Sunday, August 23, 2015

Windows Fastboot and Linux

Windows 8 hibernates in fast boot mode so you can boot faster. This will cause problems when you switch to other OS make changes to filesystems and then boot back to windows. Read about it here.

And as far as i tested it no issues! Still it is only read only access better than nothing. More details on the process below:


Source:

Unable to mount Windows (NTFS) filesystem due to hibernation

Workaround for all versions of Windows:
There are three ways to mount a hibernated Windows partition:

  1. Boot into Windows and power down the system by shutting it down completely. You may then boot back into Ubuntu and the partition will mount in read-write mode automatically when you open it in Nautilus.Note that the "Shut Down" option may not be the one displayed in your start menu by default. You may need to click the button next to it to see further options.
  2. Manually mount the filesystem in read only mode.
    • Check to see if you have a mount point (folder for mounting your partition in) for your Windows partition in the folder /media using this command:
      ls /media
    • If you don't see a folder for your Windows partition, you should create one with the following command:
      sudo mkdir /media/windows
    • Next, mount the partition in read-only mode onto this folder with this command:
      mount -t ntfs-3g -o ro /dev/sda3 /media/windows
      Note that you should change /media/windows if your mountpoint is called something else.
    • Now you will be able to view/open files on your Windows partition using any program in Ubuntu. However you will not be able to write to the partition or modify any files as it is in read only mode.
  3. If you need to mount the partition in read-write mode and are not able to or willing to boot into Windows and shut it down completely there is a third option. However, it is not included here because it completely deletes hiberfil.sys and will cause you to lose all unsaved information in the hibernated Windows programs. The following is a quotation from man ntfs-3g about the option that would be used to do this.
    remove_hiberfile               Unlike in case of  read-only  mount,  the  read-write  mount  is               denied  if  the  NTFS  volume is hibernated. One needs either to               resume Windows and shutdown it  properly,  or  use  this  option               which  will  remove  the  Windows hibernation file. Please note,               this means that the saved Windows  session  will  be  completely               lost. Use this option under your own responsibility.
Solution (only for Windows 8):
There is a new feature in Windows 8 called Fast Startup. If this feature is enabled (which it is by default), Windows 8 does not actually completely shutdown when you choose shutdown. Instead, it does a "hybrid shutdown". This is something like hibernating; it makes booting Windows 8 back up faster. So, you need to disable this feature to be able to shut it down properly, and be able to mount the Windows partitions. To do this, boot into your Windows 8 and:

Note: disabling Fast Startup will most likely make your Windows 8 take a longer time to boot. There are no "exact" numbers, but let's say that if it took you 10 seconds to boot into Windows 8, it will now take you 50 seconds after disabling this feature.
1. Open Control Panel in the small icons view and click on Power Options.
2. Click on Choose what the power buttons do.
3. Click on Change settings that are currently unavailable.
4. Uncheck Turn on fast startup (recommended).
Click on the numbers above to see screenshots.
Click on Save changes. Now, shutdown Windows 8 and boot back into Ubuntu.
If you still aren't able to mount without getting errors, you may need to turn off hibernation completely. Open an elevated Command Prompt (right click on the shortcut, click on “Run as Administrator”), and input:
powercfg /h off
Source: Fast Startup - Turn On or Off in Windows 8.

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