INFORMATION TRANSFER SYSTEM FOR ROTARY MEMORY DEVICE

PURPOSE:To improve the throughput by reading out the track data before the reception of a command from a host device and storing the track data in a buffer memory after the head of a rotary storage medium is positioned. CONSTITUTION:When a seek action is over, the comparison is started between the c...

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Bibliographic Details
Main Authors OGINO AKITO, KUNO KIYOSHI, MIYAZAKI MICHIO
Format Patent
LanguageEnglish
Published 13.09.1990
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:PURPOSE:To improve the throughput by reading out the track data before the reception of a command from a host device and storing the track data in a buffer memory after the head of a rotary storage medium is positioned. CONSTITUTION:When a seek action is over, the comparison is started between the contents of a track counter 20 and a target sector register 21. A flip-flop 23 is set when a target sector is detected and a sector interruption is applied to a host device. At the same time, the detection of an address mark AM is started right after an on-track state. When a first AM is detected, the input of a phase lock loop 12 is switched to a read data pulse from a phase lock loop pulse and pulled into the read data. A flip-flop 26 is set after the fixed time and a 'buffer write' signal is applied to start a writing operation to a buffer memory 16 before a read instruction is received from the host device. Thus the throughput is improved in an information transfer system.
Bibliography:Application Number: JP19890052080