Seeking (yet another) recommendation for low-power solution to fit 2 new 3.5" WD Red 4TB HDD

  • This is the power supply I used and this is the cable I used, two of them, actually. Cut the large (female) end off of one of the cables and solder the two yellow wires into one and the two black wires into one. The yellow lead attaches to the “+” (first) terminal and the black lead attaches to the “-“ (third) terminal of your power supply. Don’t be confused by the red lead at the bottom. It supplies power to a fan. You will also need a three-wire pigtail wired to the three left-most terminals of the power supply for power. You only get one try to get the connections right. Wire it wrong and you have a paperweight.

    Easy data backup: In a Scheduled Job: rsync -av --delete /srv/dev-disk-by-label-SOURCE/ /srv/dev-disk-by-label-DESTINATION/ (HT: Getting Started with OMV5)
    OMV 5 (current) - Thinkserver TS140, Nextcloud, Plex, Airsonic, Navidrome, Ubooquity, Digikam, Wetty, & Heimdall - NanoPi M4 (v.1): backups using Rsync and Rsnapshot - Odroid XU4 (Using DietPi): PiHole - hc2, xu4, Pi 3B+, Odroid H2, and VirtualBox: Testing and playing - Mac user converting to Linux, Debian 10 KDE.

  • ekent I looked at your link and I believe the molex plug would work but you would need to

    1. Try the plug for fit before wiring it up.
    2. Note which pins on the M4 are + and -. There are tiny markings on the bottom side of the board where the socket is soldered in indicating which is which. Make sure you solder the positives and negatives together properly. Remember, you only get one chance to get it right.

    One thing I like about my cable is I can disconnect power at the middle plug and not place any undue wear and tear and stress at the board. If you go with the plug you found and could find a little push-button switch to solder into the cable, that would be even better. I never found a (lighted) switch that suited my taste.

    Easy data backup: In a Scheduled Job: rsync -av --delete /srv/dev-disk-by-label-SOURCE/ /srv/dev-disk-by-label-DESTINATION/ (HT: Getting Started with OMV5)
    OMV 5 (current) - Thinkserver TS140, Nextcloud, Plex, Airsonic, Navidrome, Ubooquity, Digikam, Wetty, & Heimdall - NanoPi M4 (v.1): backups using Rsync and Rsnapshot - Odroid XU4 (Using DietPi): PiHole - hc2, xu4, Pi 3B+, Odroid H2, and VirtualBox: Testing and playing - Mac user converting to Linux, Debian 10 KDE.

  • This is the power supply I used and this is the cable I used, two of them, actually. Cut the large (female) end off of one of the cables and solder the two yellow wires into one and the two black wires into one. The yellow lead attaches to the “+” (first) terminal and the black lead attaches to the “-“ (third) terminal of your power supply. Don’t be confused by the red lead at the bottom. It supplies power to a fan. You will also need a three-wire pigtail wired to the three left-most terminals of the power supply for power. You only get one try to get the connections right. Wire it wrong and you have a paperweight.

    Legend! Thank you so much. I have been able to find the same Molex Power cable you used in the Amazon Australia store, so I'll just get a couple of those like what you did. I really like how you setup yours so that you can disconnect the power without putting stress and wear and tear on the HAT power connection.


    Can I ask another couple questions?

    1. You mentioned that you have a fan connected to the same Power supply. Is this a fan for cooling the HDDs in your rack? Do I take it that because it's connected straight to the power supply it's always on and running at the same speed?
    2. Some reading i've done on the Armbian forum and another blog have indicated that there can be some issues with the CPU governor and CPU frequencies on RK3399 see below. Have you had any issues with these, or implemented the changes to the CPU governor and frequencies as they discuss?


    Thanks again

    1. Yes. The rack came with a fan so I just plugged it to the power supply. Not elegant, I know
    2. The only problem I encountered was when I scheduled a Rsync to coincide with early morning Plex scheduled maintenance. I rescheduled my Rsync to a different time and all works well.

    Easy data backup: In a Scheduled Job: rsync -av --delete /srv/dev-disk-by-label-SOURCE/ /srv/dev-disk-by-label-DESTINATION/ (HT: Getting Started with OMV5)
    OMV 5 (current) - Thinkserver TS140, Nextcloud, Plex, Airsonic, Navidrome, Ubooquity, Digikam, Wetty, & Heimdall - NanoPi M4 (v.1): backups using Rsync and Rsnapshot - Odroid XU4 (Using DietPi): PiHole - hc2, xu4, Pi 3B+, Odroid H2, and VirtualBox: Testing and playing - Mac user converting to Linux, Debian 10 KDE.

  • The rack came with a fan so I just plugged it to the power supply. Not elegant, I know

    It sounds like your solution is simple and effect! Sounds pretty elegant to me.

    I'm seriously thinking of going with a NanoPi M4 and getting a HDD cage similar to what you got. Unfortunately I couldn't find the Roseville cage that you had a link to somewhere. But this seems pretty similar (not sure of what quality you get from AliExpress though)
    https://www.aliexpress.com/ite…CSrsQAvD_BwE&gclsrc=aw.ds

  • That rack looks just like what I have except with a fan inside the black housing. I have bought a few items from Aliexpress with no regrets.


    Any 120mm 12V computer fan will work fine.

    Easy data backup: In a Scheduled Job: rsync -av --delete /srv/dev-disk-by-label-SOURCE/ /srv/dev-disk-by-label-DESTINATION/ (HT: Getting Started with OMV5)
    OMV 5 (current) - Thinkserver TS140, Nextcloud, Plex, Airsonic, Navidrome, Ubooquity, Digikam, Wetty, & Heimdall - NanoPi M4 (v.1): backups using Rsync and Rsnapshot - Odroid XU4 (Using DietPi): PiHole - hc2, xu4, Pi 3B+, Odroid H2, and VirtualBox: Testing and playing - Mac user converting to Linux, Debian 10 KDE.

  • Agricola I found in this thread that you were contemplating using a copper shim between the main board and the aluminium heatsink. Did you end up going this route? If so what size and thickness worked for you?

    Also did you end up going with a copper shim between the SATA HAT and it's heatsink? If so what size and thickness did you use there?


    Thanks :)

  • This is what I bought but the link shows it currently unavailable. I think I used the 1mm thickness. I compared it with the thickness of the supplied “thermal” adhesive do-dad and picked what I thought was the same thickness.

    Easy data backup: In a Scheduled Job: rsync -av --delete /srv/dev-disk-by-label-SOURCE/ /srv/dev-disk-by-label-DESTINATION/ (HT: Getting Started with OMV5)
    OMV 5 (current) - Thinkserver TS140, Nextcloud, Plex, Airsonic, Navidrome, Ubooquity, Digikam, Wetty, & Heimdall - NanoPi M4 (v.1): backups using Rsync and Rsnapshot - Odroid XU4 (Using DietPi): PiHole - hc2, xu4, Pi 3B+, Odroid H2, and VirtualBox: Testing and playing - Mac user converting to Linux, Debian 10 KDE.

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