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.

Is there a good smartwatch/simile that monitors sleep and has excellent battery life (measured in weeks not hours)?

I use the Withings (ex-Nokia) Steel HR, but it … kinda sucks. The bluetooth pairings very often lose sleep data, it's very inaccurate, the reporting sucks for non-24s, and the leather bracelet is of very poor quality, keeps breaking.

I really don't care for the fitness/step tracking which, as someone else here put it, thinks typing on a keyboard or eating is a step.

I also briefly tried an Oura (https://ouraring.com/), but I never got it to work and had to send it back.

I also don't care much for any of those "sleep quality" trackers that try to detect if I snore and what not. I can do sleep studies in my own time, I just want to have accurate stats on whether and when I am asleep.