Method Of Assigning Separate Physical End Of Tape (PEOT) Points On A Tape Device For Read Forward And Write Commands
Original Publication Date: 1981-Apr-01
Included in the Prior Art Database: 2005-Feb-11
The position of the tape on a tape drive is known to the microcode by counting tachometer (T2) pulses from a 500-line tachometer on the file reel, between each tachometer (T1) pulse from a single line tachometer on the machine reel. This count represents a radius on the file reel, since the tape on the file reel is manufactured to a radius tolerance.