must use diskpart to set my partition active, however it's already set as active. Also, when I try this: bcdedit /enum It fails with similar message: The boot configuration data store could not be opened. The requested system device cannot be found. Does anyone know what does that error message mean, and what is the requested system device? I'd like to avoid having to reinstall Windows since all the files on disk seem to be fine.

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• mod_rewrite: redirect from subdomain to main domain

  - by Bald

  I have two domains - domain.com and forum.domain.com that points to the same directory. I'd like redirect all request from forum.domain.com to domain.com (for example: forum.domain.com/foo to domain.com/forum/foo) without changing address in addres bar (hidden redirect). I wrote something like this and put it into .htaccess file: Options +FollowSymlinks RewriteEngine on RewriteCond %{HTTP_HOST} ^forum\.example\.net$ RewriteRule (.*) http://example.com/forum/$1 [L] RewriteCond %{REQUEST_FILENAME} !-s [NC] RewriteCond %{REQUEST_FILENAME} !-d [NC] RewriteRule ^(.+) index.php/$1 [L] That works only if I add Redirect directive: RewriteRule (.*) http://example.com/forum/$1 [R,L] But it changes previous address in address bar. EDIT: Ok, let's make it simple. I added those two lines at the end of the c:\windows\system32\drivers\etc\hosts on my local computer: 127.0.0.3 foo.net 127.0.0.3 forum.foo.net Now, I created two virtual hosts: <VirtualHost foo.net:80> ServerAdmin [email protected] ServerName foo.net DocumentRoot "C:/usr/src/foo" </VirtualHost> <VirtualHost forum.foo.net:80> ServerAdmin [email protected] ServerName forum.foo.net DocumentRoot "C:/usr/src/foo" </VirtualHost> ..and directory called "foo", where i put two files: .htaccess and index.php. Index.php: <?php echo $_SERVER['PATH_INFO']; ?> .htaccess: Options +FollowSymlinks RewriteEngine on RewriteBase / RewriteCond %{HTTP_HOST} ^forum\.foo\.net$ RewriteCond %{REQUEST_URI} !^/forum/ RewriteCond %{REQUEST_FILENAME} !-s [NC] RewriteCond %{REQUEST_FILENAME} !-d [NC] RewriteRule ^(.+)$ /index.php/forum/$1 [L] RewriteCond %{HTTP_HOST} !^forum\.foo\.net$ RewriteCond %{REQUEST_FILENAME} !-s [NC] RewriteCond %{REQUEST_FILENAME} !-d [NC] RewriteRule ^(.+) index.php/$1 [L] When I type address http://forum.foo.net/test in address bar, it displays /forum/test which is good. http://foo.net/a/b/c shows /a/b/c which is good. But! http://forum.foo.net/ displays empty value (should display /forum).

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• Cursor lag when mouse cursor changes?

  - by Mathias Lykkegaard Lorenzen

  Cursor lag issue Introduction I'm experiencing a newly arrived problem lately that frustrates me a lot. The computer I bought is a Clevo 150ERM. Two of my friends bought the same machine, and are experiencing the same issue. The computer came with Windows 7. There, I had no issues. Then, when we all switched to Windows 8, they had the mouse problem and I didn't. That is until after 4 or 5 months when I decided to install the RTM driver of my Intel graphics chip, and the latest Nvidia driver. I also installed the latest version of Skype that just released (Skype 6 and Skype for Metro). This basically leads me to conclude that the issue is not hardware-prone, and is not based on the operating system itself, rather the drivers or components that follow with it. Description of the issue The issue itself (lag with the mouse) happens whenever the cursor icon changes. For instance, if I keep hovering from and to a textfield (and the cursor changes into a caret and then back to a mouse), it stops for 200 milliseconds while it changes the icon. An example is if I follow the mouse in the pattern shown by the arrows below. When crossing the window border, the cursor changes into a "resize window" cursor for a short while, making the cursor lag. This doesn't sound like much, but it happens every time the cursor changes (even if it's to just move the mouse somewhere else, and accidentally make it cross a window border from where the resize cursor shows etc). What do you suggest I try?

