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Error during Install grub on img using loop devices


From: Divya Thaluru
Subject: Error during Install grub on img using loop devices
Date: Fri, 26 Jun 2015 19:43:36 +0000
User-agent: Microsoft-MacOutlook/14.4.8.150116

Hi,

I am using grub 2.00 . I am trying to install grub msdos partition on a raw image. But grub-install fails looking for lvm disks.
Please let me know what I am doing wrong. I built grub from source tar ball.

./configure \
--prefix=%{_prefix} \
--sbindir=/sbin \
--sysconfdir=%{_sysconfdir} \
--disable-grub-emu-usb \
--disable-efiemu \
--disable-werror

Make
Make install

Please let me know for any information.

These are the repro steps :

losetup --show --find XXX.raw —> return /dev/loop0
kpartx -av /dev/loop0 —> adds maps loop0p1
mkfs.ext4 /dev/mapper/loop0p1
mount /dev/mapper/loop0p1 /mnt/work/chroot/
touch /mnt/work/chroot/dev/loop0
mount --bind /dev/loop0 /mnt/work/chroot/dev/loop0
mkdir -p  /mnt/work/chroot/dev/mapper/
touch /mnt/work/chroot/dev/mapper/loop0p1
mount --bind /dev/mapper/loop0p1 /mnt/work/chroot/dev/mapper/loop0p1
mount -t proc none /mnt/work/chroot/proc
mount -t sysfs none /mnt/work/chroot/sys

chroot /mnt/work/chroot

echo “(hd0) /dev/loop0” > /boot/grub/device.map

bash-4.3# /usr/sbin/grub-install --no-floppy --grub-mkdevicemap=/boot/grub/device.map --debug /dev/loop0 

…………………

is_path_readable_by_grub /boot/grub
+ path=/boot/grub
+ test -e /boot/grub
+ :
+ /sbin/grub-probe -t fs /boot/grub
+ return 1
+ gettext_printf 'Path `%s'\'' is not readable by GRUB on boot. Installation is impossible. Aborting.\n' /boot/grub
+ gettext_printf_format='Path `%s'\'' is not readable by GRUB on boot. Installation is impossible. Aborting.\n'
+ shift
++ gettext 'Path `%s'\'' is not readable by GRUB on boot. Installation is impossible. Aborting.\n'
++ printf %s 'Path `%s'\'' is not readable by GRUB on boot. Installation is impossible. Aborting.\n'
+ printf 'Path `%s'\'' is not readable by GRUB on boot. Installation is impossible. Aborting.\n' /boot/grub
Path `/boot/grub' is not readable by GRUB on boot. Installation is impossible. Aborting.
+ exit 1


bash-4.3# /sbin/grub-probe /boot/grub/ -vvv

/sbin/grub-probe: info: opening lvm/loop0p1.

grub-core/kern/disk.c:230: Opening `lvm/loop0p1'...

grub-core/kern/disk.c:230: Opening `hd0'...

/sbin/grub-probe: info: the size of hd0 is 6291456.

grub-core/disk/diskfilter.c:135: Scanning for DISKFILTER devices on disk hd0

/sbin/grub-probe: info: Scanning for DISKFILTER devices on disk hd0.

/sbin/grub-probe: info: Scanning for mdraid1x devices on disk hd0.

grub-core/kern/emu/hostdisk.c:909: opening the device `/dev/loop0' in open_device()

grub-core/kern/emu/hostdisk.c:886: reusing open device `/dev/loop0'

grub-core/kern/emu/hostdisk.c:886: reusing open device `/dev/loop0'

/sbin/grub-probe: info: Scanning for mdraid09 devices on disk hd0.

grub-core/kern/emu/hostdisk.c:886: reusing open device `/dev/loop0'

/sbin/grub-probe: info: Scanning for mdraid09_be devices on disk hd0.

/sbin/grub-probe: info: Scanning for dmraid_nv devices on disk hd0.

grub-core/kern/emu/hostdisk.c:886: reusing open device `/dev/loop0'

/sbin/grub-probe: info: Scanning for ldm devices on disk hd0.

/sbin/grub-probe: info: scanning hd0 for LDM.

grub-core/kern/emu/hostdisk.c:886: reusing open device `/dev/loop0'

/sbin/grub-probe: info: no LDM signature found.

/sbin/grub-probe: info: Scanning for lvm devices on disk hd0.

/sbin/grub-probe: info: no LVM signature found.

grub-core/partmap/msdos.c:181: partition 0: flag 0x0, type 0x83, start 0x3f, len 0x5b85a0

grub-core/disk/diskfilter.c:135: Scanning for DISKFILTER devices on disk hd0

/sbin/grub-probe: info: Scanning for DISKFILTER devices on disk hd0.

/sbin/grub-probe: info: Scanning for mdraid1x devices on disk hd0.

grub-core/kern/emu/hostdisk.c:886: reusing open device `/dev/loop0'

grub-core/kern/emu/hostdisk.c:886: reusing open device `/dev/loop0'

/sbin/grub-probe: info: Scanning for mdraid09 devices on disk hd0.

grub-core/kern/emu/hostdisk.c:886: reusing open device `/dev/loop0'

grub-core/kern/emu/hostdisk.c:886: reusing open device `/dev/loop0'

/sbin/grub-probe: info: Scanning for mdraid09_be devices on disk hd0.

/sbin/grub-probe: info: Scanning for dmraid_nv devices on disk hd0.

/sbin/grub-probe: info: Scanning for ldm devices on disk hd0.

/sbin/grub-probe: info: scanning hd0 for LDM.

/sbin/grub-probe: info: no LDM signature found.

/sbin/grub-probe: info: Scanning for lvm devices on disk hd0.

/sbin/grub-probe: info: no LVM signature found.

grub-core/partmap/apple.c:123: bad magic (found 0x0; wanted 0x4552

grub-core/partmap/msdos.c:181: partition 1: flag 0x0, type 0x0, start 0x0, len 0x0

grub-core/partmap/msdos.c:181: partition 2: flag 0x0, type 0x0, start 0x0, len 0x0

grub-core/partmap/msdos.c:181: partition 3: flag 0x0, type 0x0, start 0x0, len 0x0

grub-core/partmap/msdos.c:181: partition 0: flag 0x0, type 0x83, start 0x3f, len 0x5b85a0

grub-core/partmap/msdos.c:181: partition 1: flag 0x0, type 0x0, start 0x0, len 0x0

grub-core/partmap/msdos.c:181: partition 2: flag 0x0, type 0x0, start 0x0, len 0x0

grub-core/partmap/msdos.c:181: partition 3: flag 0x0, type 0x0, start 0x0, len 0x0

grub-core/partmap/msdos.c:181: partition 0: flag 0x0, type 0x83, start 0x3f, len 0x5b85a0

grub-core/partmap/msdos.c:181: partition 1: flag 0x0, type 0x0, start 0x0, len 0x0

grub-core/partmap/msdos.c:181: partition 2: flag 0x0, type 0x0, start 0x0, len 0x0

grub-core/partmap/msdos.c:181: partition 3: flag 0x0, type 0x0, start 0x0, len 0x0

grub-core/partmap/apple.c:123: bad magic (found 0xeb63; wanted 0x4552

grub-core/kern/disk.c:326: Closing `hd0'.

grub-core/kern/disk.c:312: Opening `lvm/loop0p1' failed.

grub-core/kern/disk.c:326: Closing `lvm/loop0p1'.

/sbin/grub-probe: error: disk `lvm/loop0p1' not found.

bash-4.3# 



Thanks,
Divya




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