On 16/02/17 14:08, Reindl Harald wrote:

Hi

i am new and was redirected to this list from the bugtracker
please have a look at https://bugzilla.kernel.org/show_bug.cgi?id=194551

currently "writemostly" seems to be only supported on "real" RAID1 while
i was in hope that by the conecpt of RAID10 having more or less
RAID0+RAID1 it would also work on RAID10 (and on the virtual machine wre
i tested mdadm with the flag before buying the disks it did not complain)

Be careful. Don't confuse Raid10 with Raid1+0. They are NOT the same 
thing (on linux at least), although they are very similar.

Cheers,
Wol