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• How do boot sectors and multiple drives works?

  - by GiH

  I don't fully understand the concept of a boot sector, I was hoping someone could clear this up for me. If you have two hard drives, with an OS installed on each, does each drive have its own boot sector? Does each drive need an MBR partition? I've got Linux and Windows on two separate drives. I've had issues when installing Linux and grub, and now I've finally decided to use the Windows bootloader to start up. Would Windows have gotten rid of grub when i used /fixmbr or does it stay there on the boot sector of the other drive?

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• How to turn off the binary log for mysqld_multi instances?

  - by netvope

  MySQL supports running multiple mysqld on the same server. One of the ways is to use mysqld_multi. If the default MySQL server instance (as configured in the [mysqld] section in my.cnf) uses log-bin, it enables the binary log for all the other instances ([mysqld1], [mysqld2], etc). How can we override the setting for the other instances? We tried putting log-bin= or log-bin=OFF under [mysqld1], but that won't disable the binary log.

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• Can thousands of backlinks from the same site harm PageRank?

  - by Dejan Pelzel

  I just noticed that one particular site has almost 7000 backlinks linking back to our website. The site is something like a news aggregator and for each post they created around 20 (sometimes much more) backlinks back to our page and they basically linked over 400 pages. I am beginning to get concerned that this amount of links might harm our page. They seem to have more backlinks to our page than all the other pages combined and more backlinks that our website has pages. We have seen a massive negative effect going on for quite a while and the PageRank seems to have dropped to None (Not even 0). But I am not sure when and why exactly that happened seeing that PageRank updates take quite a while to appear. The site linking to us is otherwise pretty reputable and doesn't seem to be having any problems with their rank. (PR 6 actually) I was thinking of using the Google disavow tool for this site, but I don't want to make things even worse. Do you think these are harmful? If so, how do I fix this? Thanks :)

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• How can I dual install Ubuntu 10.4 in a Mac Mini with 10.4.11?

  - by Marco Mariani

  I'd like to power-up my aging Mac Mini (1.5GHz Core Solo, 1GB RAM, Tiger 10.4.11) by installing a shiny Ubuntu alongside the current OS. After all, I use Ubuntu for everything save for cleaning my teeth. Since it's my first and only Mac and I have next to no experience with the OS (having used it basically as a media player) I am a little concerned about rEFIt, ELILO, Boot Camp and the fact that it's basically a 4.5 years old unsupported machine and I might get asleep reinstalling everything several times. I've used the live desktop-i386 CD and everything works. I tried with an external USB drive instead of a CD but couldn't make it boot. As for installing Ubuntu, the howtos I've found give several alternatives depending on the model, the OSX version, etc.. but they usually talk about newer machines. Which howto should I follow to repartition, and boot thereafter? Thanks

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• Two people using the same computer at the same time remotely!

  - by Mani

  We have two computer in office and two people. My computer is much more faster than another computer. Is it possible my colleague connect to my computer remotely and work by my computer? Using "Remote Desktop" in Windows only one user can log into computer. So when he connect remotely, my user logged off. Is there a tool which can help in this case? I already knew VNC (RealVNC) But it's not helping because when a user connect to my computer, he see exactly my desktop, not his own user desktop.

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• Multicore license: ESX Vs Citrix Xenserver

  - by maruti

  VMware ESX is free for upto 6 cores per CPU only Vsphere Advanced version is required for 12 CPU cores does Xenserver 5.5 free support greater than 6 cores per CPU/Socket?

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• Install GRUB on NTFS

  - by karatchov

  I would like to install 2 completely independent instances of Windows XP (no data should be shared) in my computer within 2 different primary partitions. I know that grub can handle booting them correctly, but I have no idea if it's possible to install it and configure it within a 100% NTFS system and without any extra linux partition/distribution.

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• Windows 7 won't boot from any bootloader except for Windows Boot Manager after partition resize

