Kahel OS Forum Tag: grub2

Kahel OS Forum Tag: grub2 - Recent Posts http://forum.kahelos.org/tags/grub2 Open for Change en-US Thu, 29 Jul 2010 20:47:21 +0000 http://bbpress.org/?v=1.0.1 <![CDATA[Search]]> q http://forum.kahelos.org/search.php Fenrin on "now...just KERNEL PANIC! ..." http://forum.kahelos.org/topic/nowjust-kernel-panic#post-645 Fri, 08 Jan 2010 22:49:52 +0000 Fenrin 645@http://forum.kahelos.org/ I guess you would have to reinstall KahelOS with a seperate boot partition. Ext2 is a safe choice for the boot partition with >=256MB size. At the installation of KahelOS you could install your grub on the /boot partition (dont install it to hda, if you want to keep grub2 of Debian). so, if you would use following partition setup... hda1-> debian hda2 -> swap hda3 -> /boot [ext2] hda4 -> kahel[btrfs] hda5 -> /home both of the following entries should work to boot KahelOS: menuentry 'Arch(on /dev/hda4)' { set root=(hd0,3) linux /boot/vmlinuz26 root=/dev/hda4 } menuentry "KahelOS" { set root=(hd0,3) chainloader +1 } The second menu entry would open the grub of your KahelOS. Im really not sure about this solution. You can also use grub legacy like joelbryan suggested. I dont use Grub2 either. joelbryan on "now...just KERNEL PANIC! ..." http://forum.kahelos.org/topic/nowjust-kernel-panic#post-644 Fri, 08 Jan 2010 22:44:24 +0000 joelbryan 644@http://forum.kahelos.org/ <blockquote>Im not sure if the current status page of Grub2 is up to date, but according to it BTRFS and NILFS is not a supported filesystem. So if its not supported yet, you will atleast need a /boot partition with a supported filesystem. Maybe even the root filesystem has to be a supported one, I dont know. Current status page of grub2: <a href="http://grub.enbug.org/CurrentStatus" rel="nofollow">http://grub.enbug.org/CurrentStatus</a> </blockquote> I don't see any benefits of using Grub2 over Grub, only headaches, IMHO. Grub2 can't boot those filesystems while Grub1 can perfectly do it without any complications. Grub2 does not properly detect a separate /boot partition properly and won't install on them properly. Grub2 add things that doesn't really matter because you only need to boot your system, nothing more... Do you really need to play Tetris on your MBR bootloader? I don't really see the point of switching to grub2. hermit on "now...just KERNEL PANIC! ..." http://forum.kahelos.org/topic/nowjust-kernel-panic#post-643 Fri, 08 Jan 2010 21:52:55 +0000 hermit 643@http://forum.kahelos.org/ hi folks! well...how can i fix it? got kahelOS light and can't enter...what would the correct grub2's configuration to get in? Fenrin on "now...just KERNEL PANIC! ..." http://forum.kahelos.org/topic/nowjust-kernel-panic#post-642 Fri, 08 Jan 2010 21:35:45 +0000 Fenrin 642@http://forum.kahelos.org/ I asked at their IRC channel for clarification: <a href="http://grub.enbug.org/IrcChannels" rel="nofollow">http://grub.enbug.org/IrcChannels</a> <Fenrin> Hello, im just wondering if BTRFS is supported by grub2 or not yet? I know its not in the current status list... <Fenrin> maybe anyone can help? <fezie> no it's not <Fenrin> ok <Fenrin> does this mean that only boot has to be a supported filesystem or root too? <Fenrin> thanks <fezie> grub-mkconfig doestn't work even if just / and not /boot is btrfs <Fenrin> ok thanks <fezie> but except of that it doestn't matter if /boot is some supported fs and / btrfs <Fenrin> ok good to know Fenrin on "now...just KERNEL PANIC! ..." http://forum.kahelos.org/topic/nowjust-kernel-panic#post-640 Fri, 08 Jan 2010 21:10:38 +0000 Fenrin 640@http://forum.kahelos.org/ Im not sure if the current status page of Grub2 is up to date, but according to it BTRFS and NILFS is not a supported filesystem. So if its not supported yet, you will atleast need a /boot partition with a supported filesystem. Maybe even the root filesystem has to be a supported one, I dont know. Current status page of grub2: <a href="http://grub.enbug.org/CurrentStatus" rel="nofollow">http://grub.enbug.org/CurrentStatus</a> fplolz on "now...just KERNEL PANIC! ..." http://forum.kahelos.org/topic/nowjust-kernel-panic#post-630 Fri, 08 Jan 2010 16:12:20 +0000 fplolz 630@http://forum.kahelos.org/ hm...shouldnt be much of a problem .... well..theoretically..since home is just a place where you keep your files... though your home might be excessively big interms of size ... KenWeiLL on "now...just KERNEL PANIC! ..." http://forum.kahelos.org/topic/nowjust-kernel-panic#post-629 Fri, 08 Jan 2010 15:12:07 +0000 KenWeiLL 629@http://forum.kahelos.org/ is that really safe? debian and kahel uses one /home ? swap would be fine, but /home is used by debian and kahel hermit on "now...just KERNEL PANIC! ..." http://forum.kahelos.org/topic/nowjust-kernel-panic#post-628 Fri, 08 Jan 2010 12:07:21 +0000 hermit 628@http://forum.kahelos.org/ /boot/grub/grub.cfg : ###BEGIN /etc/grub.d/30_os-prober ### menuentry 'Arch(on /dev/hda3)' { set root=(hd0,3) linux /boot/vmlinuz26 root=/dev/hda3 } grub2 shows me debian and arch then enter to arch then ==> black screen ==> error: unknown filesystem press any key to continue... --------------------------------------------------------------------------------------------------------------- fdisk -l: <a href="http://i46.tinypic.com/23le6e.png" rel="nofollow">http://i46.tinypic.com/23le6e.png</a> where hda1-> debian hda2 -> swap hda3 -> kahel[btrfs] hda4 -> /home hermit on "now...just KERNEL PANIC! ..." http://forum.kahelos.org/topic/nowjust-kernel-panic#post-627 Fri, 08 Jan 2010 10:10:54 +0000 hermit 627@http://forum.kahelos.org/ i could read something about that fs is in 'read only'... i'm going to give the last chance right now to kahel... joelbryan on "now...just KERNEL PANIC! ..." http://forum.kahelos.org/topic/nowjust-kernel-panic#post-623 Fri, 08 Jan 2010 08:41:35 +0000 joelbryan 623@http://forum.kahelos.org/ Have you modify your "HOOKS" in your /etc/mkinitcpio.conf as you said in your previous posts? Do not modify it unless you _really_ know what your doing. Also, are you sure your grub config is valid and correct? you should at least know how path and references works, and it should not trying to load an invalid file and block device. Could you post your /boot/grub/grub.cfg as well as your modifications in /etc/rc.conf and /etc/mkinitcpio.conf? Also, could you post your partition numbers and hard drives and where Debian and Kahel OS is installed and what partition your grub MBR is installed? hermit on "now...just KERNEL PANIC! ..." http://forum.kahelos.org/topic/nowjust-kernel-panic#post-622 Fri, 08 Jan 2010 02:57:09 +0000 hermit 622@http://forum.kahelos.org/ what's wrong with KahelOS 'light ed'? what i'm doing bad than ain't install? i'm getting sick of problems... joelbryan on "error: unknown filesystem on debian's grub2[kahelOS]..." http://forum.kahelos.org/topic/error-unknown-filesystem-on-debians-grub2kahelos#post-594 Wed, 06 Jan 2010 10:51:32 +0000 joelbryan 594@http://forum.kahelos.org/ see <a href="http://forum.kahelos.org/topic/how-to-add-rootfstypebtrfs" rel="nofollow">http://forum.kahelos.org/topic/how-to-add-rootfstypebtrfs</a> hermit