Re: Installing Wheezy on btrfs only (multi-device)
On Fri, May 4, 2012 at 7:24 PM, Steven Post
<redalert.commander@gmail.com> wrote:
>
> I'm testing out a new system, the idea is to combine 6 hard drives into
> a single btrfs volume (raid10) (using subvolumes for /, /home, etc). I
> understand that it is now possible to also have /boot on btrfs
> (previously impossible because of GRUB).
>
> Unfortunately the Debian installer (daily build for wheezy) is unable to
> create multi-device btrfs volumes.
>
> I tried the a normal install and then copy it over to a multi-device
> btrfs system, afterwards adding the remaining disk:
> 1) using a single drive to install using ext4 for /boot and btrfs for /
> 2) after (successful) installation boot from a live cd (ubuntu 12.04 in
> this case, but it shouldn't really matter)
> 3) create partitions for btrfs on the other 5 drives using gdisk
> 4) create a multi-device btrfs filesystem with those partitions, with a
> subvolume for the root filesystem and for /home
> 5) copy all the data from the first disk to the new btrfs volume
> 6) chroot into the rootfs of the new volume, after mounting (-o
> bind) /dev, /proc and /sys into the mounted system
> 7) change fstab for the new drives and modify /etc/default/grub
> 8) run update-grub: this is where things start falling down, I get an
> error about / not being mounted so grub fails.
>
> This is apparently caused by a regression in GRUB [1] (Debian bug
> #538118).
>
> Has anyone attempted such an install before? How should I proceed with
> this?
>
> [1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=538118
I don't think that this bug corresponds to your problem because you're
bind-mounting "/dev".
Does grub-probe work inside the chroot?
grub-probe --target=abstraction /
grub-probe --target=drive /
grub-probe --target=fs /
grub-probe --target=fs_uuid /
grub-probe --target=partmap /
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