Address mark triggered read/write head buffer

Details Address mark triggered read/write head buffer Address mark triggered read/write head buffer

1991-10-16

1994-08-23

Kulik, Paul V.

Dynamic magnetic information storage or retrieval

Head

Core

395425, 360 722, 364DIG1, 364239, 3642394, 3642397, 364243, 3642434, 364253, 3642531, G06F 1300

Patent

active

053414799

ABSTRACT:
The address mark triggered read/write head buffer provides a buffer memory for each read/write head in the rotating media data storage system that stores the entire track of data that includes the requested data record. Thus, the address mark triggered read/write head buffer retrieves the requested data record independent of the control module so that a seek request from the processor can be handled as soon as the beginning of the next data record stored on the track is positioned below the associated read/write head. The entire track is thereby staged faster on the average than the time to retrieve the requested data record. The address mark triggered read/write head buffer includes an address mark detection circuit to identify the beginning of the data field in each data record. The address mark is a predetermined data pattern of n bits that is written on the track a predetermined distance in advance of the data field of the data record. The address mark detection circuit compares the n data bits most recently read from the track with this predetermined data pattern of n bits as stored in memory. Once a match is detected, the buffer is enabled to store the next data record written on the track and all subsequent data records on the track.

REFERENCES:
patent: 4053944 (1977-10-01), Dixon
patent: 4241420 (1980-12-01), Fish et al.
patent: 4271519 (1981-06-01), Hall
patent: 4468730 (1984-08-01), Dodd et al.
patent: 4583166 (1986-04-01), Hartuny et al.
patent: 4603380 (1986-07-01), Easton et al.
patent: 4723223 (1988-02-01), Hanada
patent: 4868734 (1989-09-01), Idleman et al.
patent: 4914656 (1990-04-01), Dunphy, Jr. et al.
patent: 4918651 (1990-04-01), Bouke et al.
patent: 4984103 (1991-01-01), Nigam
patent: 5014237 (1991-05-01), Masters et al.
patent: 5155811 (1992-10-01), Dean et al.
patent: 5218689 (1993-06-01), Hotle

Affiliated with

Also associated with

Rating

Address mark triggered read/write head buffer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Address mark triggered read/write head buffer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Address mark triggered read/write head buffer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-509236