| View previous topic :: View next topic |
| Author |
Message |
Moonboots
Apprentice
Joined: 02 Dec 2006
Posts: 164
|
 Posted: Sat Feb 07, 2009 6:36 am Post subject: Booting from ext4 - possible ? |
 |
|
Normally Gentoo on ppc doesn't require a separate boot partition with yaboot , for file system ext3,reiser etc. Is this true for ext4 ?
Fedora 10 ppc using ext4 for / insists on creating a boot partition. |
|
| Back to top |
|
 |
JoseJX
Retired Dev
Joined: 28 Apr 2002
Posts: 2774
|
|
| Back to top |
|
|
harvester
Tux's lil' helper
Joined: 21 Jan 2006
Posts: 123
|
| Posted: Sat Feb 07, 2009 9:29 pm Post subject: |
|
|
huh ?
i dont have a seperate boot partition but i think i just upgraded to ext4 from ext3 without a boot partition..
i think its working.. i dont use a ppc tho.. silly acer laptop. |
|
| Back to top |
|
|
JoseJX
Retired Dev
Joined: 28 Apr 2002
Posts: 2774
|
| Posted: Sat Feb 07, 2009 9:38 pm Post subject: |
|
|
If you didn't convert to use ext4's extents, then ext4 is backwards compatible with ext3. If you don't you do lose much of what makes ext4 interesting though.
I have no knowledge of what filesystems grub (or whatever bootloader you're using) can boot from.
_________________
Gentoo PPC FAQ: http://www.gentoo.org/doc/en/gentoo-ppc-faq.xml |
|
| Back to top |
|
|
Massimo B.
Veteran
Joined: 09 Feb 2005
Posts: 1821
Location: PB, Germany
|
| Posted: Tue Dec 15, 2009 9:45 am Post subject: |
|
|
I got my PPC booting from ext4. Therefore I needed a separate /boot partition /dev/hda7:
| mac-fdisk -l: | # mac-fdisk -l
/dev/hda
# type name length base ( size ) system
/dev/hda1 Apple_partition_map Apple 63 @ 1 ( 31.5k) Partition map
/dev/hda2 Apple_Bootstrap bootstrap 1600 @ 64 (800.0k) NewWorld bootblock
/dev/hda3 Apple_UNIX_SVR2 swap 2928024 @ 1664 ( 1.4G) Linux swap
/dev/hda4 Apple_UNIX_SVR2 root 31457280 @ 3073664 ( 15.0G) Linux native
/dev/hda5 Apple_UNIX_SVR2 home 269557384 @ 34530944 (128.5G) Linux native
/dev/hda6 Apple_HFS Apple_HFS_Untitled_2 8493464 @ 304088328 ( 4.0G) HFS
/dev/hda7 Apple_UNIX_SVR2 boot 143976 @ 2929688 ( 70.3M) Linux native
/dev/hda8 Apple_Free Extra 16 @ 312581792 ( 8.0k) Free space
Block size=512, Number of Blocks=312581808
DeviceType=0x0, DeviceId=0x0 |
| mount: | # mount | grep hda
/dev/hda4 on / type ext4 (rw,noatime,nodiratime,data=writeback)
/dev/hda7 on /boot type ext3 (rw,noatime,commit=0)
/dev/hda5 on /home/massimo type crypt (data=ordered) |
The additional boot partition I split from /dev/hda3 which is swap (see 6097348). Remeber to adapt your /etc/fstab afterwards.
| yaboot.conf: | # zgrep -v "#" /etc/yaboot.conf
fgcolor=light-purple
boot=/dev/hda2
device=hd:
timeout=20
install=/usr/lib/yaboot/yaboot
magicboot=/usr/lib/yaboot/ofboot
partition=7
root=/dev/hda4
macosx=/dev/hda6
default=wlan-banet
image=/boot/kernel
label=wlan-banet
read-only
append="video=radeonfb:1440x960-32 splash=verbose,fadein,kdgraphics,theme:livecd-2007.0 quiet fbcon=scrollback:128K CONSOLE=/dev/tty1 softlevel=wlan-banet"
initrd=/boot/fbsplash |
Now the only issue is, that I get following line in the boot process right after yaboot:
| Code: | # dmesg | grep "optional feature"
EXT3-fs: hda4: couldn't mount because of unsupported optional features (240). |
What's wrong with the yaboot.conf? Is that normal that yaboot complains about /dev/hda4 but mounts it anyway after kernel with ext4 support has been loaded?
