The problem is deep in the Linux kernel and has been there for the entire 15+ years I've been using Linux, first Debian and for the last 10 years, Ubuntu and then Mate. It happens regardless of the drives being rotating or solid state. It happens even with a low-level program like dd. For example, yesterday I decided to do a bit-for-bit clone backup of my 525 MB Crucial SSD with 185 GB free to an identical external USB drive connected via USB3. When I started the clone with Clonezilla, it started...