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Bug#800639: os-prober: corrupts windows 7 loader/header

in-line :-

On 10/3/15, Steve McIntyre <steve@einval.com> wrote:
> On Fri, Oct 02, 2015 at 05:54:20AM +0530, shirish शिरीष wrote:
>>Package: os-prober
>>Version: 1.67
>>Severity: important


> Hi Shirish,

Hi Steve,

> Could you explain in a little more detail what you've seen please?
> What exactly do you mean when you say that it's corrupting the Windows
> 7 loader? What's the setup you're using on your machines (hardware,
> disk layout etc.)?

Thank you for taking time to respond to this bug.

What do I mean by it's corrupting the Windows 7 loader is that it
doesn't boot into MS-Windows. I had installed MS-Windows after
installing Debian (I know that is the wrong way to do it).

Of course, once MS-Windows comes in, it hogs the boot-loader and grub
is nowhere to be found

So then I used a live usb using GRML as a rescue option.

I used lsblk to see how all the partitions were.

Figured out that /dev/sda2 is the one which has the GNU/Linux
partition (I had mapped it before but still was good to know it still
was showing the same.)

Then mounted /dev/sda2 to a mount point

# mount /dev/sda2 /mnt

and then installed grub to the MBR

#grub-install --root-directory= /mnt /dev/sda

got the familiar boot screen with the correct version of grub showing
on the grub screen but no MS-Windows 7

Then installed os-prober . While it did find Windows 7 and put the
menu entry, trying to use it is worthless, I get some corrupting image
and then it fails to find some files.

$ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev             10M     0   10M   0% /dev
tmpfs           1.6G  9.4M  1.5G   1% /run
/dev/sda2        92G   18G   70G  20% /
tmpfs           3.8G  152K  3.8G   1% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           3.8G     0  3.8G   0% /sys/fs/cgroup
/dev/sda3       110G   89G   17G  85% /home
tmpfs           769M  4.0K  769M   1% /run/user/119
tmpfs           769M   32K  769M   1% /run/user/1000
/dev/sda4       260G   38G  222G  15% /media/shirish/alphanumeric-label

This is on a Thinkpad T-440, 500 GB , 8 GB RAM

Is there anything else I can help so that I am able to find a solution to this.

This is/was just to test the readiness of the tool as I have to
migrate a bunch of similar lappies in dual-boot mode.

Look forward for answers.

> --
> Steve McIntyre, Cambridge, UK.
> steve@einval.com
> We don't need no education.
> We don't need no thought control.

          Shirish Agarwal  शिरीष अग्रवाल
  My quotes in this email licensed under CC 3.0
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