On 01/28/2011 08:22 PM, Hank Barta wrote:
One exception: Grub (and perhaps LILO) can boot from a RAID1 partition because the individual partition looks like a plain file system. It requires v 0.9 metadata which stores the superblock at the end of the partition. (Don't ask me how I know! ;) )
Grub2 can boot from raid1, raid0, raid5, it doesn't care ( without a plain /boot partition ).
I have used LVM to partition a RAID5. I have no idea if it adds significant overhead vs. partitioning the RAID itself if that were possible. It was arcane enough for me to not care to do it again. It appears to have some powerful capabilities that were not needed by me.
With LVM you can do online resize and moves, and don't run into issues trying to expand a partition and having to take forever to move an adjacent one over to make room, or other issues with the 4 primary partition limit. I find these to be pretty handy.
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