On 17/08/2011 15:00, Asdo wrote:
On 08/17/11 15:43, John Robinson wrote:
The first sector of a md RAID with metadata 1.0 is in its data area,
so there's no way md is writing to this area itself, it's almost
certainly the filesystem that's writing it.
I think installing grub on a md partition is a bad idea. You can use
metadata 1.2 to have the first 4K left free, but grub may write its
stage 1.5 code to the first 31.5K of a device (whole drive or partition).
No you are confusing it with metadata 1.1 .
Metadata 1.0 has the data at the end like 0.9 .
No I'm afraid it's you that's confused. Metadata 1.0 has the *metadata*
at the end, like 0.9, so it has the data i.e. filesystem area at the
beginning. Take a look with mdadm -D, the data offset is zero.
This is why partitions with 0.9 or 1.0 metadata in RAID-1 can be used
individually to boot from because the partitions look identical to ones
that just have filesystems on them.
Cheers,
John.
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