I have an external drive (3.5" hdd, SATA) in an enclosure (usb 3) (purchased separately), connected to a thunderbolt dock (OWC) connected alternately to an iMac and a macbook pro. The HDD goes to sleep, and causes problems. Freezes, weird internet access problems, kernel panics.

I have done some research, and can't seem to figure out:

how to know whether it is the drive, enclosure, or computer causing the sleep, although, fiddling with various settings on the mac seemed to have no effect, although it may have increased my battery usage :(

how to adjust settings on the drive, or in the enclosure.

How to determine what the sleep behavior of prospective drives will be.

As a workaround, I tried to write a zsh script to touch the drive ever few seconds. This kinda worked, but was a struggle to figure out appropriate permissions issues and how to make it run automatically.

I welcome all guidance, pointers to resources, clarifications, incantations, well-wishes.

I have a CalDigit TS3+ dock that I switch between my M1 Macbook Pro and a System76 Galago Pro that's currently running Windows 10 (I'm sorry, FOSS gods). The M1 has no problem using the TS3+ when it's connected or disconnected and reconnected. But the Galago Pro will only connect to the dock if it was connected while booting up. Disconnecting and reconnecting leaves the dock in a state where only the pass-through thunderbolt port works. So my monitor that uses the pass-through for DisplayPort can operate after reconnecting the dock, but no other devices plugged into the dock will. My mouse/keyboard for example don't even receive power in this state.

Oddly when setting up the drivers for thunderbolt I found that the only drivers available are for Intel's NUCs. IIRC someone on reddit said that this is actually the software I need to install, so that's what I did.

Any help getting the dock to work better is appreciated! Currently I need to reboot the laptop every time I switch back from the M1 to the Galago Pro.