bugGNU GRUB - Bugs: bug #52387, grub rescue not finding gpt...


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bug #52387: grub rescue not finding gpt partitions

Submitted by:  Thomas Schweikle <tps800>
Submitted on:  Fri 10 Nov 2017 02:30:19 PM UTC  
Category:  None Severity:  Major
Priority:  5 - Normal Item Group:  None
Status:  None Privacy:  Public
Assigned to:  None Originator Name: 
Open/Closed:  Open Release: 
Release:  2.02 Reproducibility:  Every Time
Planned Release:  None

Fri 10 Nov 2017 02:30:19 PM UTC, original submission:

Grub 0.96 installed on hd0, partition 3, /grub.
Grub 2.02 installed in /helenos/32/grub on hd0, partition 2.

In grub1 /grub/grub.conf:
title HelenOS
root (hd0,2)
kernel /helenos/32/grub/i386-pc/core.img

Selecting this entry while booting loads core.img:

Welcome to GRUB!

error: no such partition
Entering rescue mode ...
grub rescue>

Trying to list partitions:
grub rescue>ls
(hd0) (hd1) (fd0)

grub2 does not list any partitions!
consequently all found tutorials working with grub-rescue-mode fail:
grub rescue> set prefix=(hd0,2)/helenos/32/grub
grub rescue> set root=(hd0,2)
grub rescue> insmod normal
error: no such partition.

At this point you are lost. Since grub dos not find partitions (I could test msdos and gpt both behave the same). It can not load any modules. I've tried:

to install grub2 using "grub-install /dev/sda2", then chainloading from grub1:

> root (hd0,2)
> chainloader +1
> boot

same as before. Grub2 tells me "no such partition". I've even tried to put grub into (hd0,2)/grub. But again without success. Same error again.

Thomas Schweikle <tps800>


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