Seagate STT8000A manual Glossary

Glossary Appendix A

Randomizing— A re-coding of data symbols before they are written to tape in order to provide a consistently uniform RF envelope level.

RLL (Run Length Limited)— A data encoding method where data bits are encoded so that certain constraints are met with regard to the maximum and minimum distances between flux transitions.

Serpentine— A recording method in which tracks are laid down sequentially, and the tape is not rewound at the end of a track. This recording method exploits the bi-directional capabilities of the cartridge.

Streaming—A method of recording on magnetic tape that maintains continuous tape motion without the requirement to start and stop within an inter-block gap.

Tape Drive— A peripheral storage device that records data onto removable tape cartridges. Used to back up a disk drive. (See also Disk Drive.)

Track—A longitudinal area on the tape along which magnetic signals can be serially recorded.

Track ID block—A block recorded in the Load Point and Early Warning regions to designate the track number.

Uncorrected Bit Error Rate— The probability of a bit being in error, without using any error correction techniques.

Underrun—A condition developed when the host transmits or receives data at a rate less than required by the device for streaming operation.

STT8000A Product Manual Page 75