​KembaraXtra-Computer Terms – block gap:
A block gap is the unused physical space that separates blocks of data on storage media such as magnetic tape or formatted sectors on a disk. This gap acts as a buffer between blocks, helping devices distinguish where one block ends and another begins.
The presence of block gaps ensures reliable data reading and writing, especially in systems where precise positioning of the read/write head is required. These gaps are also known as interblock gaps (IBG).