Arch won't boot after switching to ext4

LTSmash · 2009-01-18 18:57:53

Hi,

Yesteday I converted my partition to ext4 sucesfully, and I managed to boot once after that, but when I tried to reboot, GRUB2 would say:

error: invalid magic number

while trying to load the kernel. I already chrooted from my Ubuntu partition and tried to fix by reinstalling kernel and fsck'ing, but no luck. ideas? I can't even boot from fallback :S

skottish · 2009-01-18 20:37:34

I searched around for your error, and I found references to people basically having things named in a way the grub2 doesn't like. Maybe posting your grug.cfg file would help?

Pierre · 2009-01-18 20:57:25

Last time I checked grub2 was not able to handle the extents of ext4. But grub from [core] does.

skottish · 2009-01-18 21:13:26

Pierre wrote:

Last time I checked grub2 was not able to handle the extents of ext4. But grub from [core] does.

I'm using grub2 and converted my file systems using the tune2fs lines listed here:

http://wiki.archlinux.org/index.php/Cre … t3_to_ext4

Unless I'm missing something, it works fine.

LTSmash · 2009-01-19 19:24:21

Ok, here's my grub.cfg

# Config file for GRUB2 - The GNU GRand Unified Bootloader
# /boot/grub/grub.cfg

# DEVICE NAME CONVERSIONS
#
#  Linux           Grub
# -------------------------
#  /dev/fd0        (fd0)
#  /dev/sda        (hd0)
#  /dev/sdb2       (hd1,2)
#  /dev/sda3       (hd0,3)
#

# Timeout for menu
set timeout=5

# Set default boot entry as Entry 0
set default=0

#Colors
set menu_color_normal=light-blue/black
set menu_color_highlight=light-cyan/blue

#modules insert
insmod linux

# (0) Arch Linux
menuentry "Arch Linux" {
set root=(hd0,5)
linux /boot/vmlinuz26 root=/dev/sda5 rootfstype=ext4 ro quiet
initrd /boot/kernel26.img
}

# (1) Arch Linux recovery
menuentry "Arch Linux Fallback" {
set root=(hd0,5)
linux /boot/vmlinuz26 root=/dev/sda5 ro quiet
initrd /boot/kernel26-fallback.img
}

menuentry  "Kubuntu 8.10, kernel 2.6.27-7-generic" {
set root=(hd1,5)
linux /boot/vmlinuz-2.6.28-4-generic root=/dev/sdb5 ro quiet splash
initrd /boot/initrd.img-2.6.28-4-generic
}

menuentry  "Kubuntu 8.10, kernel 2.6.27-7-generic (recovery)" {
set root=(hd1,5)
linux /boot/vmlinuz-2.6.28-4-generic root=/dev/hda1 ro single
initrd /boot/initrd.img-2.6.28-4-generic
}

## (1) Windows
#menuentry "Windows" {
#set root=(hd0,3)
#chainloader +1
#}

BTW, if I change "linux" command for "multiboot", I get this:

alloc magic is broken at 0x19710

Any ideas on what may be causing this? Perhaps changing to GRUB-legacy would help?

skottish · 2009-01-19 19:32:33

I don't know much about this stuff, but I do know that this works. Obviously it's a very vanilla grub2 config. Hopefully this will help:

# Timeout for menu
set timeout=5

# Set default boot entry as Entry 0
set default=0

# (0) Arch Linux
menuentry "Arch Linux" {
set root=(hd0,1)
linux /vmlinuz26 root=/dev/sda3 ro
initrd /kernel26.img
}

# (1) Arch Linux
menuentry "Fallback" {
set root=(hd0,1)
linux /vmlinuz26 root=/dev/sda3 ro
initrd /kernel26-fallback.img
}

LTSmash · 2009-01-19 19:50:02

skottish wrote:

I don't know much about this stuff, but I do know that this works. Obviously it's a very vanilla grub2 config. Hopefully this will help:

# Timeout for menu
set timeout=5

# Set default boot entry as Entry 0
set default=0

# (0) Arch Linux
menuentry "Arch Linux" {
set root=(hd0,1)
linux /vmlinuz26 root=/dev/sda3 ro
initrd /kernel26.img
}

# (1) Arch Linux
menuentry "Fallback" {
set root=(hd0,1)
linux /vmlinuz26 root=/dev/sda3 ro
initrd /kernel26-fallback.img
}

And what should I do with this? I don't get it :S

skottish · 2009-01-19 19:57:59

I believe that this line was only necessary for ext4-dev:

rootfstype=ext4

I don't know if will have any effect, but as I mentioned before about sites that I ran into, it seems that little things like this may break grub2.

