Re: GRUB2 not able to read ext4/xfs file systems on 8 TB drive

[Nathan Stratton Treadway]

On Mon, Apr 20, 2020 at 17:54:25 +0200, Niklas Hambüchen wrote:
> Hi Pascal, thanks a lot for your answer.
> 
> > Is the firmware able to address 8 TB capacity ?
> 
> I am not quite sure how to find out.
> 

It was on a much older generation of equipment, where we were
discovering that the BIOS couldn't access the full 32G Compact-Flash
card we were trying to use, but on this particular box I was able to use
"ls (hd0)" at the grub prompt to see grub's idea of the size of the
device (which presumably was based on the BIOS's access limits):

====
grub> ls
(hd0) (hd0,msdos5) (md0,msdos1)
grub> ls (hd0)
Device hd0: No known filesystem detected - Sector size 512 - Total size
8257032KiB
====

Since 8257032KiB is nowhere near 32G, we figured the BIOS couldn't
access the full disk (and so we used a small /boot partition to do the
install).

(In the context of your discussion, I guess you would need to do this
test from a grub that is *not* using the native grub device drivers.)

                                                Nathan



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