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David Mohr
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The grub configuration is stored in your Linux file system, usually under | ||
/boot. Grub-choose-default for Windows needs access to the grub/ subdirectory | ||
of that folder. | ||
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If you have your root or boot directory on an ext2/3 partition, then you can | ||
easily make it available under Windows using the ext2 Windows FS driver from | ||
http://www.fs-driver.org/ | ||
Note that this driver, Ext2IFS, does not work with larger partitions. The | ||
correct setup here is to put /boot on its own partition. Then Ext2IFS will | ||
work just fine. | ||
There is another ext3 driver project, called Ext2Fsd. At least at version 0.48 | ||
the driver was unreliable - it created a "shadow" grub environment, and | ||
broke grub-choose-default until the shadow file was manually removed. | ||
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Unfortunately Ext2IFS does not work well under Windows 7. Although it can be | ||
installed by running the installer in Windows Vista compatability mode, it | ||
forgets the drive letter assignments after every reboot. As a workaround you | ||
can let grub-choose-default mount the partition for you. Rename the | ||
"mount.vbs.example" script in the configuration directory mentioned below to | ||
"mount.vbs" and adjust it according to the comments in that file. It is a | ||
simple process that just requires one command line. "mount.vbs" will be | ||
automatically executed if present. | ||
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Once grub's directory is available under Windows, grub-choose-default should | ||
automatically find it by probing all available Windows drive letters. | ||
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It searches for a "boot\grub" or just "grub" directory. If you do not want | ||
grub-choose-default to search for the folder, or you want to improve the program | ||
start-up time, you can set the hidden option 'grub_dir' in the configuration | ||
file. | ||
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The backslash, "\", must be quoted, e.g., | ||
* Dependencies * | ||
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Changing grub defaults requires access to the Linux filesystem where grub's | ||
configuration files are located. This requires a Windows filesystem driver to | ||
be installed. Such a driver is not packaged with grub-choose-default, but read | ||
on for a description of the common ext2/3 solution. If you know of other | ||
filesystems that have Windows drivers please contact the author and this | ||
document will be updated. | ||
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* Ext2/3 * | ||
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There is a stable driver available at http://www.fs-driver.org/ . | ||
Unfortunately there are some restrictions: | ||
- It does not work with some large partitions. You don't run into this issue | ||
if you setup /boot to be on its own partition. | ||
- Windows 7 is not fully supported. See below for a workaround. | ||
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There is another driver, Ext2Fsd, which has been updated more recently. | ||
However, as of version 0.48 it was buggy and I advise against its use. | ||
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* Hidden Configuration Options * | ||
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Grub-choose-default saves its configuration in the standard locations: | ||
- Windows XP: | ||
C:\Documents and Settings\$USER\Application Data\grub-choose-default | ||
- Windows 7: | ||
C:\Users\$USER\AppData\Roaming\grub-choose-default | ||
Note that you probably need to turn on hidden files to see navigate to these | ||
directories. | ||
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The grub configuration is found by searching through all drives for a 'grub' | ||
or a 'boot/grub' directory. Sometimes this triggers error messages because | ||
media detection failed. If you want to avoid this, you can pin | ||
grub-choose-default to look only at a specific drive: Open the 'config' file | ||
in the above location, and add to the end of the file: | ||
grub_dir=D:\\grub | ||
The configuration file is located in the "Application Data\grub-choose-default" | ||
folder inside your profile (usually "C:\Documents and Settings") under Windows | ||
XP. Windows 7 hides that folder in | ||
C:\Users\$USER\AppData\Roaming\grub-choose-default | ||
The default configuration is created after the the first program run. Add the | ||
grub_dir line to the end of the file. | ||
Where D: is the drive that contains your grub configuration. And don't forget | ||
the double backslash in place of a single one. | ||
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* Windows 7 * | ||
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The driver from http://www.fs-driver.org/ refuses to install at first. However | ||
in Windows Vista compatibility mode the installer will work, and at first it | ||
will operate as expected. You can choose the compatibility mode by | ||
right-clicking the executable. | ||
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After a reboot it will forget the drive letter that you assigned. You can go | ||
into the control panel and assign the letter again, but this process is quite | ||
cumbersome. Grub-choose-default can do this for you if you adjust some | ||
settings in the 'mount.vbs.example' file which ships in the configuration | ||
directory mentioned above. In this file you might want to change the drive | ||
letter, but you must enter the correct volume name and save it as 'mount.vbs' | ||
in the same directory. | ||
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The volume name can be found by trial and error: Open a command prompt | ||
(Start->Run->cmd.exe) and run 'mountvol'. It will print the volume names of | ||
all partitions on your computer. Try those do not have a drive letter | ||
assigned and run 'mountvol l: <volume-name>'. If it is not the desired | ||
partition, you can remove the drive assignment by running 'mountvol l: /d' and | ||
try the next one. | ||
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Happy booting! | ||
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* Feedback * | ||
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If you have suggestions or found a bug, please let me know at david@mcbf.net . |