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• How can I restore VM on a new Hyper-V server?

  - by jaloplo

  I was working gladly with my VM on my local Hyper-V server. But, after installing some updates on the host the system only show the famous blue screen. I couldn't start my host so I reinstalled it and configured as new Hyper-V server. My VM was in a another disk to prevent this happening but I don't know how to add it as a new VM on new server. In addition, this VM has various snapshots so, how can I add this VM to my new Hyper-V server? UPDATE: I can't do Export/Import because my server crashed before I can't do it.

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• Enable hardware virtualization in BIOS?

  - by rhon

  I am running a FOXCONN AM2+ M61PMV with an AMD Athlon II X2 240 Windows 7 ultimate 64 bit. From startup I have hit the del key and the options for enabling the hardware virtualization are not there. I have checked the Microsoft tool that says I can run virtual and i have checked SecurAble, that says yes. But I have an open case w/microsoft (they've been trying for a week [7 tech support people later]) and they're saying that I need to ensure that the hardware is enabled. Where do I go to see? Is there another way besides from the startup?

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• Internet not working on a VirtualBox Linux machine

  - by mtahmed

  I installed VirtualBox on a Windows 7 PC and installed Xubuntu (Ubuntu with XFCE) on it. Now on the Windows, I am connected to the internet through a LAN which automatically authenticates to connect to the network(because its my work computer). I have also installed the guest additions on this virtual machine (Xubuntu). I tried both NAT and bridging to set up internet connection but I still cannot connect to the internet. For NAT: The browser doesn't say website not found but it keeps trying to load it forever and the network status monitor (the one provided by VirtualBox) doesn't show any green light (no incoming packets). For Bridging: Same as for NAT but the network status monitor shows incoming packets and outgoing packets. But internet still doesn't work. I tried a lot of different things but none worked.

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• mod_cache serving the wrong content

  - by J. Pablo Fernández

  I'm trying to use mod_disk_cache to speed up a web site that is running on WordPress. Whenever I enable it with CacheEnable disk / and the rest being the stock Ubuntu configuration I start to get the wrong results. When I see the main page it's fine, but when I go to a specific post I get a RSS feed instead. Like if the cache is returning the wrong content. I've disabled my RewriteRules as it seems mod_cache doesn't work with that. I'm not even sure where to start to debug such a thing. Any ideas?

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• Image file can't be opened by windows store app if the file is in the Ext4's external hard disk

  - by ? ?

  My question is described below: I have two disks, external hard disk and removable disk. They are formatted with EXT4. I put the same image in the disks, and use Ext2Fsd to mount the disks. I open the file in win8, and it will default open by the windows store app : photos. It will be success to open if the file is in the Ext4's removable disk. It will be failed to open if the file is in the Ext4's external hard disk. I don't know why it will be failed to open if the file is in the Ext4's external hard disk. Does anyone have similar experiences?

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• Create Google Maps screenshots at regular intervals

  - by Dave Jarvis

  Background People are concerned that building a pipeline to the West Coast of Canada will increase the number of oil tankers, thus increasing the probability of a major oil spill, thereby creating an environmental catastrophe. The AIS Live Ships Map website captures real-time Marine Traffic updates using a Google Maps interface. While it is possible to obtain data from an AIS data feed, often the feeds are either pay-for-use, or otherwise encumbered with license restrictions. Problem The AIS Live Ships website presents a map in the browser: The map above has had its location interactively changed to focus on the area in question: the northern straight of Vancouver Island. Question How would you create a service that captures the map every 30 minutes and that could run, with neither user-intervention nor a significant memory footprint, for a few years? Idea #1 Create a virtual machine. Install and run a light-weight browser. Use Shutter to take captures at regular intervals. Idea #2 Use Python's Ghost Webkit to automate the captures. Thank you!

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• NIS client cannot find NIS server (Opensuse)

  - by Tony

  I installed NIS server on head node of a virtual cluster(VirtualBox). One of the node (let's say node-1) can find NIS server and work with it, but another node (node-2) just can't find the NIS server in Yast while it can ping and ssh to both head node and node-1. BTW, all the nodes are VMs, head node and node-1 are on the same physical machine, node-2 is on another physical machine. I set the domain name in /etc/hosts and /etc/yp.conf, and ypwhich sometimes gives the correct domainname several minutes later complains about "ypwhich: Can't communicate with ypbind", and will back to work after some time. Also tried rpcinfo -p hostname and it worked as expected. I almost tried every thing I can find on internet, but seems that not many people had this problem. Any help would be very appreciated.