Anyway the system boot is working like that.
_________________
HP ZBook Power 15.6" G8 i7-11800H|HP EliteDesk 800G1 i7-4790|HP Compaq Pro 6300 i7-3770 |
|
| Back to top |
|
|
depontius
Advocate
Joined: 05 May 2004
Posts: 3525
|
| Posted: Tue Dec 15, 2009 12:59 pm Post subject: |
|
|
I believe that grub-2 can read from (and therefore boot) an ext4 partition - don't know about any version of lilo.
Unless you're trying to do away with a separate boot partition altogether, it's small enough and generally left unmounted, I just use ext2 for boot.
_________________
.sigs waste space and bandwidth |
|
| Back to top |
|
|
Randy Andy
Veteran
Joined: 19 Jun 2007
Posts: 1152
Location: /dev/koelsch
|
| Posted: Tue Dec 15, 2009 2:44 pm Post subject: ext4 for Boot Partition with Grub Legacy works! |
|
|
Hi Folks,
Grub Legacy (the first Grub, not the new Grub2) can boot from ext4 since version 0.97-r9 (~since end of 2008, implemented patch from googles Summer of code as far as i know)
Here you can get some information it.
https://bugs.gentoo.org/show_bug.cgi?id=250829
Since ext4 has been declared as stable, i use it for all my hard disks on 4 different PC's, including boot partition.
Grub2 can boot from ext4 too.
I don't know the features of yaboot - sorry.
Greetings, Andy.
_________________
If you want to see a Distro done right, compile it yourself! |
|
| Back to top |
|
|
JoseJX
Retired Dev
Joined: 28 Apr 2002
Posts: 2774
|
| Posted: Wed Jan 06, 2010 1:45 pm Post subject: |
|
|
Okay, people who don't have PowerPC machines should check what they're suggesting is applicable to PowerPC before posting. :p (Especially for booting!)
In any case, a separate boot partition is required on PowerPC for use with yaboot. Massimo, it looks like you forgot to update your fstab to reflect the filesystem change.
As for grub, grub legacy does not work on PowerPC. Grub2 can boot ext4, but I haven't personally tried it on PowerPC. lilo is completely irrelevant on PowerPC.
_________________
Gentoo PPC FAQ: http://www.gentoo.org/doc/en/gentoo-ppc-faq.xml |
|
| Back to top |
|
|
Massimo B.
Veteran
Joined: 09 Feb 2005
Posts: 1821
Location: PB, Germany
|
| Posted: Thu Dec 06, 2012 9:36 am Post subject: |
|
|
Currently re-partitioning my PowerBook and reading the ppc-handbook again... There should be mentioned that yaboot doesn't know ext4, and that for this case a separate boot partition is needed, since ext4 might be the default and recommended FS of today.
_________________
HP ZBook Power 15.6" G8 i7-11800H|HP EliteDesk 800G1 i7-4790|HP Compaq Pro 6300 i7-3770 |
|
| Back to top |
|
|
cjubon
Guru
Joined: 03 Jul 2007
Posts: 450
Location: Vienna/Europe
|
| Posted: Thu Feb 21, 2013 3:28 pm Post subject: |
|
|
| JoseJX wrote: | | In any case, a separate boot partition is required on PowerPC for use with yaboot. |
I set up a brand new gentoo system on a Powerbook G4 recently, and there was no need for a separate /boot partition. Yaboot just boots fine from an ext4 root partition. The current version of the Gentoo PPC handbook is fully correct on this.
Of course, you have to compile in ext4 support into your kernel (not as a module, unless you're using an initrd)  .
_________________
Mandrake Dec 2001 · Debian "Woody" Aug 2002 · Gentoo Jan 2004 · Funtoo Oct 2009 |
|
| Back to top |
|
|
|
Gentoo on PPC