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• Advice on migrating from a Samba PDC

  - by pgb

  When we started our software development company, we decided to use Samba as a PDC for the few Windows workstations we had. We use Samba with OpenLDAP, and it has been a good replacement for AD for almost 6 years now (using Windows XP workstations). Now I'm facing a few problems with our setup: The Linux server where the PDC runs is very outdated (and is a Gentoo install, don't ask why!) We started using Windows 7 on some of the workstations, and these can't join the Samba domain (there's a workaround, I know) Our company has grown a bit, and we have now about 20 workstations (and plan to have more in the near future). I have to reinstall our PDC, and was thinking on updating to another Linux distro and the latest Samba 3.4. However, I started having second thoughts, and now I think going to a Windows Server for the PDC is the way to go. The main drivers to opt for a Windows Server would be its easy administration and the ability to use Windows 7 out of the box, without any registry hacks. My question(s) then is(are): How should I do this migration? Can I keep the same domain name? What will happen to the users? Will they be recreated and won't be identified by the workstations as being the same user, even if the actual username is the same? What steps would you recommend me to migrate from Samba to Windows Server? Bonus question: If you think staying in Samba is the way to go with my current setup, I'm also interested on your thoughts.

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• Network connection to Firebird 2.1 became slow after upgrading to Ubuntu 10.04

  - by lyle

  We've got a setup that we're using for different clients : a program connecting to a Firebird server on a local network. So far we mostly used 32bit processors running Ubuntu LTS (recently upgraded to 10.04). Now we introduced servers running on 64bit processors, running Ubuntu 10.04 64bit. Suddenly some queries run slower than they used to. In short: running the query locally works fine on both 64bit and 32bit servers, but when running the same queries over the network the 64bit server is suddenly much slower. We did a few checks with both local and remote connections to both 64bit and 32bit servers, using identical databases and identical queries, running in Flamerobin. Running the query locally takes a negligible amount of time: 0.008s on the 64bit server, 0.014s on the 32bit servers. So the servers themselves are running fine. Running the queries over the network, the 64bit server suddenly needs up to 0.160s to respond, while the 32bit server responds in 0.055s. So the older servers are twice as fast over the network, in spite of the newer servers being twice as fast if run locally. Apart from that the setup is identical. All servers are running the same installation of Ubuntu 10.04, same version of Firebird and so on, the only difference is that some are 64 and some 32bit. Any idea?? I tried to google it, but I couldn't find any complains that Firebird 64bit is slower than Firebird 32bit, except that the Firebird 2.1 change log mentions that there's a new network API which is twice as fast, as soon as the drivers are updated to use it. So I could imagine that the 64bit driver is still using the old API, but that's a bit of a stretch, I guess. Thanx in advance for any replies! :)

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• How to get the permissions right for /dev/raw1394

  - by Mark0978

  I recently upgraded one of my ubuntu machines to Karmic and I'm having trouble getting the permissions of /dev/raw1394 set to 0666. They only thing this machine is used for is recording audio from a firepod which uses /dev/raw1394 via jackd and there are no other FireWire devices connected, so security around this device is not really an issue. If I run as root, everything works as expected, but I have some folks that run the recorder that I don't want to have root access. However, I can't figure out which lines setup the perms I've tied this: /etc/udev/permissions.d/raw1394.rules:raw1394:root:root:0666 And I have this setup (default install) /lib/udev/rules.d/75-persistent-net-generator.rules:SUBSYSTEMS=="ieee1394", ENV{COMMENT}="Firewire device $attr{host_id})" /lib/udev/rules.d/75-cd-aliases-generator.rules:# the "path" of usb/ieee1394 devices changes frequently, use "id" /lib/udev/rules.d/75-cd-aliases-generator.rules:ACTION=="add", SUBSYSTEM=="block", SUBSYSTEMS=="usb|ieee1394", ENV{ID_CDROM}=="?*", ENV{GENERATED}!="?*", \ /lib/udev/rules.d/60-persistent-storage-tape.rules:KERNEL=="st*[0-9]|nst*[0-9]", ATTRS{ieee1394_id}=="?*", ENV{ID_SERIAL}="$attr{ieee1394_id}", ENV{ID_BUS}="ieee1394" /lib/udev/rules.d/50-udev-default.rules:# FireWire (deprecated dv1394 and video1394 drivers) /lib/udev/rules.d/50-udev-default.rules:KERNEL=="dv1394-[0-9]*", NAME="dv1394/%n", GROUP="video" /lib/udev/rules.d/50-udev-default.rules:KERNEL=="video1394-[0-9]*", NAME="video1394/%n", GROUP="video" /lib/udev/rules.d/60-persistent-storage.rules:KERNEL=="sd*[!0-9]|sr*", ATTRS{ieee1394_id}=="?*", SYMLINK+="disk/by-id/ieee1394-$attr{ieee1394_id}" /lib/udev/rules.d/60-persistent-storage.rules:KERNEL=="sd*[0-9]", ATTRS{ieee1394_id}=="?*", SYMLINK+="disk/by-id/ieee1394-$attr{ieee1394_id}-part%n" And I find these lines in /var/log/syslog Apr 30 09:11:30 record kernel: [ 3.284010] ieee1394: Node added: ID:BUS[0-00:1023] GUID[000a9200c7062266] Apr 30 09:11:30 record kernel: [ 3.284195] ieee1394: Host added: ID:BUS[0-01:1023] GUID[00d0035600a97b9f] Apr 30 09:11:30 record kernel: [ 18.372791] ieee1394: raw1394: /dev/raw1394 device initialized What I can't figure out, is which line actually creates that raw1394 device in the first place. How do you get /dev/raw1394 to have permissions 0666?

