On 03/05/2013 05:58 AM, SilverTip257 wrote:
Veering slightly from your original question... I recently set up softraid arrays by hand before invoking the Anaconda installer (on a 6.3 install). Recent mdadm packages that ship with CentOS support metadata 1.1 and 1.2 (... actually defaulting to 1.2 I believe), but GRUB 0.97 only supports metadata 1.0 and not the metadata version that mdadm defaulted to. On my CentOS 5 installs in the past I've specifically set --metadata=0.90 to avert any catastrophes like this.
As far as I know, GRUB 0.97 only supports metadata 0.90, as does LILO. Anaconda will create arrays with 0.90 metadata for this reason.
The kernel wiki disagrees with me: https://raid.wiki.kernel.org/index.php/RAID_superblock_formats
Debian's documentation indicates that only grub 1.98+20100720-1 or later will boot from a RAID volume with a newer metadata format: http://www.debian.org/releases/stable/i386/release-notes/ch-information.en.h...