  - by user2468327

  I have a triple boot system on a single SSD: OSX, Windows 7, and Ubuntu. I use Chimera (basically another version of Chameleon) as my bootloader. Usually I can boot all 3 OSs without any issue, but after using GParted to make my Ubuntu partition 2 Gigs larger, Windows 7 throws me an error when trying to boot to it from either Chimera or Grub. The error is consistently: `0xc000000e can't find \Boot\BCD" (slightly paraphrased). However, I can still get into Windows by selecting Windows Boot Manager from the boot options in my BIOS. I've already tried several known fixes for similar issues, including bootrec /rebuildbcd (and variations), and BootRec.exe/fixMBR + BootRec.exe/fixBoot. I've also tried Chkdsk. At best this has made it so Windows 7 boots on its own by default (making me have to reinstall Chimera and change back my boot settings in the BIOS). At worst this made it so Windows won't boot period. Now I'm back full circle where I started. A detail that might be useful is that bootrec /rebuildbcd says that the number of found Windows installations is 0. I'm fairly certain that I don't have a hybrid MBR. Mainly because I have a UEFI BIOS, and with that, it appears each OS can support a GPT. So it would kind of pointless to have and deal with. I may be wrong though, I couldn't find any way of finding out for sure online. However, I know for sure that the version of Windows I have installed is the UEFI version, as well as every partition tool I've used to look at my boot drive tells me it's GPT. How do I get it back so I can boot Windows 7 through another bootloader so I don't have to manually select it in the BIOS? Preferably without a reinstall.

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• Performance degrades for more than 2 threads on Xeon X5355

  - by zoolii

  Hi All, I am writing an application using boost threads and using boost barriers to synchronize the threads. I have two machines to test the application. Machine 1 is a core2 duo (T8300) cpu machine (windows XP professional - 4GB RAM) where I am getting following performance figures : Number of threads :1 , TPS :21 Number of threads :2 , TPS :35 (66 % improvement) further increase in number of threads decreases the TPS but that is understandable as the machine has only two cores. Machine 2 is a 2 quad core ( Xeon X5355) cpu machine (windows 2003 server with 4GB RAM) and has 8 effective cores. Number of threads :1 , TPS :21 Number of threads :2 , TPS :27 (28 % improvement) Number of threads :4 , TPS :25 Number of threads :8 , TPS :24 As you can see, performance is degrading after 2 threads (though it has 8 cores). If the program has some bottle neck , then for 2 thread also it should have degraded. Any idea? , Explanations ? , Does the OS has some role in performance ? - It seems like the Core2duo (2.4GHz) scales better than Xeon X5355 (2.66GHz) though it has better clock speed. Thank you -Zoolii

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• How to install Ubuntu, Windows XP and Windows 7 from scratch as triple-boot system

  - by simon

  I'm currently running Windows XP, but have ordered Windows 7. I want to keep Windows XP on a separate partition, and install Ubuntu as well. In which order should I install the OSs, and is there anything differing from an ordinary single-system install I should keep in mind? For example, does the order of partition make any difference? If I want to have the system drive as "C:" drive in both Win XP and Win 7, what should I do?

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• How to get Windows Server 2008 VM to use multiple cores

  - by David Fraser

  I have a Windows Server 2008 machine running in VirtualBox. On initial installation, only one processor was made available, but now I want to run it as a multiprocessor machine. I have made all four cores available in the VirtualBox settings (as well as enabling VT-x/AMD-V and Nested Paging), but Task Manager still only shows one CPU. However, the four CPU cores are visible in Device Manager under Processors. In the event log on startup, I can see the following relevant events: EventLog.6009 Microsoft (R) Windows (R) 6.00.6002 Service Pack 2 Multiprocessor Free Kernel-Processor-Power.4 Processor 0 exposes the following: 1 idle state(s), 0 performance state(s), 0 throttle state(s) Kernel-Processor-Power.4 Processor 255 exposes the following: 0 idle state(s), 0 performance state(s), 0 throttle state(s) Kernel-Processor-Power.4 Processor 255 exposes the following: 0 idle state(s), 0 performance state(s), 0 throttle state(s) Kernel-Processor-Power.4 Processor 255 exposes the following: 0 idle state(s), 0 performance state(s), 0 throttle state(s) How can I make this system actually boot up as a multiprocessor machine?

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• GRUB Error after Deleting Linux Partition

  - by Nironan12

  I was dual-booting with Windows 7 and Windows Vista each taking up half of my hard drive. In Windows 7 I used Easeus Partition Manager to shrink my Windows 7 volume 8GB. On the unallocated space, I installed Linux Mint 8 RC1. After a little bit of playing around with it, I booted in Windows 7, used EPM again and deleted the 8GB Linux partition. I then extended Windows 7 on the 8GB. After restarting my computer, all I get is a black screen and this: GRUB loading. error: no such partition grub rescue> I do not have a Windows 7 disk nor does my computer come with Startup Repair. What do I do?

