On: WD Passport 4TB drives don't support WRITE SAME command

[progval]

I also recently tried a bunch of USB3+SCSI - SATA adapters from Amazon, and only found a single one that supported passing TRIM through. And that's after a firmware upgrade that can only (afaik) be done using an installer running on ARM+Linux and provided by a third-party. Truly amazing.

[throwaway3neu94 → progval]

How can I check that for my adapter?

[progval → throwaway3neu94]

Either mount the drive and run "fstrim" on the drive's location (it will error without TRIM support) or https://unix.stackexchange.com/a/339684/21419

[vetinari → progval]

You need to check your adapters for UASP support.

In addition to devices, the host controller has to support UASP too - in early days of USB3, it was separately licensed option.

[progval → vetinari]

All the adapters I tried claimed UASP support.