How to silence the DiskStation 207+ (or 209)

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Why this article?

This is a supplemental page to the the article How to silence the CubeStation. As we are talking about a hardware MOD, so this article applies to both the DS207 and the DS207+ at the same time, they are both built from the same case.

If you are interested to read, what other things to consider when silencing your DiskStation, pls refer to the above article here.

Specifics of the Diskstation

The DiskStation DS20X is not only smaller than the CubeStation, but has even more significant differences to the CubeStation that need particular attention when silencing the system:

  • two harddrives - disadvantage to one drive (warmer), advantage to four drives (less cooling needed)
  • a plastic case - no passive heat dissipation to the outside
  • a smaller fan - faster and louder than 80mm or 120mm
  • 60x60x15mm for the ds207
  • 70x70x25mm for the ds209
  • max. 15mm depth fan to be used inside the 207 - alternative: mount a slower, but deeper fan on the outside
  • very few available fans measure 70x70mm, making it hard to find a good substitute for the 209
  • a minimum speed setting for the fan - you either use a medium fast fan, min. 2.000+ rpm, or you hack the firmware
  • limited overall space

For these reasons, you need to be extra careful not to obstruct the airflow in the case when trying to silence the device.


  • Silent fan, e.g. PAPST 612F/2L, 60x60x15, 2.650rpm, 19m³/h, 16dB(A), sintec
 Another fan that works well is the "Yateloon D60SM" available from eBay
  • For ds209, a quieter fan might be hard to find, see below for more comments.
  • Rubber anti-vibe mat for 60 mm fans
  • Textile adhesive tape
  • Noise breaking material, self-adhesive (bitumen, bitumen foam or heavy foil)

foam max. 12 mm, heavy foil/bitumen max. 2 mm.


  • Paper cutter
  • stable scissors
  • stable ruler
  • soldering iron
  • insulating tape
  • screwdriver (to open the case)
  • rubber band
  • soft pad (to work on, and to protect the soft surface of the plastic case)

Alternative: instead of soldering, you can use insulating screw joints, or 'luster terminals'. Note: If you are using bitumen, this will sure spoil your cutters. Prepare a small bottle of turpentine to clean the cutters after work. Works great!

Note on the ds209

This case is basically the same as the ds207, with the important difference of the fan being larger. This is essential as 60x60mm fan is far more common than the 70x70mm model. The modding described below will work as describe also for the ds209, with the other fan of course.

I have personally tried the Nexus real silent 70mm fan, basic series. However this fan was louder than the fan pre-mounted one! Other options include the Accoustifan model, which sells at double the price. Delapaco

Noise breaking material

Purpose of usage

The heavy foil / bitumen will reduce the noise transmitted by the disks and the fan via the body of the DS case. As a result, it will help reduce the vibrations of the lighter parts of the case. The foam will additionally absorb much of the noise transmitted from both disks and fan via the air inside of the DS case.

Applying the material

Most likely, the foil will come in a package of pre-cut slices. Make sure it is self-adhesive, else it may become too thick to apply on the tight parts of the case.

You can use any foam up to 12mm in total thickness, you just need to fit the slizes into the top, bottom and some of the front parts of the DS207 case. (note: top/bottom/front in reference to the DiskStation when standing).

Cut the foam and the heavy foil to cover all parts as depicted below. If you are not sure if the parts fit in your case due to different thickness, do not stick them fully, but adjust them loosely with temporary glue (or cut-out small parts of the wax paper covering the self-adhesive area). Only remove the entire wax paper from the back of the foil after you are certain that you can fully close the entire case, including screws. - Do a test assembly first before you finally attach the foil to the case.

DS207 MOD foam in the case.jpg

Use the thinner parts of the heavy foil for the side parts of the case. Note: you will need to cut out a 'circular' shape from the side-foils, as there is a kind of 'bump' in the side parts. In case you do not to this, the harddisks would touch the heavy foil, and directly transmit any vibrations to the case. That would be the opposite of 'decoupling', so pls avoid it.

The result should look something like this:

DS207 MOD foam in the case2.jpg

Changing the fan

Note: The fan must have a speed signal, thus 3 wires are required. The minimum speed of the fan should be well above 2.000 rpm (the average production tolerance of high quality fans is 5-10%, so with this model you are on the safe side). If not, the internal alarm will go on/off as the fan drops below the 2.000 rpm threshold.

Once you open the case and the disks, you may find that the original fan connector has different dimensions than your new fan's connector (in my case, the PAPST fan had a connector that was too big to fit onto the tiny, three-pinned socket on the motherboard). In the unexpected case that your new, silent fan's does fit into the original plug, consider yourself lucky - and let me know (you may have found a perfect solution for anyone trying to follow this instruction).

NOTE: by hint from 'El Loco' to a solution in the Dutch Synology Forum, it seems that you can remove the plastic socket, leaving three naked pins on the mainboard. These should be the same format as the original Papst fan's connector, so you could possibly AVOID CUTTING AND SOLDERING the cables. Try out - and let others know here...!

Note: I tried this and for me it worked: I removed the entire socket and connected directly to the three naked pins (with a "Yateloon D60SM" fan).

Note2: I have tried this for the ds209, and it works very nicely. Just a sharp knife blade at the very bottom of the socket and you can slowly ply it loose, then pull gently with a set of pliers. The socket isn't glued or fastened in any way other than a snug fit. Delapaco

Original fan plug on mainboard

Adapting the fan's cable

First, unplug and unmount the original fan. Then, you will need to cut the cable of both the old and the new fan. Cut it right in the middle, then remove apprx. 2 cm of the insulation on all 3+3 cable ends. Use a very fine paper cutter, be careful not to cut through too many cords of each cable. Then, using either the soldering iron or the screw joints, connect the cords as below, so that you end up connecting the same cords from left to right as in the below image.

   * white on white,
   * ret on red,
   * blue on black 

Connect the cables and isolate the properly

To change the fan, you simply unplug the fan from the motherboard, unscrew it from the back of the (metal) parts of the case, and mount the new silent fan. - NOTE: in the below image, you will see the new fan mounted outside of the Synology case. This allows for a better air-stream that additionally reduces noise of the the DS-207+.

If you are using a PAPST silent fan, the mounting screws may not fit - the holes will be too small. You either force them into the small holes of the fan, or you use a small file to widen the screw holes.

Finally, isolate the connection parts to avoid short circuits in the system once you reconnect to power.

Before mounting the new fan with the screws, apply the 60 mm anti-vibe pad between the fan and the case.

Wrap the surplus cable around the fan and tie it to the fan with a rubber band. To avoid unnecessary vibrations, don't let any parts of the cord dangle on any part of the case or mainboard.


Before you finally start operating your Diskstation after the MOD, do a test-run. Check, if no parts are in contact with the disks, the fan, etc. Check the temperature over at least 90 mins, including a 'stress test', where you copy multiple files back and forth, or do a re-indexing of your media. Watch the temperature, it should not exceed the normal levels as indicated by your HDD manufacturer. Else, you will need to buy a faster fan. But this is just to be on the safe side, not really an issue to expect.


As you can see on the images provided in this article, the MOD worked fine for me in the below configuration:

  • 2 x Seagate ES.2 ST3500320NS
  • RAID 1
  • Papst 612F/2L
  • Cooltek bitumen noise breaking pads

However, note that

  • following any of the above alterations, in particular removing original parts from the system, may cause the warranty to become void;
  • the author(s) of this article will not take any responsibility for damages caused by following this article;
  • after accepting points 1 + 2, here comes point 3: good luck to make a great little gadget even better,

- enjoy your DiskStation !

Peace, papi!