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Re: Software RAID and Fakeraid
From: |
Lennart Sorensen |
Subject: |
Re: Software RAID and Fakeraid |
Date: |
Tue, 1 Feb 2011 11:26:42 -0500 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Mon, Jan 31, 2011 at 08:31:38PM -0500, Phillip Susi wrote:
> What do you mean help?
If the raid stores the raid info at the end, then the data starts at
sector 0. So no space for a bootloader at all.
> It is left empty afaik, which is the whole point of shifting it over to 4kb.
Certainly makes sense. Now is 4K enough for a boot loader? Not sure.
> Obviously doing nothing is the simplest thing one can do. Instead I
> would like to do something and end up with a better, more functional
> system. Hence my suggestion on WHAT to do and the existence of this
> entire thread.
I personally consider soft raid on raw devices so convluted that I
have never done it. I would rather have something I know works with my
bootloader and other tools, than gain that extra 1MB (at most) that not
having partitions gives. Also given many PCs won't boot from a drive
without a partition table, it isn't even an option then.
Really I think it comes down to only being able to handle the case
where there is a 4K gap, if you can fit grub in there in a format that
a system would be able to boot reading just sector 0 of the device.
The raid info at the start and raid info at the end both prevent you
from having any boot code in sector 0 so can't be supported at all.
--
Len Sorensen