Boots – shoes – and leggings
Patent
1981-03-06
1984-01-24
Shaw, Gareth D.
Boots, shoes, and leggings
G11B 2702
Patent
active
044280645
ABSTRACT:
In a buffered data storage subsystem, data is promoted to the buffer in anticipation of a connected host using the promoted data in the near future. In a tape recorder data storage apparatus the actual position of the tape reflects the last promoted data; such actual tape position is "inconsistent" with host operations. If the sequence of host operations continues, such inconsistency actually enhances total operations. When the subsystem detects a change or possible change in future host operations (rewind command, change in tape motion direction, etc.), detect end of file (tape mark) or a change in subsystem operations (load balance affecting drive or deallocation of buffer from drive) the data promoted to the buffer and not read by the host is erased from the buffer. The tape is moved such that upon a forward motion the tape drive would next read data on tape corresponding to the data block erased from the buffer.
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Hempy Harry O.
Kirkpatrick Charles R.
Robinson Francis L.
Dorsey Daniel K.
International Business Machines - Corporation
Shaw Gareth D.
Somermeyer H. F.
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