Technical Details
9-track 800 NRZI and 1600 PE (phase encoding) tapes use a 0.6 inches (15 mm) inter-record gap (IRG) between data records to allow the tape to stop and start between records. 6250 GCR tapes use a tighter 0.3 inches (7.6 mm) IRG. The 9-track tapes had reflective stickers placed 10 feet (3.0 m) from the beginning of tape (BOT) and 14 feet (4.3 m) from the end of tape (EOT) to signal the hardware. Nine-track tapes commonly had densities of 800, 1600, and 6250 cpi, giving approximately 20MB, 40MB and 140MB respectively on a standard 2,400 feet (730 m) tape. Signaling EOT (end of tape) with space remaining to write trailer blocks allowed support for multivolume labelled tapes.
Read more about this topic: 9 Track Tape
Famous quotes containing the words technical and/or details:
“The axioms of physics translate the laws of ethics. Thus, “the whole is greater than its part;” “reaction is equal to action;” “the smallest weight may be made to lift the greatest, the difference of weight being compensated by time;” and many the like propositions, which have an ethical as well as physical sense. These propositions have a much more extensive and universal sense when applied to human life, than when confined to technical use.”
—Ralph Waldo Emerson (1803–1882)
“If my sons are to become the kind of men our daughters would be pleased to live among, attention to domestic details is critical. The hostilities that arise over housework...are crushing the daughters of my generation....Change takes time, but men’s continued obliviousness to home responsibilities is causing women everywhere to expire of trivialities.”
—Mary Kay Blakely (20th century)