Re: Unable to boot Windows partition using ntldr

[Andrei Borzenkov]

В Fri, 19 Jun 2015 18:10:55 -0700
address@hidden пишет:

> Hello list!
> 
> I'm encountering an issue with GRUB 2.02.beta2-5 in which I can't seem 
> to chain load a windows partition on my USB stick
> 
> The relevant portion of my config is included below:
> 
> --grub.cfg
> 
> insmod part_msdos
> set winpe3=(hd0,msdos6)
> 
> menuentry "Windows PE 3.1" {
>    insmod ntldr
>    insmod ntfs
>    set root=${winpe3}
> 
>    ntldr /bootmgr
> }
> 
> --end cfg
> 
> When booting my Windows PE installation from this configuration, I 
> receive the error below:
> 
> --
> File: \Boot\BCD
> Status: [octal garbage]
> Info: An error occurred while attempting to read the boot configuration 
> data.
> --
> 
> The error seems to obviously point to the boot configuration data as 
> being corrupted or incorrect. However, when I bypass GRUB and boot 
> directly from /dev/sda6,

How do you boot directly from sda6? It is extended partition and
normally only primary partitions are bootable.

>                          Windows PE boots completely normally, 
> suggesting that not only is the BCD data completely fine, but even the 
> PBR seems to be working properly. I have also tried chainloading using 
> the following configuration
> 
> --grub.cfg
> 
> insmod part_msdos
> set winpe3=(hd0,msdos6)
> 
> menuentry "Windows PE 3.1" {
>    insmod chain
>    insmod ntfs
>    set root=${winpe3}
> 
>    chainloader +1
> }
> 
> --end cfg
> 
> This configuration doesn't even get me as far as the bootmgr error. 
> Instead, I just get the less than descriptive message, "Boot error".
> 
> Everything I have seen gives me more than ample reason to believe the 
> boot data on this partition is completely valid. That leaves me with the 
> conclusion that I have somehow misconfigured GRUB. Does anyone have any 
> pointers for additional troubleshooting? Any suggestions or help greatly 
> appreciated! Thanks in advance!
> 
> --
> James Lott
> 
> _______________________________________________
> Help-grub mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/help-grub