Disk spin-down problem, RN104, fw 6.2.0

After researching and lose some time, I've gotten the spindown of the disks work for me.

Explain what my problems and as I resolved, maybe someone will help.

I apologize for my English, I'll use a translator and what little is.

After checking the logs created with

 echo 1> / proc / sys / vm / block_dump 

I saw that mdadm constantly working on SDA2 and SDC1 partitions, which does not work spindown.

Reviewing "mdstat.log" I saw that "md0" did not have the partition "sdc1" and that "md1" did not have the partition "sda2. The reason I do not know but had clear that this was not right for how the NAS.

nused devices: <none>
/dev/md/0:
        Version : 1.2
  Creation Time : Fri Dec 12 23:01:27 2014
     Raid Level : raid1
     Array Size : 4190208 (4.00 GiB 4.29 GB)
  Used Dev Size : 4190208 (4.00 GiB 4.29 GB)
   Raid Devices : 3
  Total Devices : 3
    Persistence : Superblock is persistent

    Update Time : Fri Dec 26 21:23:12 2014
          State : clean 
 Active Devices : 3
Working Devices : 3
 Failed Devices : 0
  Spare Devices : 0

           Name : 0e361548:0  (local to host 0e361548)
           UUID : 49a8e5ae:bd76be6f:4afd44b6:12b6b985
         Events : 993

    Number   Major   Minor   RaidDevice State
       0       8       49        0      active sync   /dev/sdd1
       1       8       17        1      active sync   /dev/sdb1
       3       8        1        2      active sync   /dev/sda1
/dev/md/1:
        Version : 1.2
  Creation Time : Wed Dec 17 00:11:37 2014
     Raid Level : raid1
     Array Size : 523712 (511.52 MiB 536.28 MB)
  Used Dev Size : 523712 (511.52 MiB 536.28 MB)
   Raid Devices : 3
  Total Devices : 3
    Persistence : Superblock is persistent

    Update Time : Fri Dec 26 20:34:35 2014
          State : clean 
 Active Devices : 3
Working Devices : 3
 Failed Devices : 0
  Spare Devices : 0

           Name : 0e361548:1  (local to host 0e361548)
           UUID : 32018819:4936abb9:daf4b9cd:1dfe33a6
         Events : 20

    Number   Major   Minor   RaidDevice State
       0       8       18        0      active sync   /dev/sdb2
       1       8       34        1      active sync   /dev/sdc2
       2       8       50        2      active sync   /dev/sdd2

What I did was add each partition to its corresponding RAID. This process let these partitions in "spare" but now spindown works well and I do not want to try more. Is that you can add this disc to --grown option but I'll leave it like that.

/dev/md/0:
        Version : 1.2
  Creation Time : Fri Dec 12 23:01:27 2014
     Raid Level : raid1
     Array Size : 4190208 (4.00 GiB 4.29 GB)
  Used Dev Size : 4190208 (4.00 GiB 4.29 GB)
   Raid Devices : 3
  Total Devices : 4
    Persistence : Superblock is persistent

    Update Time : Fri Dec 26 22:46:11 2014
          State : clean 
 Active Devices : 3
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 1

           Name : 0e361548:0  (local to host 0e361548)
           UUID : 49a8e5ae:bd76be6f:4afd44b6:12b6b985
         Events : 996

    Number   Major   Minor   RaidDevice State
       0       8       49        0      active sync   /dev/sdd1
       1       8       17        1      active sync   /dev/sdb1
       3       8        1        2      active sync   /dev/sda1

       4       8       33        -      spare   /dev/sdc1
/dev/md/1:
        Version : 1.2
  Creation Time : Wed Dec 17 00:11:37 2014
     Raid Level : raid1
     Array Size : 523712 (511.52 MiB 536.28 MB)
  Used Dev Size : 523712 (511.52 MiB 536.28 MB)
   Raid Devices : 3
  Total Devices : 4
    Persistence : Superblock is persistent

    Update Time : Fri Dec 26 22:46:06 2014
          State : clean 
 Active Devices : 3
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 1

           Name : 0e361548:1  (local to host 0e361548)
           UUID : 32018819:4936abb9:daf4b9cd:1dfe33a6
         Events : 22

    Number   Major   Minor   RaidDevice State
       0       8       18        0      active sync   /dev/sdb2
       1       8       34        1      active sync   /dev/sdc2
       2       8       50        2      active sync   /dev/sdd2

       3       8        2        -      spare   /dev/sda2

All this I have done no data backup (on my own responsibility and knowing the danger of losing data) but I have no space for backup. :-) My data are not vital but better not lose them and I will not attempt to remove the "spare".

Now I've gone from a consumption of 40W to 13W when not use the NAS.
Now if I have full satisfaction with this product, it was what I needed.