"--wait" will return non-zero status if it didn't need to wait.
This is no a reason to fail a test.
So ignore the return status from those commands.
Signed-off-by: NeilBrown <neilb@suse.de>
Some ddf tests scripts assume that /dev/sda is always present.
That's wrong e.g. on VMs. Use a more general approach.
Signed-off-by: NeilBrown <neilb@suse.de>
This is one more unit test for failure/recovery, this time with
double redundancy, which isn't covered by the other tests.
Signed-off-by: NeilBrown <neilb@suse.de>