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• How to connect XP mode VM to the host so as to simulate LAN Activities?

  - by rsjethani

  First of all my PC config: Host:Windows 7(32-bit) Guest: Windows XP SP3 as XP Mode. Integration Features Disabled(I don't think it has any thing to do with networking). Network Connections on Host : 1.Local Area Connection(Realtek...) - unplugged(as no other PC is connected). 2.Nokia 2730 classic USB Modem - I use this connect to the internet. Now,How can I connect the guest to the host as if they were on a LAN. Please give specific steps as I am using Windows XP Mode/Virtual machine for the first time.

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• Compiling the Linux kernel, how much size is needed?

  - by ant2009

  I have downloaded the newest most stable Linux kernel, 2.6.33.2. I thought I would test this using VirtualBox. So I create a dynamically sized harddisk of 4 GB. And installed CentOS 5.3 with just the minimum packages. I setup the make menuconfig with just the default settings. After that I ran make and got the following error: net/bluetooth/hci_sysfs.o: final close failed: No space left on device make[2]: *** [net/bluetooth/hci_sysfs.o] Error 1 make[1]: *** [net/bluetooth] Error 2 make: *** [net] Error 2 The amount of space I have left is: # df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 3.3G 3.3G 0 100% / /dev/hda1 99M 12M 82M 13% /boot tmpfs 125M 0 125M 0% /dev/shm My virtual size is 4 GB, but the actual size is 3.5 GB. $ ls -hl total 7.5G -rw-------. 1 root root 3.5G 2010-04-13 14:08 LFS.vdi How much size should I give when compiling and installing a Linux kernel? Are there any guidelines to follow when doing this? This is my first time, so just experimenting with this.

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• Apache2 BufferedLogs On - anybody using it ?

  - by Qiqi

  Greetings, I am wondering, whether anybody is using BufferedLogs On with Apache2 and found any issues ? Feature is marked as experimental, but for many years now, so I guess it's rather pretty stable. I am running some servers with constrained disk IO capacity at the moment, so I turned it on hoping that even a small benefit could help in the long run ;-) I do have several to several hundreds requests per seconds so by my thoughts there is really no need to write to log after each request, cause honestly I don't think that my filesystem is the best handler for many unnecessary writes. (OCFS2 shared among several DomUs in the Xen)

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• How can I configure Firefox to assume I have less memory?

  - by WoLpH

  Firefox has a few different settings that automatically get tuned based on the system ram. This is all great if you're running nothing besides Firefox, but when you're running half a dozen apps at the same time and they all assume that they can take a decent chunk of mem it just kills the box. Example settings: http://kb.mozillazine.org/Browser.sessionhistory.max_total_viewers http://kb.mozillazine.org/Browser.cache.memory.capacity How can I make Firefox automatically configure all these settings with the assumption that I only have 512MB of memory instead of 4GB (or whatever number, but you get the idea). I am running Ubuntu 12.04 with Firefox 14 Current workarounds: Running a Windows XP virtual machine with 512MB of ram. It actually runs smooth and takes less memory (including Windows) to run than having Firefox (or Chrome for that matter) run standalone. Install the 32 bit version of Firefox By installing the 32 bit version of firefox (apt-get install firefox:i386) the base memory usage is only about 50% of what it is with the 64 bit.

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• Get cryptic error when trying to create a snapshot of any of my VMs

  - by Zolt

  I'm using Oracle VM VirtualBox. I have 6 VMs that I've imported. When I click on an individual VM, and then click the camera image (or Ctrl+Shift+S) to take a snapshot, the snapshot process fails and VirtualBox gives the following error: Failed to create a snapshot of the virtual machine vmName. Details: Result Code: VBOX_E_IPRT_ERROR (0x80BB0005) This happens not only for one of my VMs, but all of them, if I try to take a snapshot of each one separately, one at a time. My computer is a Windows 7 machine. I have 200 GB free on my hard drive, and I see no reason why the error should occur. I can import VMs, run them, and clone then without any problems. Can anyone tell me what to do to fix the issue?