LTSmash · 2009-01-19 20:03:16

skottish wrote:

I believe that this line was only necessary for ext4-dev:
rootfstype=ext4
I don't know if will have any effect, but as I mentioned before about sites that I ran into, it seems that little things like this may break grub2.

Not really, since the error will show up also if I only execute:

multiboot /boot/vmlinuz26

I investigated a little bit on this, but couldn't find anything else than this
:
http://www.nabble.com/Bug-462835:-grub- … 22694.html

Perhaps I should report a bug upstream and try installing GRUB-Legacy as a workaround could help?
However this will be tough, since none of my Arch LiveCD's have yet the latest kernel, and because of that I can't install GRUB... hmm, any ideas on this?

skottish · 2009-01-19 20:38:46

You should be able to chroot into your current system through an Arch livecd and run pacman from there. If you don't have web access during that time, I would grab a copy of grub (legacy) and store it where you have access. I've never done this, so I don't know how.

I wish I was more helpful.

LTSmash · 2009-01-20 00:05:14

skottish wrote:

You should be able to chroot into your current system through an Arch livecd and run pacman from there.

Do older Arch LiveCD's support Ext4dev? If they don't, then I guess I could try by installing GRUB-Legacy to my Ubuntu partition, and then fixing from Arch, will try. Hopefully GRUB is the problem.

skottish · 2009-01-20 00:37:36

LTSmash wrote:

skottish wrote:
You should be able to chroot into your current system through an Arch livecd and run pacman from there.
Do older Arch LiveCD's support Ext4dev? If they don't, then I guess I could try by installing GRUB-Legacy to my Ubuntu partition, and then fixing from Arch, will try. Hopefully GRUB is the problem.

All that I know of is here. Of course you'll have to download yet another ISO.

http://bbs.archlinux.org/viewtopic.php?id=60385

LTSmash · 2009-01-20 03:49:43

skottish wrote:

LTSmash wrote:
skottish wrote:
You should be able to chroot into your current system through an Arch livecd and run pacman from there.
Do older Arch LiveCD's support Ext4dev? If they don't, then I guess I could try by installing GRUB-Legacy to my Ubuntu partition, and then fixing from Arch, will try. Hopefully GRUB is the problem.
All that I know of is here. Of course you'll have to download yet another ISO.
http://bbs.archlinux.org/viewtopic.php?id=60385

Hmm, I already downloaded Godane's Live Arch CD

I'll try to fix my system with that...

LTSmash · 2009-01-20 22:33:40

Wohooo... fixed

Just installed GRUB package from jaunty to my Ubuntu partition, and grub-install'd from there...

Darn, I won't be using GRUB2 in a while again :S

Arch Linux

#1 2009-01-18 18:57:53

Arch won't boot after switching to ext4

#2 2009-01-18 20:37:34

Re: Arch won't boot after switching to ext4

#3 2009-01-18 20:57:25

Re: Arch won't boot after switching to ext4

#4 2009-01-18 21:13:26

Re: Arch won't boot after switching to ext4

#5 2009-01-19 19:24:21

Re: Arch won't boot after switching to ext4

#6 2009-01-19 19:32:33

Re: Arch won't boot after switching to ext4

#7 2009-01-19 19:50:02

Re: Arch won't boot after switching to ext4

#8 2009-01-19 19:57:59

Re: Arch won't boot after switching to ext4

#9 2009-01-19 20:03:16

Re: Arch won't boot after switching to ext4

#10 2009-01-19 20:38:46

Re: Arch won't boot after switching to ext4

#11 2009-01-20 00:05:14

Re: Arch won't boot after switching to ext4

#12 2009-01-20 00:37:36

Re: Arch won't boot after switching to ext4

#13 2009-01-20 03:49:43

Re: Arch won't boot after switching to ext4

#14 2009-01-20 22:33:40

Re: Arch won't boot after switching to ext4

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