MS-DOS FAT file system ripped off? (from WHOM?)

In the Commodore 1541 floppy drive controller, there's a job code for BUMP which sends the drive out to never-never land, stopped only by the track 1 stop, an analogous situation. Loud! When a drive seek fails, the drive first tries to read the halftrack (recall that Commodore disks are 48 tpi, not 96), then BUMPs out and back, tries to read the sector, tries to read the half-track again, BUMPs out and back, and so on, until it reaches a flag value stored in drive RAM, at which point it declares the error. Very noisy, and the drive light flashes randomly during this process. A program called Drive Music (and I have a program called Drive Composer which worked on a similar principle) used the "head-banging" to play music, by vibrating the head against the track 1 stop at varying frequencies. Very ingenious. :-)