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• CD and DVD burning very slow with LG DVD Burner

  - by Om Nom Nom

  I have an HP m7560in Desktop which came with an LG DVD burner. As far back as I can remember, it has been having problems in burning discs. It used to take about one and a half hour to burn 4 GB of data on a blank DVD-R. I am using Nero and ImgBurn and I usually select 8x speed for burning. I used to run XP earlier and now I run Windows 7 on it, but I face the problem on both. I have already checked that DMA mode is selected in the IDE controllers' properties. On XP, uninstalling the IDE controllers and DVD drive from the Device Manager, rebooting and letting it install the drivers again fixed the problem for a while, but after a couple reboots, the problem used to come back. On Windows 7, even doing that is not fixing the problem. In fact, in Windows 7, the burning process doesn't even begin. Imgburn gets stuck on the first stage (of writing Lead-In), and it never progresses until I turn off / reset the computer. I checked the disc info after this happened, and the disc still shows empty and ready to be burned on, so it's obvious that it didn't even touch the disc. I have already had the drive replaced once by HP, but it didn't fix the problem. Do you guys have any suggestions? (Note that Windows Updates doesn't give any newer driver for the controllers, or any other components for that matter).

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• Virutal Machine loses network connectivity on Hyper V Cluster

  - by Chris W

  We're running a number of VMs on a 6 node failover cluster of blades using Hyper V. We have an intermittent issue (every few days at different times - not a fixed frequency) of VMs losing network connectivity. Console access to the VM suggests all is fine and the underlying blade has normal connectivity. To resolve the problem we either have to re-start the VM or, more usually, we do a live migration to another blade which fires up connectivity and we then migrate it back to the original blade. I've had 3 instances of this happen with a specific VM running on a particular blade however it has happened once with a different VM running on a different blade. All VMs and blades have the same basic setup and are running Windows 2008 R2. Any ideas where I should be looking to diagnose the possible causes of this problem as the event logs provide no help? Edit: I've checked that each blade is running the latest NIC drivers and all seem to be fine. Something that is confusing me - a failover or restart of the VM resolves the issue. Whilst I need to work out the underlying issue that is causing the NICs to hang I'm also concerned that the VM didn't failover to another node which would have solved the outage for me. Is there a way to configure the cluster so that it can tell that the VM guest has lost connectivity and fail it over? As things stand the cluster is assuming that the VM is running happily as I presume Hyper V says everything is great even though there is a problem.

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• Broken UAC, cant edit File/folders or change settings in user account

  - by Antoros

  It appears that UAC is broken cant move/delete some file/folders, when asked to use administrative right (and say yes) it shows the loading bar and then nothings gets moved/deleted, no error whatsoever opened control panel, user account and when i click on any option with the Shield (administrative rights) the mouse changes to loading and thengo back to normal, not opening any menu or showing any error Already done a sfc /scannow , no errors found Already used Microsoft's Fix it, reclycle bin broken and repaired, still the same error Used microsoftaccounts tool , this are the errors i got: Problem with microsoft account policy... <- this is the problem (didint fix) Trust this PC <- loop of redirections, cant get to trust this pc (only one with w8) Problems witht sytem registration : i think it is because of the soft system reset Some setting have sync turned off : i never configured anything to sync Rootcauses found and created logs : would like to know where the logs are saved... had to use a ".reg" file to change uac setting to never notify, thinking it would fix this, no, it stoped asking though, i can still open a cmd with Administrative rights, but cant access to UAC settings Accesed Administrator account (net user administrator /active:yes)and even with that account could change any settings so there it is, dont know what else to do in the moment (this pc broke with 8.1 update and was restored to factory configuration, it broke several drivers and kept most of the registry entries, i cant find the cause of this problem. other info: i tried to delete a file in a program folder and couldnt, downloaded unlocker to check first if it was permissions but no, it showed me a msg telling me that there wasnt any error, and if i would like to delete it, clicked on yes, and it did delete it, what amuses me is that i cant without this tool, not even using the feature that takes over ownership Edit: wow, in a not crappy pc chkdsk is fast, completed with no errors found : /

