Keeping tradition with doing things backwards, I’ve finally got a UPS for the rack (mounted in the bottom of the stack). Got a PowerWalker VI 2200R. Its a 2U unit which is all the space I’ve got left in the rack. Decent price and decent I/O with USB, serial and a slot-in for network expansion + 4 IEC outputs. Its powering everything in the rack and connected via USB to my main server which runs a NUT server that other machines can connect to. A calibration run (100-80%) puts the runtime at about 20 min. Long enough that I’m comfortable setting things to shut down when 20% capacity remains. Summary, I sleep better now.

The rack with the UPS at the bottom

NUT output

  • glimse@lemmy.worldEnglish
    2·
    8 months ago

    Back when I built racks, our “standard” was UPS at the bottom, all drives at the top…but mainly for accessibility. Hadn’t even thought about vibrations or interference!

    • poVoq@slrpnk.netEnglish
      4·
      8 months ago

      Ups at the bottom is also because of the weight of the batteries. In a small rack like this I don’t think moving the disks 30cm up will make a big difference.

      • glimse@lemmy.worldEnglish
        2·
        8 months ago

        Absolutely on that point. Same goes for heavy multi zone amplifiers.

        Man I loved building racks. Almost makes me miss field work…

    • catloaf@lemm.eeEnglish
      2·
      8 months ago

      Drives at the top? Hell no. SANs are heavy, they go in the bottom half too (assuming a mixed rack). Especially if you have those disk shelves that slide out so they hold 3.5" drives three deep. Top of the rack is for network hardware and such.

      • glimse@lemmy.worldEnglish
        11·
        8 months ago

        I did not install SANs, I built racks for AV so the only drives were NAS/mini PCs on shelves