On Jul 28, 2008, at 11:31, Richard Michael wrote:
Hello list,
Apologies if this is a "support" question that doesn't belong on the
devel list. (I've been looking into RAID/LVM improvements in grub2
and
thought this list might be appropriate, however.)
I have a linux system with 8 disks. I would like to divide them into
groups of 4 and create 2 RAID5 arrays; then run a RAID1 array across
the
two RAID5 arrays; and finally LVM2 on top of the RAID1 array.
Why not use Raid-10 instead of this more complex setup?
Can grub2 boot such a nested configuration? If so, what special steps
must I take to install the bootloader? (I'll install the system with
grub-legacy using Fedora or another distro, then migrate to grub2.)
I played around with this myself a little bit. Currently Grub2 only
understands the RAID superblock version 0.90.
Since this only supports up to 2TB of RAIDs I actually have to
partitions on every disk. The first one is part of a RAID-1
with a 0.90 superblock. The other partition is part of a RAID-5 with a
1.0 superblock.
Nevertheless you really should think about setting up a RAID-10
instead. (+ a small /boot RAID-1 partition)
Kind regards,
Mike
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