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• local install of wp site brought down from host - home page is ok but other pages redirect to wamp config page

  - by jeff

  local install of wp site brought down from host - home page is ok but other pages redirect to wamp config page. I got all local files from host to www dir under local wamp. I got database from host and loaded to new local db and used this tool to adjust site_on_web.com to "localhost/site_on_local" now the home page works great and can login to admin page but when click on reservations page and others of site then site just goes to the wamp server config page even though the url shows correctly as localhost/site_on_local/reservations my htaccess file is this # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteRule ^index\.php$ - [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> # END WordPress and rewrite-module is checked in the php-apache-apache modules setting. now when I uncheck the rewrite-module is checked in the php-apache-apache modules setting or I clear out the whole htaccess file then the pages just goto Not Found The requested URL /ritas041214/about-ritas/ was not found on this server. Please help as I am unsure now about my process to move local site up and down and be able to make it work and without this I am lost...

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• How can I dual install Ubuntu 10.4 in a Mac Mini with 10.4.11?

  - by Marco Mariani

  I'd like to power-up my aging Mac Mini (1.5GHz Core Solo, 1GB RAM, Tiger 10.4.11) by installing a shiny Ubuntu alongside the current OS. After all, I use Ubuntu for everything save for cleaning my teeth. Since it's my first and only Mac and I have next to no experience with the OS (having used it basically as a media player) I am a little concerned about rEFIt, ELILO, Boot Camp and the fact that it's basically a 4.5 years old unsupported machine and I might get asleep reinstalling everything several times. I've used the live desktop-i386 CD and everything works. I tried with an external USB drive instead of a CD but couldn't make it boot. As for installing Ubuntu, the howtos I've found give several alternatives depending on the model, the OSX version, etc.. but they usually talk about newer machines. Which howto should I follow to repartition, and boot thereafter? Thanks

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• Make a bootable USB drive that can install both Windows XP and Ubuntu

  - by Utkarsh

  I have ISO images for both Ubuntu and Windows XP. I want to host both of them on a USB drive so that I can install either without needing installation CDs (I don't have a CD drive). How can I do that? SO, I want to have both Windows XP and Ubuntu on my USB Drive so that i could install any one of tem just from a USB. I do not have CD Drive thats why i wanna do that. I have ISO image of both ubuntu and windows xp

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• Running a VM on a hyperthreaded CPU

  - by gbrandt

  Is it better to run a VM on a dual core hyperthreaded machine as a four core or as a two core VM. The hyperthreaded 'virtual' cores are not as fast as the real cores. Does this effect the VM?

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• How do I make a USB stick from which to install different OS's?

  - by Hanno Fietz

  Recently, I have made a number of USB sticks to install OS's (several Linux flavors, BSD, Windows) from, on machines that didn't have CD drives. Now, I would prefer to not overwrite the install USB sticks all the time, since it's handy to have them, but neither do I want to pile up USB sticks that I only need every 6 months. It would be great to have a bootable USB stick that fires up some minimal system, lets you choose an ISO image and then reboots from there. How would I go about this? Do I use some minimal Linux? Is there some kind of modified / specialized boot loader? Can I set up GRUB to do this? Should I use virtualization?

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• nvidia twinview in ubuntu with large resolutions not working

  - by knittl

  i bought an external monitor and can't get it to work properly with my laptop screen. my laptop screen has a resolution of 1920x1200 and the new monitor has 1920x1080 when i open nvidia-settings and select the maximum resolution for each of the screen, one screen will always stay blank. if i select a smaller resolution for one of the two it will work. 1920x1200 + 1440x900 = works 1680x1050 + 1920x1080 = works 1920x1200 + 1920x1080 = doesn't work (but that's what i want to have!) my graphics card is an 01:00.0 VGA compatible controller: nVidia Corporation Quadro FX 360M (rev a1) (output from lspci), driver is proprietary nvidia driver, operating system is ubuntu. any help greatly apreciated

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• Using URL rewrite module for http to https redirect

  - by johnnyb10

  Following ruslany's suggestion on the URL Rewrite Tips page here, I'm trying to use URL Rewrite to redirect http:// requests for my site to https://. I've written and tested the rule using a test site I set up, and so now the final piece is to create a second site (http) to redirect to my https site. (I need to use a second site because I don't want to uncheck the "Require SSL encryption" checkbox on my existing site.) I'm an IIS newbie so my question is: how do I do this? Should I create a site with the same name and host header, only it will be bound to http? Will IIS let me create a site with the same name? I don't want to screw anything up with my existing site (which is a SharePoint site, currently used by external users). That site currently has http and https bound to it. So my assumption is that, using ISS (not SharePoint), I will create a new site (http only) with the same name and host header as my existing site, and add the URL Rewrite rule to the http site. And then I guess I should remove the http binding from my existing site? Does that seem correct? Any advice, gotchas, etc., would be appreciated. Thanks.

