Moshe Yudkowsky wrote:
Here's a baseline question: if I create a RAID10 array using default
settings, what do I get? I thought I was getting RAID1+0; am I really?
Maybe you are, depending on your settings, but this is beyond the point. No
matter what 1+0 you have (linux, classic, or otherwise) you can not boot from
it, as there is no way to see the underlying filesystem without the RAID layer.
With the current state of affairs (available mainstream bootloaders) the rule
is:
Block devices containing the kernel/initrd image _must_ be either:
* a regular block device (/sda1, /hda, /fd0, etc.)
* or a linux RAID 1 with the superblock at the end of the device (0.9
or 1.2)
My superblocks, by the way, are marked version 01; my metadata in
mdadm.conf asked for 1.2. I wonder what I really got.
This is how you find the actual raid version:
mdadm -D /dev/md[X] | grep Version
This will return a string of the form XX.YY.ZZ. Your superblock version is
XX.YY.
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