DEC RX02
From Just Solve the File Format Problem
DEC RX02 is a type of 8" floppy disk used by DEC. It has 77 tracks of 26 sectors, with a 256 byte sector size, for a total capacity of 512K. A mixture of FM encoding and MFM encoding is used, getting twice the capacity of the DEC RX01 with the same number of tracks and sectors.
