I do and did this with all my previous phones. Unfortunately, it comes with so many obstacles nowadays like non-working banking apps, that I’m unsure how the future of custom roms looks like. If I need to buy a new phone, I’ll pick one with good custom rom support and a cheap second one just for the banking stuff.

I miss /r/opensuse and an active Java community. There are a few Java communities on several servers, but they are all basically dead.

Did reformat the drive recently to ext4? there’s a background process running that’s doing deferred stuff which keeps the drive busy. try to unmount the drive to ensure it’s idle.

Checkout smartctl. You can either force shutdown immediately or after some idle time. Command is something like this:

smartctl -n -s standby,VALUE /dev/sda with value either “now” or something between 0 and 255. From the manpage:

Values from 1 to 240 specify timeouts from 5 seconds to 20 minutes in 5 second increments. Values from 241 to 251 specify timeouts from 30 minutes to 330 minutes in 30 minute increments. Value 252 specifies 21 minutes. Value 253 specifies a vendor specific time between 8 and 12 hours. Value 255 specifies 21 minutes and 15 seconds.