on "error: unknown filesystem on debian's grub2[kahelOS]..." http://forum.kahelos.org/topic/error-unknown-filesystem-on-debians-grub2kahelos#post-589 Tue, 05 Jan 2010 20:58:04 +0000 hermit 589@http://forum.kahelos.org/ may somebody teach me how to specify/to add rootfstype=btrfs to kernel line? hermit on "error: unknown filesystem on debian's grub2[kahelOS]..." http://forum.kahelos.org/topic/error-unknown-filesystem-on-debians-grub2kahelos#post-573 Tue, 05 Jan 2010 02:11:44 +0000 hermit 573@http://forum.kahelos.org/ <blockquote>You have to specify rootfstype=btrfs in your kernel line </blockquote> can u teach me how? joelbryan on "error: unknown filesystem on debian's grub2[kahelOS]..." http://forum.kahelos.org/topic/error-unknown-filesystem-on-debians-grub2kahelos#post-550 Mon, 04 Jan 2010 04:22:47 +0000 joelbryan 550@http://forum.kahelos.org/ You have to specify rootfstype=btrfs in your kernel line. If your using an SSD, BTRFS and NILFS2 are the best filesystems to use, and has a better and faster performance than ext3. Fenrin on "error: unknown filesystem on debian's grub2[kahelOS]..." http://forum.kahelos.org/topic/error-unknown-filesystem-on-debians-grub2kahelos#post-547 Mon, 04 Jan 2010 01:53:53 +0000 Fenrin 547@http://forum.kahelos.org/ yeah I guess its the same thing for NILFS. Phoronix compared the speed of NILFS2, ext3, ext4, BTRFS here: <a href="http://www.phoronix.com/scan.php?page=article&item=ext4_btrfs_nilfs2&num=1" rel="nofollow">http://www.phoronix.com/scan.php?page=article&item=ext4_btrfs_nilfs2&num=1</a> NILFS2 was in some tests much slower than other filesystems. I dont know if there is any difference between NIFLS2 and NILFS. hermit on "error: unknown filesystem on debian's grub2[kahelOS]..." http://forum.kahelos.org/topic/error-unknown-filesystem-on-debians-grub2kahelos#post-545 Mon, 04 Jan 2010 01:20:40 +0000 hermit 545@http://forum.kahelos.org/ thanks bro! and what about NILFS...same thing? Fenrin on "error: unknown filesystem on debian's grub2[kahelOS]..." http://forum.kahelos.org/topic/error-unknown-filesystem-on-debians-grub2kahelos#post-544 Mon, 04 Jan 2010 00:47:13 +0000 Fenrin 544@http://forum.kahelos.org/ I found a bug report about this. Grub2 has problems to boot a linux system, which has a btrfs root partition even if it has a seperated boot partition. <a href="https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/450260" rel="nofollow">https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/450260</a> Its probably still better to use ext3 or ext4 for the root partition. If you wanna use BTRFS later when it is ready to use, you can convert your ext3 filesystem to btrfs with btrfs-tools installed and the command "btrfs-convert /dev/sda%" hermit on "error: unknown filesystem on debian's grub2[kahelOS]..." http://forum.kahelos.org/topic/error-unknown-filesystem-on-debians-grub2kahelos#post-541 Sun, 03 Jan 2010 23:07:54 +0000 hermit 541@http://forum.kahelos.org/ it is BTRFS ready to work? is there a specialist that know about this situation? hermit on "error: unknown filesystem on debian's grub2[kahelOS]..." http://forum.kahelos.org/topic/error-unknown-filesystem-on-debians-grub2kahelos#post-535 Sun, 03 Jan 2010 11:23:04 +0000 hermit 535@http://forum.kahelos.org/ hi folks! got kahelOS 'light ed' on hd. debian's grub2 recognize it but when choose arch shows: error: unknown filesystem...i installed btrfs on partitioning...any idea how to start kahel? update-grub says --> found arch on /dev/hda3 /usr/sbin/grub-probe:error: unknown filesystem done