Dual-boot, ubuntu works, win7 disk read error

[YannBuntu]

Hello

After recommended repair:
http://paste.ubuntu.com/1393757/

You are affected by this bug of GRUB2.00: https://bugs.launchpad.net/ubuntu/+s...2/+bug/1061255

There is a workaround, but i haven't automatized it yet into Boot-Repair (because i want to be sure it is reliable), so you'll have to do it manually. Please tell us if you succeed, and exactly how (which commands you used).

[oldfred]

@Yann,
I had not seen this bug on LDM.
But would another workaround just be to add our own Windows chain entry with msdos mod not ldm mod? Or like we used to have to do with grub legcy as legacy almost never found Windows 7 to add chain entries.

LIke this with correct Windows UUID.

menuentry "Windows 7 (loader) (on /dev/sda1)" {

 insmod ntfs
set root=(hd0,1)
search --no-floppy --fs-uuid --set 2ae000d2e000a663
chainloader +1

 }

Or even this which someone once suggested. This assumes Windows on sdb1?
menuentry "Windows 7"
{

drivemap -s (hd0) (hd1)
set root='(hd1,msdos1)'
ntldr /bootmgr

}

@dyeabog
IF willing to experiment a bit, copy the entry below which I edited with your sda1 UUID to 40_custom and see it that will boot.

#Add menu entry to 40_custom,
gksudo gedit /etc/grub.d/40_custom

#update grub menu
sudo update-grub

menuentry "Windows 7 (loader) (on /dev/sda1) test" {
insmod ntfs
set root=(hd0,1)
search --no-floppy --fs-uuid --set 908A5B7D8A5B5F32
chainloader +1
}

If that works you can turn off os-prober to hide the incorrect entries. If you reconfigure or add another system, you can just turn it back on with false.

#Turn off prober
gksudo gedit /etc/default/grub
#Add this line
GRUB_DISABLE_OS_PROBER=true

[dyeabog]

@oldfred:

It worked perfectly! I can start Windows 7 and login and see my files and I can start Ubuntu and everything works too!

If it isn't too much trouble, why did this menu entry work and not the other ones?

Thanks again!

[oldfred]

Glad to know that works and it is a lot safer to suggest to users than the dd option in the bug report.

[YannBuntu]

Good job Fred