URL:
<http://savannah.gnu.org/bugs/?27389>
Summary: grub-setup broke partition table
Project: GNU GRUB
Submitted by: garik
Submitted on: Sun 06 Sep 2009 11:35:32 PM GMT
Category: Disk & Partition
Severity: Major
Priority: 5 - Normal
Item Group: None
Status: None
Privacy: Public
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release:
Release: SVN
Reproducibility: None
Planned Release: None
_______________________________________________________
Details:
grub-r2575 installed on /dev/hda (120 Gb disk with 4 partitions: hda1 -
/boot, hda2 - swap, hda3 - /, hda4 - /home).
After my experiments with gettin' grub to boot system from cd, my partition
table on hda became broken.
--------------------------------------------
r...@garik:~# grub-setup -b cdboot.img '(hd0)'
r...@garik:~# grub-setup -b boot.img -b cdboot.img '(hd0)'
grub-setup: error: Cannot guess the root device. Specify the option
``--root-device''.
r...@garik:~# grub-setup -b cdboot.img '(hd0)'
grub-setup: error: Cannot guess the root device. Specify the option
``--root-device''.
r...@garik:~# grub-setup -r /dev/hda -b cdboot.img '(hd0)'
grub-setup: error: Invalid root device `/dev/hda'
r...@garik:~# grub-setup -r '(hd0)' -b cdboot.img '(hd0)'
grub-setup: warn: Attempting to install GRUB to a partitionless disk. This
is a BAD idea.
grub-setup: warn: Embedding is not possible. GRUB can only be installed in
this setup by using blocklists. However, blocklists are UNRELIABLE and its
use is discouraged.
grub-setup: error: If you really want blocklists, use --force.
r...@garik:~# grub-setup -r '(hd0,1)' -b cdboot.img '(hd0)'
grub-setup: error: no such partition
--------------------------------------------
After that partition table has been recreated with cfdisk (using `df`, `free`
info). It turned out that broken table and fixed table differs in only 3
bytes:
--------------------------------------------
$ cmp -l partition-table.broken partition-table.fixed
447 0 200
511 0 125
512 0 252
--------------------------------------------
With best regards,
Igor
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Sun 06 Sep 2009 11:35:32 PM GMT Name: partition-table.fixed Size:
512B By: garik
dd if=/dev/hda bs=512 count=1
<http://savannah.gnu.org/bugs/download.php?file_id=18679>
-------------------------------------------------------
Date: Sun 06 Sep 2009 11:35:32 PM GMT Name: partition-table.broken Size:
512B By: garik
dd if=/dev/hda bs=512 count=1
<http://savannah.gnu.org/bugs/download.php?file_id=18678>
_______________________________________________________
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<http://savannah.gnu.org/bugs/?27389>
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