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• How to stop OS X from switching input method (keyboard layout) automatically?

  - by adolf garlic

  After using the wireless keyboard that comes with the iMac, I have switched to a MS Ergo Natural 4000 one. Surprisingly I had to install extra software as OS X could not work out which keyboard I had. After which I went into sys prefs and set the main input method to be "British - Microsoft" first and "Swiss German" second (what the wireless keyboard is), on the "input sources" tab: However... OS X keeps resetting my input method back to Swiss German which is driving me bananas. I have the flag thingy top right so I can see when this changes. N.B. I have "input source options" set to "use the same one in all documents" which I am assuming means keep the language the same for anything running. It also flips back on the login page. Does anyone know how to fix this?

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• Does Windows 7 Home Premium support Dual Core Processors?

  - by nicon

  I'm looking to buy a new laptop (the new studio 14 from Dell). The processor for this laptop is an Intel Core i5-520M. Think link http://reviews.cnet.com/8301-31012_7-10379487-10355804.html says that it supports only 1 CPU. Also Dell recommend the Professionnal version even tough Home Premium is the default choice. So I'm a little confuse as does Windows 7 Home Premium support Dual Core Processors ?

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• Using URL rewrite module for http to https redirect

  - by johnnyb10

  Following ruslany's suggestion on the URL Rewrite Tips page here, I'm trying to use URL Rewrite to redirect http:// requests for my site to https://. I've written and tested the rule using a test site I set up, and so now the final piece is to create a second site (http) to redirect to my https site. (I need to use a second site because I don't want to uncheck the "Require SSL encryption" checkbox on my existing site.) I'm an IIS newbie so my question is: how do I do this? Should I create a site with the same name and host header, only it will be bound to http? Will IIS let me create a site with the same name? I don't want to screw anything up with my existing site (which is a SharePoint site, currently used by external users). That site currently has http and https bound to it. So my assumption is that, using ISS (not SharePoint), I will create a new site (http only) with the same name and host header as my existing site, and add the URL Rewrite rule to the http site. And then I guess I should remove the http binding from my existing site? Does that seem correct? Any advice, gotchas, etc., would be appreciated. Thanks.

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• Can't boot into Linux partition after installation

  - by Otto

  I just installed Ubuntu. I created a partition in MacOSx using Disk utility, then deleted the partition and installed Ubuntu on the free space created. After the installation, Ubuntu said it would reboot. I hang on shutdown (which is normal, as google told me), so I used the power button to turn the MacBook off. Now I want to boot into Ubuntu. Pressing option/alt on startup only shows me the MacOSx and Windows partition. Also, the Linux partition isn't showing up on my MacOSx desktop. And in Disk Utility, I can see 3 grayed out partitions: "disk0s4", "disk0s5" and "Linux Swap". What can I do to boot into Ubuntu without losing my other partitions? Thank you for your help.

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• Grub problem with dual boot Ubuntu & XP (Ubuntu installed first)

  - by c00lryguy

  I had Ubuntu installed and I installed XP. I tried to be able to dual boot them by running an Ubuntu live cd and running ~ $ sudo grub grub> root (hd0,0) grub> setup (hd0) But now when I restart I get a black screen that says 'Boot device Selected Boot Device and press any key No matter what key I press it shows this error This is what my system looks like: /dev/sda1 - Ubuntu - ext3 - 73 GiB /dev/sda2 - Ubuntu - extended - 3.16 GiB /dev/sda5 - Ubuntu - linux-swap - 3.16 GiB /dev/sdb1 - Windows XP - ntfs - 76 GiB /dev/sdc1 - Stuff - ext3 - Code/Documents /dev/sdd2 - Stuff - ext3 - Movies/Music

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• azure website restart and take old dll version

  - by vipul dumaniya

  One of my site is hosted on windows azure and when azure restart site from manage windows azure panel. then it take old version dll and site is down until we restart the site by deploying global.asax or change in web.config to restart the site. after deployment of global.asax or change in web.config site is restart and then it work perfectly and take latest dll. so if any issues with my code then it should not work after the restart by deploying global.asax file so i think issues is not from code side. Error like "Could not load type 'DSF.DATA.Repository.RecurringOrderLogResposity' from 'DSF.DATA Version 1.0.0" I am just deploying changed dll using FTP & site restart and take effect successfully I have already resolve this error and uploaded latest dll too but when site restart from azure panel it back and then site down until i restart the site by deploying global.asax file so i think issues is not from code side. please please help I am in big trouble as my site is live site and there are lot of traffic Thanks Vipul

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