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jancici
Apprentice
Joined: 27 Jan 2004
Posts: 284
Location: Slovakia
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 Posted: Thu Dec 23, 2010 1:36 pm Post subject: BTRFS as root filesystem |
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I did replace HDD in my laptop. I decide to reinstall gentoo instead of just copy from old HDD.
I also decide to reorganize partition more simply.
I want to put btrfs to roor filesystem.
a)
as first step was install to temporary partition - reiserfs
I can boot new gentoo on this partition
kernel has reiserfs and btrfs in it
b)
format new root parition as btrfs
copy all data from temporary partition to new btrfs parition
c)
change fstab and grub to point to correct root partition
during booting I am geting this message
kernel panic - not syncing VFS; unable to mount root fs on unknown-block (8,5)
this is in my grub
| Code: | title 2.6.37
root (hd0,1)
kernel /boot/kernel-2.6.37-rc5 root=/dev/sda5 video=1280x800-24@60
title 2.6.36
root (hd0,1)
kernel /boot/kernel-2.6.36-gentoo-r5 root=/dev/sda6 video=1280x800-24@60 |
SDA5 is new btrfs partition
SDA6 is temporary reiserfs partition
this is fstab on SDA5
| Code: | ...
/dev/sda2 /boot ext2 noatime 1 2
/dev/sda5 / btrfs noatime 0 1
... |
and this is fstab on SDA6
| Code: | ...
/dev/sda2 /boot ext2 noatime 1 2
/dev/sda6 / reiserfs noatime 0 1
... |
trying to google but no solution
please, what is the problem, do I making error samewhere?
thanks for any help / tip |
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Voltago
Advocate
Joined: 02 Sep 2003
Posts: 2593
Location: userland
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| Posted: Thu Dec 23, 2010 2:22 pm Post subject: |
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| Quote: | | kernel has reiserfs and btrfs in it |
Did you compile btrfs support into the kernel, rather than build it as a module? |
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jancici
Apprentice
Joined: 27 Jan 2004
Posts: 284
Location: Slovakia
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| Posted: Thu Dec 23, 2010 2:25 pm Post subject: |
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| yes, it is in kernel |
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ToeiRei
Veteran
Joined: 03 Jan 2005
Posts: 1191
Location: Austria
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| Posted: Mon Dec 27, 2010 7:12 am Post subject: |
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you might want to add a bootparameter here to indicate which subvolume to use. (example: real_rootflags=subvol=rootfs)
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jancici
Apprentice
Joined: 27 Jan 2004
Posts: 284
Location: Slovakia
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| Posted: Mon Dec 27, 2010 9:07 am Post subject: |
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well, I solve this.
I did mount new partition, and did chroot to it
then I did reinstall grub
after this trick it is working well ...
thanks for reply |
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Installing Gentoo