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• Pointing Domain to VDS Directory

  - by Jonathan Sampson

  I've got a domain name that is managed through 000Domains.com. I also have a virtual dedicated server hosted with GoDaddy.com. Within my VDS, I created a folder /mysite and placed all of my website files there. I can test this through the ipaddress of my VDS, but I would now like to point my domain from 000Domains over to my sub-directory hosted on GoDaddy. How do I do this? Do I need to make any specific modifications to my VDS to inform it that one of the directories will be accessible from a domain name? I have access to Simple Control Panel, if that is of any relevance.

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• How can I connect a SAS drive to USB? [closed]

  - by dave

  I have a Dell T710 with Seagate Cheetah 15k.7 SAS disks. If the T710 motherboard dies, I'll need to resort to one of my nightly off-site backups and salvage the journal/logfile from the SAS disk to bring the backup bang up-to-date. I need a way of reading the healthy-but-inaccessible SAS disc that does not depend on the only SAS-capable machine I have to hand. So I bought: SAS to SATA Adapter and: USB 2.0 to SATA Adapter with Power ...so that I could read the SAS drive via USB. I can plug it all together just fine. The chain looks like: USB - SATA - SAS. But the drive does not spin up and the computer doesn't even acknowledge anything being attached by USB. Is there a cheap external enclosure I can buy for SAS drives? I can't believe these USB to SATA adapters are everywhere but the USB to SAS adapters are almost non-existent...

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• IIS6 Permissions

  - by Gordon Carpenter-Thompson

  We have a set of IIS6 Jakarta/ASP.NET applications (implemented as virtual directories) on a machine without a domain. The directories all exist under the default website. We need to setup the permissions so that certain users can access only specific applications yet others users can access several of the applications. The way it's been setup previously has been to explicitly deny access to the users for every application except the ones that they are allowed to see. The problem is that the list of applications changes fairly often (for demos etc) and it's been known for the developers to forget to deny the old users access to the new applications which leads to security problems. This is all quite unmaintainable. Does anybody have any advice on this? Surely I can't be the only person to find this all a bit of a mess? Thanks

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• Scan dis problem on xp

  - by Sarfraz Ahmed

  hi, I have four drives on my computer. The problem is that each time i start a computer the scan disk check runs for a drive even if i shut down my computer properly. I ran the thorough scandisk check but still for that drive, the scandisk check is always performed no matter what. I wonder what is wrong although everything is fine and accessible along with drive data. Could you guys please help me out of this? I am using Windows XP SP2. Thanks

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• VirtuaWin shows Visual Studio 2010 in all Desktops

  - by w0lf

  I'm using VirtuaWin in Windows 7 to have virtual desktop functionality and I think this program is awesome. There's one small issue, though: on the computer at work, when moving to another desktop it hides all windows in the current desktop, except any windows of Visual Studio 2010. This means that VS 2010 shows up in all desktops, while for all other windows, VirtuaWin applies the correct behavior. The strange thing is that this issue happens on one computer only; on the others I have it works OK. I have checked the Window Rules section and nothing seems strange in there. Is anyone else experiencing this kind of problem? Any ideas on how to solve it?

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• Throughput = BS * IOPS?

  - by Marvin

  I've seen in many places that throughput = bs * iops should be true. For example writing at 128k block size to a SAS disk that can support 190 IOPS should give a throughput of ~23 MBps - 23.75(MBs) = 128(BS)*190(SAS-15 IOPS)/1024. Now when I tested it in a VM against a monster NetApp filer I got theses results: # dd if=/dev/zero of=/tmp/dd.out bs=4k count=2097152 8589934592 bytes (8.6 GB) copied, 61.5996 seconds, 139 MB/s To view the IO rate of the VM I used iostat and esxtop, and they both showed around 250 IOPS. So to my understanding the throughput was supposed to be ~1000k: 1000(KBs) = 4(BS)*250(IOPS). dd of 8GB is twice the size of RAM of course, so no page caching here. What am I missing? Thanks!

