Re: Grub2 booting Dell Diagnostics

[Arbiel Perlacremaz]

Le 05/03/2015 19:56, Ole Reier Ulland a écrit :
> I have sent this e-mail to address@hidden without getting any useful 
> replies, so now I try this e-mail-address.
>
> The computer is a Dell Dimension 8300, with a SATA HDD with Grub2, Linux and 
> data partition, and a IDE HDD with Dell Diagnostics, Windows and data 
> partition.
>
> I had to give up on Grub because Grub seems not to be able to boot Windows on 
> a different HDD than where the Grub is, and bios is not able to start Grub on 
> an IDE HDD when there is a SATA HDD.
>
> I attempt to have the "Dell Diagnostics" partition to be bootable from Grub2 
> menu.
>
> Grub2 produces an option for booting Windows in the menu that is not in the  
> /boot/grub2/custom.cfg file. What I have done is to make a copy of the 
> automatically produced menu entry and made one myself in the custom.cfg file. 
> An identical copy booted Windows. So now is the question of how to change it 
> so it will boot the other partition on the same HDD. I changed the menu line, 
>  
> "msdos2" to "msdos1" since I am now booting the first partition and not the 
> second, and the UUID. I believe those to be correct, but what remains is the 
> file system type.
>
> QUOTE from /boot/grub2/custom.cfg,
>
> menuentry 'Dell Diagnostics (on /dev/sda1)' {
>     insmod part_msdos
>     insmod fat
>     set root='hd0,msdos1'
>     if [ x$feature_platform_search_hint = xy ]; then
>         search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-
> efi\=hd0,msdos1 --hint-baremetal=ahci0,msdos1 O7D4-0318

I don't know the value of ${feature_platform_search_hint}, whether it is
"y" or anything else, so your trouble may stem from something else. Your
search instruction, with a "\" between "--hint-efi" and "=hd0,msdos1" is
quite strange, isn't it ?

On the other hand, I wouldn't be surprised Andrei to be wright when he
writes

"This could mean that first sector of this partition (that you load and
execute) does not contain any valid bootcode at all. I won't be
surprised if BIOS is using some vendor-specific mechanism to start when
asked to boot from this partition."

As long as I can remember, the "Dell Diagnostics" partition is for the sole use 
of Dell technicians when they take control over your PC in a telemaintenance 
session.

>     else
>         search --no-floppy --fs-uuid --set=root 07D4-0318
>     fi
>     drivemap -s (hd0) ${root}
>     chainloader +1
> }
>
> END QUOTE
>
> When Grub2 boots Mageia4 on file system id "83" (Linux) the menu says, 
> "insmod 
> ext2".
> When Grub2 boots Windows on file system id "7" (HPFS/NTFS/exFAT) the menu 
> says, "insmod ntfs".
> What shall I then use in the menu in "insmod xxx" when I want to boot Dell 
> Diagnostics on file system id "de" (Dell Utility)? Unless this booting needs 
> something else, that the Windows partition did not need, it is not "fat", 
> "vfat" nor "DellUtility".
>
> As the menu entry is right now it only causes the computer to restart.
>
> Sincerely,
>
> Ole Reier Ulland
> Norway
>
> _______________________________________________
> Help-grub mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/help-grub
>

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