install grub with plop

[Dongalor]

Hi,

I'm trying to reinstall the grub. I'm trying to do the following :

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mkdir /mnt/system
mount /dev/sda /mnt/system
mount --bind /dev /system/dev
chroot /mnt/system /bin/bash
grub
root (hd0,0)
setup(hd0)

"mount --bind /dev /mnt/system/dev", fails wiht:

"wrong fs type, bad option, bad superblock on /dev/, miising codepage or other error"

There is a proper way to reinstall grub using plop?

Thanks in advance

[Elmar]

hi,

you don't have to mount and chroot.  starting grub and using

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root (hd0,0)
setup(hd0)

is enough.

hint: when you don't know the device number, then you can use "find" to get the correct device number. when your menu.lst is on a partition in /boot/grub/menu.lst then use "find /boot/grub/menu.lst"
when your /boot is an own partition then use "find /grub/menu.lst"

regards
elmar

[Dongalor]

Hi Elmar,

I thought to chroot into the partition because find comand fail.

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grub> find /boot/grub/menu.lst
Error 15: File not found

whitout chroot, if I do:

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grub> root (hd0,0)
Filesystem type is ext2fs, partition type 0x83

And thats ok, but then

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grub>  setup (hd0)
checking if "/boot/grub/stage1" exists.... no
checking if "grub/stage1" exists.... no
Error 2  Bad file or directory type


[Elmar]

post the output of "ls /mnt/system" when you mounted the device there

[Dongalor]

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[root@rescue system] ls
bin         dev      initrd.img    media   proc   selinux   tmp   vmlinuz
boot      etc       lib                mnt        root    srv          usr
cdrom   home  lost+found   opt        sbin    sys         var   


[Elmar]

and "ls /mnt/system/boot"

[Dongalor]

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[root@rescue boot] ls
config-2.6.26-2-686  grub  initrd.img-2.6.26-2-686.bak     config-2.6.26-2-686  initrd.img-2.6.26-2-686.bak  vmlinuz-2.6.26-2-686



[Elmar]

and "ls /mnt/system/boot/grub"

[Dongalor]

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[root@rescue grub]
default                    fat_stage1_5          menu.lst~                       stage1
device.map           jfs_stage1_5           minix_stage1_5          stage2
e2fs_stage1_5     menu.lst                   reiserfs_stage1_5      xfs_stage1_5


[Elmar]

ok, there is no menu.lst, so you have to use "find /boot/grub/stage1"
searching for stage1 is better than menu.lst because stage1 is an initial part of grub.

i think you will get (hd0) for root and not (hd0,0) because in your first post you said mount /dev/sda and not sda1

root (hd0)
setup (hd0)

[Dongalor]

ups, my fault about sda1, but menu.lst exist.

I tried to find stage1 and 2 before and also find fails...

the

root (hd0)
setup(hdo)

without chroot

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root (hd0)
Filesystem type unknown, using whole disk
setup (hd0)
Error 17: cannot mount selected partition


[Elmar]

hmm, i have no idea why the does not work.
(with sda1 its hd0,0)

there is only the one sata hard disk in the pc?

[Dongalor]

Hi Elmar,

I'm using a 4GB Compact Flash as a hd, and a 4GB USB pendrive to run plop.

edit: I'm using version 4.0.5

[Elmar]

mount again sda1 to /mnt/system and do a "touch /mnt/system/x"
umount sda1 and then in grub do a "find /x"

[Dongalor]

same result

File not found

[Elmar]

"find /ploplinux/ploplinux"

[Dongalor]

(hd1,0)

[Elmar]

please post the file device.map from the grub directory

[Dongalor]

(hd0)   /dev/sda
(hd1)   /dev/sdb

[Elmar]

hmm, try a fsck /dev/sda1

[Dongalor]

fsck result clean.

[Elmar]

its difficult to find the problem when i am not in front of the machine. i don't know how you copied the linux to the hd. for a test, i would copy the linux files away, format the partition and create again the "x" file and try to find it with grub

[Dongalor]

I know it's difficult for you, I really appreciate your help.

I've formated the partition with "mkfs.ext3 /dev/sda1" and created the "x" file with touch.

Same results with find in grub.

I copied the linux files aprox. the same way.

-mkfs.ext3 /dev/sda1
- mount partition
- untar a tar.gz