Re: In this partition scheme, grub does not find md information?

[Peter Rabbitson <rabbit+list@rabbit.us>]

Michael Tokarev wrote:

> With 5-drive linux raid10:
> 
>    A  B  C  D  E
>    0  0  1  1  2
>    2  3  3  4  4
>    5  5  6  6  7
>    7  8  8  9  9
>   10 10 11 11 12
>    ...
> 
> A&B can't be removed - 0, 5.  A&C CAN be removed, as
> are A&D.  But not A&E - losing 2 and 7.  And so on.

I stand corrected by Michael, this is indeed the case with the current state 
of md raid 10. Either my observations were incorrect when I made them a year 
and a half ago, or some fixes went into the kernel since then.

In any way - linux md10 does behave exactly as a classic raid 1+0 when created 
with -n D -p nS where D and S are both even and D = 2S.