Hi,

Small correction:

- mdadm -G -l 0 -n 3 /dev/md3

Regards,
Alexander

On Wed, Sep 2, 2015 at 11:57 AM, Alexander Afonyashin
[off-list ref] wrote:

Hi,

I added 3rd drive to 2-disk raid0 (with some issues like mdadm hung
and all disks became spares) but now it looks like:

md3 : active raid4 sda4[0] sdc4[3] sdb4[1]
      1304305152 blocks super 1.2 level 4, 512k chunk, algorithm 5 [4/3] [UUU_]

(/dev/sdc4 was added). I wonder what should be better to convert raid4
back to raid0 again:
- mdadm -G -l 0 -n 0 /dev/md3
or
- echo 0 > /sys/block/md3/md/level

Which command doesn't start 'sync' process again? (I suspect that
first one does)

Regards,
Alexander Afonyashin