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• Reboot VPS by reaching memory limit

  - by Ali

  When a server uses memory more than available RAM, the system will shut down the virtual machine. Then, it is only possible to boot from outside (VPS control panel, e.g. vePortal or SolusVM). However, it should be possible to plan a reboot before possible shut down. What is the best practical method to check the used memory, and reboot the system upon reaching e.g. 90% of the allowed RAM? Is there a common program or script to do so? I am using Debian/Ubuntu.

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• VMware - I/O error - how to fix?

  - by Maya-G

  I'm running XP pro on VMware - it mounts and runs just fine. However, if I power down the VM and try to copy it, or even if I try to do a simple Mac Backup (using Carbon Copy Cloner), I get an i/o error at one very specific VMDK file. Here's a sample of the error - this from CCC: "12/20 22:49:30 Detected input/output error 12/20 22:49:33 rsync: read errors mapping "/Users/blahblah/Documents/Virtual Machines.localized/WindowsXP-Professional150G.vmwarevm/WindowsXP-Professional150G-000001-s065.vmdk": Input/output error (5)" How can I regain my ability to do backups of my Mac without this I/O error?

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• Data drive disappearing.

  - by Mike Keller

  We have a Windows 2003 R2 server with SP 2 here that randomly loses a partition. There are two partitions the C: and the D: (the one that disappears). When I go into Disk Management the space shows available on the drive but that it isn't formated. There are two drives that are set up in a RAID 1 array. There isn't anything sticking out in the event log as to something triggering this problem and thank god we do daily backups of the data, but it gets kind of annoying to have to go back in there and reformat the partition and restore the data. Any places I can poke around to find the cause of this or even better solutions to the problem would be appreciated.

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• IP Forwarding and Routing in Windows 2008

  - by Danialzo

  I have Hyper-V running on a windows 2008. I got a new ip stack from the data center to be set on my virtual machines. But I have difficulties to set these IPs on my VMs because they are on different network. my current server ip is xxx.xxx.18.6 with MASK : 255.255.255.224 and the GW is xxx.xxx.18.1 my new ip stack is xxx.xxx.168.176/29 I can use RRAS to achieve this. Do I need to create another NIC? How do I make these VMs reachable from outside?

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• copy boot-able partition

  - by Dima

  I have an disk image with 3 partitions: first partition (hd0,0) is boot-able with GRUB1 with the following configuration GRUB file: default=0 timeout=5 title Bank A root (hd0,1) chainloader +1 title Bank B root (hd0,2) chainloader +1 The partitions (hd0,1) and (hd0,2) are also boot-able. I'm trying to clone partition (hd0,1) to (hd0,2) by creating device map using kpartx and copying whole partition using dd command. The problem is: after partition cloning, the cloned partition did not boot (but all files are OK). What the wrong? I need both partitions to bee identical (I'm using them for fail-over purposes into embedded device)

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• Cannot Enter Credentials Over UAC Prompts During Remote Assistance

  - by user100731

  We are using sonicwall firewall device through out our network and we use the sonicwall virtual assistance tool for remote desktop assistance. Since our systems are not in workgroup and are on domain we face problem when the UAC prompts appear. As a work around we edited the UAC policies, such as switching to secure desktop-disable, Allowing UI Acess applications to prompt for elevation without using secure desktop-Enable etc. The ultimate result was we are able to see the UAC prompt on the remote user system but not able to interact with it like we are not able to enter credentials to it even I can see the password being entered if it is done by the local user. However, we cannot interact with UAC prompt window remotely. Is there any solution for this?

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• Should I disable write caching on my Windows 2008 VM?

  - by javano

  I have a Windows Server 2008 x64 Standard virtual machine that runs on a machine with a hardware RAID controller, a Perc 6/i, which has a battery on-board. Doing everything I can for additional performance, I think I should disable this. Is this very dangerous though? My understand is that Battery Backed Write Caching gives a performance boost to the host OS, telling it the write was complete when they are still sitting in flash waiting to be written. However, I can't see how it would be detrimental to performance, but is there a gain (even if marginal) to enabling it / disabling it? P.s. There machine has a backup power. Here is a screen shot for clarification:

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