Linux 3.10 will allow more "--add" to be handled as "--re-add".
To be sure the tests work correctly we sometimes need to zero
the device to ensure it really is an --add that happens.
Signed-off-by: NeilBrown <neilb@suse.de>
1.1 is more flexible in a number of ways and is safer.
0.90 is still fully supported.
1.0 should possibly be used for RAID1 arrays that you
want to boot off, depending on your boot loader.
Signed-off-by: NeilBrown <neilb@suse.de>