On Wed, May 4, 2011 at 5:20 AM, <CACook@xxxxxxxxxxxxxxx> wrote: > On Tuesday 3 May, 2011 14:26:52 Fajar A. Nugraha wrote: >> Does Debian (or whatever distro you use) support BTRFS "/"? >> If yes, you should ask them. > > What do you mean 'does Debian support BTRFS'? The kernel supports it. Just because you can use something doesn't mean it's supported by the distro. For example, RHEL6 marks btrfs as "technology preview", in other words "you can use it to try out new features but don't complain if anything's broken". There should be a similar warning in Debian. In your case, the "broken" part is the integration with other distro components (e.g grub) > And why would they know more about BTRFS than you? A good distro would normally test all components included, and mark them as supported or not. If it's not supported, then you should expect lower level of funcionality or integration compared to supported components. Some signs of unsupported components: - it's marked as "technology preview" (like in RHEL6 case) - kernel supports it, but the distro installer does not let you use it by default (needs some manual setup of installer flags) - it's on a different repository (like Ubuntu's universe/multiverse) - it's not listed as supported component Sometimes when a distro includes a technology preview, they'd also include known issues, caveats, or workaround needed to make it work. In Ubuntu maverick (I suspect it's also the same in Debian) you need to manually update to newer version of grub-pc. > > My whole system is installed over BTRFS. If this is non-functional in any OS there should be a warning indicating it is non-functional. > There is, though the location and form may be distributed all over the place. There's a warning in the kernel (see Chris's post) Debian install manual (http://www.debian.org/releases/stable/amd64/ch06s03.html.en#di-partition) also doesn't list btrfs as supported partition type, in other words it's unsupported. > >> Looks like grub problem. I know that Ubuntu Natty's grub-pc (grub2) >> work just fine, so you might be able to fix it by upgrading to newer >> grub/grub-pc (perhaps from Debian-unstable). > > I would be happy to upgrade grub, but the package management system is jammed because of this. You can download grub-related packages (should be grub and grub-pc, possibly from Debian unstable) and install it manually using dpkg. You might also need to temporarily rename /usr/sbin/update-grub manually elsewhere and replace it with symlink to /bin/true, or move /etc/kernel/postinst.d/zz-update-grub out of the way (just to enable update process run correctly). -- Fajar -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