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• What are the advantages and disadvantages of the various virtual machine image formats?

  - by Matt

  Xen and Virtualbox etc both support a range of different virtual machine image formats. These are: vmdk, vdi, qcow & qcow2, hdd & vhd. Without any bias toward a particular product, I'm wanting to know what are the advantages and disadvantages of the various formats both from a features perspective, robustness and speed? One piece of info I discovered in a forum post was this: "The major difference is that VDI uses relatively large blocks (1MB) when growing an image, and thus has less overhead for block pointers etc. but isn't ultimately space efficient in the sense that if a single byte is non-zero in such a 1MB block the entire space is used. VMDK in contrast uses 64K blocks, and thus has more management overhead and generally a bit less disk space consumption What offsets this is that VDI is more efficient when it comes to snapshots." You might be thinking, I want to know this because I want to know which format to choose? Not exactly, I'm developing some software which utilises these formats and want to support one or more of them. Simplicity, large disks and ease of development are my main drivers.

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• Why does my computer crash randomly?

  - by Donavon Decker

  The other day I went out to my van to get my Tower and when I opened the trunk it fell out. I brought it into the house and opened it, and everything looked ok. When I started it up, about 1-3 minutes afterwards it would crash. It did this over and over until I reseated the cooler. Everything seemed normal again, until after about 10 minutes of gameplay (any game), it would crash. I reseated my GPU + reinstalled the drivers, however I still get the same error. A while back, I'd check my 'Windows Rating' periodically, and all of them were in the '6.0-6.9' range except for my hard disk usage (always been like that [not relative]). Today I went in and looked, and my Processor and Memory was rated 5.4. I reseated my cpu and my memory, refreshed the windows rating, and then my processor and memory went from 5.4, to 5.1. A few minutes ago I reseated them once again, and now it's back to 5.4. Note: Not sure if this is relevant to the issue, but I updated my bios earlier today I honestly have no idea what the issue is, but I'm getting aggravated at the problem. Here are some images which contain images of my specifications: i1271.photobucket.com/albums/jj623/donxdeck/1_zps09f0607c.jpg i1271.photobucket.com/albums/jj623/donxdeck/4_zps381cd00a.jpg i1271.photobucket.com/albums/jj623/donxdeck/3_zps54bba720.jpg i1271.photobucket.com/albums/jj623/donxdeck/2_zps945d3d72.jpg Thanks for the help

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• Improving Performance of RDP Over LAN

  - by Jared Brown

  Architecture: A deployment of 6 new HP thin clients (Windows XP Embedded) with TCP/IP access to several new HP servers (Windows 2003 Server). Each thin client is connected over fiber optic to a Gigabit Cisco switch, which the servers are connected to. There are 10/100 Ethernet to fiber converter boxes on each end of the fiber cables. Problem: Noticeable lag over RDP while using the Unigraphics CAD package. 3D models take .5 to 1 second to respond to mouse actions. Other Details: Network throughput on each thin client's RDP session is 7288 kbps. RDP connection settings - color setting: 15k, all themes, etc. turned off. Local and remote system performance stats are well within norms (CPU, Memory, and Network). Question: Are there newer versions of terminal services or RDP I can use on my existing OSes? Are there compression algorithms, etc. that are well suited for a high-bandwidth LAN? Are there valid alternatives that will yield higher performance (i.e. UltraVNC with drivers installed)? Are there TCP/IP tuning options I can exploit?

