> The freeze/reboot/fine cycle seems to be a common one for SSDs acting poorly, running out of blocks they want to use internally, or memory or cache or somethi

> The freeze/reboot/fine cycle seems to be a common one for SSDs acting poorly, running out of blocks they want to use internally, or memory or cache or something, or just hanging in their own firmware for whatever other reason. Given that it's two gen4 drives in a laptop being subjected to a moderately heavy sustained workload, I'd also suspect a thermal problem or maybe even power delivery. Those two slots are probably being fed off the same 3.3V regulator. Since the firmware bug appears to have caused catastrophic write amplification, what may seem to the user to be only a modest and reasonable workload may be causing the drive that is the backup destination to be running at full tilt doing a ton of writes to the flash and causing the drive to hit its peak power consumption and heat output.