BUG: 6.6.1 Spindown disabled but drives still spin down

Hi

I had spindown enabled for a while on my Pro6 on 6.6.1 and then disabled it:

[17/02/03 22:42:02 WET] info:system:LOGMSG_SPINDOWN_DISABLE Automatic disk spin-down disabled.

But there are still spindown events...

-- Reboot --
Feb 04 20:16:04 Pro6 noflushd[3063]: Enabling spindown for disk 1 [sda,0:0:HGST_HDN726060ALE614:NCGTBD3T:APGNW7JH:7200]
Feb 04 20:16:04 Pro6 noflushd[3063]: Enabling spindown for disk 2 [sdb,0:1:ST6000DM001-1YW11C:ZA13X2QA:DN02:7200]
Feb 04 20:16:04 Pro6 noflushd[3063]: Enabling spindown for disk 3 [sdc,0:2:ST4000DM000-1F2168:Z301A5LT:CC54:5900]
Feb 04 20:16:04 Pro6 noflushd[3063]: Enabling spindown for disk 4 [sdd,0:3:ST4000DM000-1F2168:Z301A6NQ:CC54:5900]
Feb 04 20:16:04 Pro6 noflushd[3063]: Enabling spindown for disk 5 [sde,0:4:HGST_HDN726060ALE610:NCG9UA9S:APGNT517:7200]
Feb 04 20:16:04 Pro6 noflushd[3063]: Enabling spindown for disk 6 [sdf,0:5:HGST_HDN726060ALE610:NCG9TPDS:APGNT517:7200]
Feb 04 20:21:29 Pro6 noflushd[3063]: Spinning down disk 1 (/dev/sda).
Feb 04 20:21:32 Pro6 noflushd[3063]: Spinning down disk 6 (/dev/sdf).
Feb 04 20:21:40 Pro6 noflushd[3063]: Spinning up disk 1 (/dev/sda) after 0:00:08.
Feb 04 20:21:40 Pro6 noflushd[3063]: Spinning up disk 6 (/dev/sdf) after 0:00:05.
Feb 04 20:24:00 Pro6 noflushd[3063]: Spinning down disk 2 (/dev/sdb).
Feb 04 20:24:09 Pro6 noflushd[3063]: Spinning down disk 3 (/dev/sdc).
Feb 04 20:24:11 Pro6 noflushd[3063]: Spinning down disk 5 (/dev/sde).
Feb 04 20:26:44 Pro6 noflushd[3063]: Spinning down disk 1 (/dev/sda).
Feb 04 20:26:47 Pro6 noflushd[3063]: Spinning down disk 6 (/dev/sdf).
Feb 04 20:29:00 Pro6 noflushd[3063]: Spinning down disk 4 (/dev/sdd).
Feb 04 20:31:07 Pro6 noflushd[3063]: Spinning up disk 4 (/dev/sdd) after 0:02:05.
Feb 04 20:36:22 Pro6 noflushd[3063]: Spinning down disk 4 (/dev/sdd).
Feb 04 20:50:25 Pro6 noflushd[3063]: Spinning up disk 3 (/dev/sdc) after 0:26:14.
Feb 04 20:50:25 Pro6 noflushd[3063]: Spinning up disk 4 (/dev/sdd) after 0:14:00.
Feb 04 20:50:40 Pro6 noflushd[3063]: Spinning up disk 2 (/dev/sdb) after 0:26:36.
Feb 04 20:50:50 Pro6 noflushd[3063]: Spinning up disk 1 (/dev/sda) after 0:24:03.
Feb 04 20:51:00 Pro6 noflushd[3063]: Spinning up disk 5 (/dev/sde) after 0:26:46.
Feb 04 20:51:15 Pro6 noflushd[3063]: Spinning up disk 6 (/dev/sdf) after 0:24:25.

Any idea how to disable it now??
Thanks

Andy