On Sun, 2012-05-06 at 22:30 +0900, Osamu Aoki wrote: [...] > > > > > Unfortunately the Debian installer (daily build for wheezy) is unable to > > > > create multi-device btrfs volumes. > > > > > > Yah.. but you probably can do this via shell screen. > > > > I don't think I'm able to do that from the rescue mode shell without > > using an existing installation, without the existing installation I get > > a 'Command not found' error on 'btrfs device scan', I assume this > > includes the whole btrfs command. > > It is easiest to do it using an existing installation.
Another attempt, mixed success. I created the btrfs filesystem using the ubuntu live cd (2 subvolumes, 1 for the root fs, 1 for /home, and set rootfs as the default subvolume), then started the Debian installation again from the daily netinstall iso. Although the btrfs command isn't available from a shell, the btrfsctl command is, so I was able to issue a "btrfsctl -a" command, equivalent to btrfs device scan. Then in the partitioner I can select a single partition that is part of the btrfs file system and mark it to be used as the root fs /. The Debian-installer will then correctly mount the btrfs file system (all 6 drives) and use it to install. The installer only fails to install the grub bootloader, I think because it cannot detect the multi-device btrfs file system. I then opted for skipping installing a bootloader, figuring I could do it afterwards in rescue mode. Installer finishes up without any further problems. Installing grub from rescue mode (after manually issuing a btrfsctl -a command again) using the array as root fails with 'grub-install /dev/sda' telling me "Auto-detection of a filesystem of /dev/sda2 failed." Every disk has 2 partitions, a 20 MB BIOS boot partition (I thought this might be needed because of the use of GPT partitions, not sure), the rest is allocated to a partition used for the btrfs filesystem. Currently I'm stuck there. I'll have a look at it again tomorrow. > > Well... I see btrfs-tools-udeb package. If you install via expermode, > you may be able to chose to install btrfs-tools-udeb via menu. > Otherwise, install such packages via wget and dpkg to rescue system > provided you have enough memory btrfs-tools-udeb isn't available from the expert install, it is loaded anyway as part of the partitioner. [...] > > I think with skill and knowledge you presented, if you are successful > doing this with help of shell etc., you should present specific > procedure needed to do this to d-i BTS as wishlist bug. That should get > it supported smoothly for upcoming release. Good idea. > > > Kind regards, > > Steven > > Osamu >
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