Originally Posted by
Elysia
Although I really don't know what kind of program it is, I was thinking it's like a driver with real-time priority, which would make it steal all the processor power until it finishes.
On a single processor, real-time priority can easily steal the processor time from all other applications and make the OS sluggish.
And a hybrid read/write approach might make things slower too, depending on what type of disk it is. Especially on hard disks this applies, but I don't know about pen drives. Experiment!