P33M

Does disabling LPM on the device make a difference? From lsusb find the vid:pid pair for the device, for example: ``` $ lsusb Bus 002 Device 003: ID 05e3:0743 Genesys...

Does an explicit unmount of the target filesystem before reboot prevent corruption from happening? What happens if you mount the fat32 partition with "-o flush" and do the test?

I'm using your second test script on a fresh (apt updated) Bullseye install. It's on a 2GB Pi 4 but that shouldn't matter. I'm using an SSD with a standard...

Please post the output of `mount`.

I can get corruption of the sort you describe to varying degrees of brokeneness if the adapter I am using has a known interop issue with UAS. The adapter can...

I can run your script dozens of times (with UAS quirk applied) without a broken filesystem happening. Whatever the issue is, it must be down to your hardware. Booting from...

There is a bug here. I swapped to using a mass-storage-only drive caddy, but on a default install it still didn't register corruption. I noticed that you are using the...

Do these applications ever encounter hard memory constraints in realistic scenarios (i.e. OOM-kills) without KSM enabled?

Please post the full output of `sudo lsusb -v`.

What happens if you connect one of the devices with a usb3.0 extension lead, or repeat the test with one or both devices plugged into a usb3.0 hub instead?