D. Hugh Redelmeier via talk wrote on 2025-03-04 17:33:
After a certain amount of thrashing about, I discover that
- a Seagate USB <-> SATA system has/had bugs switching between "UAS" mode and plain old USB Mass Storage mode
- UAS mode is faster for disk operations, so the kernel blocks USB Mass Storage mode on Seagate external drives.
- SMARTmon Tools needs USB Mass Storage to deal with this drive
To get out of this corner, read: <https://www.smartmontools.org/wiki/SAT-with-UAS-Linux> <https://blog.karssen.org/2022/05/19/getting-smart-information-from-a- seagate-expansion-portable-drive/>
The key thing is to:
I don't know if I missed the December message, but there's some good reading in those links (nicely summarized in email). Seems like quite a PITA to get smartmon data on some USB devices. I'm hoping that I can find your post in my archive should the time come I encounter this issue first-hand. Like the war stories, thanks for writing 'em up.