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• Windows Server 2003 R2 SP2 GPO Conditional Terminal Services Client Redirection

  - by caleban

  We have a lot of mobile/home users with different client side printers attached. Most of these users don't need to print on the client side and we don't want all of these users Terminal Services sessions trying to map their client side printers and we don't want all of these drivers on the Terminal Server. What is the best way to set up around 90 users to have no client side printer redirection and 10 users to have client side printer redirection (to the printers attached to their home computers)? Do I need to create two separate OU's in AD one for redirection and one for no redirection and create two different policies one for each OU? One GPO with Client Server data redirection Do not allow client printer redirection disabled and one enabled? Is it preferrable instead to change each user's AD User Properties Enviroment Client devices Connect client printers at logon setting? Is there any for me to direct "ALL HP Printers" to a single HP Universal Printer Driver, "ALL Canon Printers" to a single Canon Universal Printer Driver, etc without specifying hundreds of unique printer names in the printsub.inf file? Thanks in advance.

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• Monitor connected with WiDi just shows a black screen

  - by Pops

  I have a Dell XPS 18 and want to use an external monitor with it. The monitor has VGA and DVI-D inputs. The XPS 18 has no video output ports, but it does support Intel WiDi. I have a Netgear P2TV2000 WiDi receiver, but it only has composite and HDMI outputs. I'm connecting the receiver to the monitor with an HDMI cable and an HDMI/DVI-D adapter. So, in short, the video path is: Computer → WiDi → WiDi receiver → HDMI cable → HDMI/DVI-D adapter → Monitor After setting all this up, I can't get anything to display on the monitor. At the moment I power the monitor on, I can see my desktop for a brief fraction of a second, and then everything goes black. All of the relevant drivers have been updated to the latest versions. When I use a different WiDi-enabled computer to connect to the same monitor, everything works fine. When I use the original computer and receiver to connect to a TV, everything works fine. It's only when I connect the original computer to the monitor I want to use that the connection fails. What could be going wrong here, and how can I get the video to work consistently?

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• How to use my computer as a Headset device for my phone with Bluetooth?

  - by TheJelly

  I want to extract the audio from my phone (the analog TV and FM/AM receiver mainly) and play it through my computer speakers. There is a headphone jack but it is of non-standard size (probably a micro-jack) and I do not have access to a shop that sells that kind of equipment in my area so doing this with Bluetooth is the only solution I can foresee. Both my laptop and my phone support A2DP but for some reason the service (from the phone) does not show up while I add a new connection and the phone does not let me initiate a connection with any other profile except FTP (although it detects other services in the service list like A2DP and works perfectly fine with other profiles like DUN, HID, OPP, SSP if the connection is started through the computer). I am currently using the latest version of the Toshiba stack, I have tried using WIDCOMM but it refuses to install drivers for both the internal Bluetooth (which is a Broadcom device) and the USB Bluetooth that I use on my desktop. The standard Microsoft stack (generic driver) does install but it does not work with both of my devices as they do not detect any Bluetooth devices when scanning. With BlueSoleil (the default stack that came with the USB Bluetooth) I could set my device as "headset" instead of only "laptop/desktop", and this allowed both my phones to detect my laptop as a device they can use as a headset, but the problem with this stack was that only the older phone could actually connect to my laptop and that the internal Bluetooth could not be used. Basically, I want to set the device type as a "headset" for my phone using the Toshiba stack like I did with BlueSoleil. Is there any way this could be done? Thanks. Image: Device type selection http://i.stack.imgur.com/drjC6.jpg

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• Macbook Pro 2010 Ethernet Jumbo Frame(9k MTU) Support?

  - by Troggy

  Has anyone been able to use jumbo frame support on their 2010 Macbook Pros? This is kind of negative news here, but I am seeing many reports that this is not available anymore due to Apple's choice of network card in the new machines. I cannot set my MTU speed over 1500 on my new 2010 MBP i7, but my old early 2008 MBP (Core2) has the 9000 MTU setting for use. Everything I have is setup to use jumbo frames and I thought apple kept that feature in their "pro" lineup. It sounds like the Mac Pro still has it. Did they decide to use a chipset that doesn't support it? I am trying to pinpoint some solid chipset numbers and the feature support. Maybe they just need to update the drivers? Is there some more official information about this feature? This might seem minor, but this is really frustrating if apple removed this feature from their pro laptop line. From what I have read so far, it sounds like I am not alone in my frustrations with this. http://discussions.info.apple.com/message.jspa?messageID=12258067 http://discussions.apple.com/thread.jspa?messageID=12130158 Anyone have any experience or further knowledge about this issue ... beyond typing my question into google and giving the top 5 results as answers? :)

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