Bug#668034: mdadm: Typo in 4b. Can a 4-disk RAID10 survive two disk failures?

[Michael Tokarev]

tags 668034 + squeeze
thanks

On 08.04.2012 16:42, Olaf van der Spek wrote:
> Package: mdadm
> Version: 3.1.4-1+8efb9d1+squeeze1
> Severity: wishlist
> 
> Hi,
> 
> FAQ.gz:
>   In two thirds of the cases, yes[0], and it does not matter which layout you
>   use. When you assemble 4 disks into a RAID10, you essentially stripe a RAID0
>   across two RAID1, so the four disks A,B,C,D become two pairs: A,B and C,D.
>   If A fails, the RAID6 can only survive if the second failing disk is either
>   C or D; If B fails, your array is dead.
> 
> RAID6 should be RAID10 in the second to last line.

This has been fixed for wheezy, see #637068.

/mjt