--- Em sáb, 1/12/12, Sagar Padhye escreveu:
> De: Sagar Padhye
> Assunto: [lfs-support] Not able to boot LFS : ext4 partition
> Para: lfs-support
> Data: Sábado, 1 de Dezembro de 2012, 9:06
> This is my first attempt to set up a
> LFS. I have used Version
> SVN-20121122 for this. I have just finished the book with
> the given
> instructions except following two.
> 1. Instead of preparing my LFS partition to be ext2
> or ext3, I chose
> it to be ext4.
> 2. I didnt install LFS grub, instead I have updated
> grub of my host
> system (ubuntu 12.10).
>
> My HDD now looks like :
> $ sudo fdisk -l /dev/sda
> Device Boot Start End Blocks Id System
> /dev/sda1 2048 51199999 25598976 83
> Linux #LFS / ext4
> /dev/sda2 * 51200000 51589119 194560 83
> Linux #Ubuntu /boot ext3
> /dev/sda3 51589120 56276991 2343936 82 Linux swap /
> Solaris
> /dev/sda4 56279038 312580095 128150529 5 Extended
> /dev/sda5 56279040 116824063 30272512 83
> Linux #Ubuntu / ext4
> /dev/sda6 116826112 312580095 97876992 83
> Linux #Shared /home ext4
>
>
> Part of my LFS kernel config looks like :
> CONFIG_EXT3_FS=y
> # CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
> CONFIG_EXT3_FS_XATTR=y
> CONFIG_EXT3_FS_POSIX_ACL=y
> CONFIG_EXT3_FS_SECURITY=y
> CONFIG_EXT4_FS=m
> CONFIG_EXT4_USE_FOR_EXT23=y
> CONFIG_EXT4_FS_XATTR=y
> # CONFIG_EXT4_FS_POSIX_ACL is not set
> # CONFIG_EXT4_FS_SECURITY is not set
> # CONFIG_EXT4_DEBUG is not set
> # CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
>
> The EXT4 is compiled as kernel module.
>
> The grub meny entry in ubuntu grub looks like :
You seem to have forgotten to paste the entry.
It seems that William Harrington have already the right answer, but as I
was sepending some time to write this, I will post it, perhaps it will
help aomeone in the future, or perhaps someone will help me in improving
what I am doing.
I usually do the following (I assume that you are running Ubuntu):
1. I have the directory /boot/grub/old (mkdir -vp /boot/grub/old) in
Ubuntu's partition.
2. cd /boot/grub/
3. Before upgrading Ubuntu's or LFS kernel, make a backup copy of that
good grub.cfg: cp -vau grub.cfg old/grub.cfg-before-`date +%Y.%m.%d`
4. After the kernel upgrade, make a new backup copy: cp -vau grub.cfg
old/grub.cfg-after-`date +%Y.%m.%d`
5. Edit grub.cfg and replace the entry for LFS by (replace <kernel
version> by the kernel used in LFS):
menuentry "GNU/Linux, with Linux <kernel version> (on /dev/sda1)" --class
gnu-linux --class gnu --class os {
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set=root <partition UUID>
linux /boot/vmlinuz-<kernel version> root=/dev/sda1 ro
(the search line is not useful for LFS, as have been told by the
editors, I keep just to remember the form If anytime I change LFS's
boot procedures)
6. Just in case and for future eventual use, backup the good one: cp
-vau grub.cfg old/grub.cfg-good-`date +%Y.%m.%d`
I also make similar replacement for the "recovery mode" entry.
After doing that many times, I decided a more automatic way of doing
things.
I edited in Ubuntu the file /etc/grub.d/40_custom and
pasted the good entries for LFS after "# the 'exec tail' line above.":
# Start LFS<version>
the lines for LFS
# End LFS<version>
Instead of doing step 4 above:
5a. When there is a kernel upgrade in Ubuntu I just delete the
automatically generated part corresponding to LFS.
5b. When I upgrade the kernel in LFS, I replace the LFS entry versions
by the new version number, in grub.cfg and in /etc/grub.d/40_custom.
> When I try to go into LFS, it (I am not sure what do I mean
> by 'it' -
> grub / kernel :P) goes into panic state.
>
> The points I could extract from error messages is, Somehow
> system is
> trying to attempt and mount the '/' partition (/dev/sda1) as
> ext3 which
> is incorrect.
>
> Anyways I took a snap of my error screen when I try to boot
> LFS and kept
> it at
> http://ubuntuone.com/3bLEHLy31YuLisa87A6AFB
> and
> https://picasaweb.google.com/lh/photo/E7NQ3tPJSxmb7Jq9moYlE9MTjNZETYmyPJy0liipFm0?feat=directlink
[]s,
Fernando
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