Re: raid1 or raid10 for /boot

["Keld Jørn Simonsen" <keld@dkuug.dk>]

On Mon, Feb 04, 2008 at 09:17:35AM +0000, Robin Hill wrote:
> On Mon Feb 04, 2008 at 07:34:54AM +0100, Keld Jørn Simonsen wrote:
> 
> > I understand that lilo and grub only can boot partitions that look like
> > a normal single-drive partition. And then I understand that a plain
> > raid10 has a layout which is equivalent to raid1. Can such a raid10
> > partition be used with grub or lilo for booting?
> > And would there be any advantages in this, for example better disk
> > utilization in the raid10 driver compared with raid?
> > 
> A plain RAID-10 does _not_ have a layout equivalent to RAID-1 and
> _cannot_ be used for booting (well, possibly a 2-disk RAID-10 could -
> I'm not sure how that'd be layed out).  RAID-10 uses striping as well as
> mirroring, and the striping breaks both grub and lilo (and, AFAIK, every
> other boot manager currently out there).

Yes, it is understood that raid10,f2 uses striping, but a raid10,near=2,
far=1 does not use striping, anfd this is what you get if you just make
a    mdadm --create /dev/md0 -l 10 -n 2 /dev/sda1 /dev/sdb1

best regards
keld
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