Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1993-06-15
1994-12-20
Young, W. R.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
360 7705, 360 7708, 369 4426, G11B 5596, G11B 700
Patent
active
053750209
ABSTRACT:
A method and apparatus for writing and reading servo data placed on a plurality of disk surfaces to minimize the degree of overlap of headers written or read by each write/read channel. Time division de-multiplexing (selecting) the writing of servo data to disk surfaces from each write/read channel and time division multiplexing the reading of servo data from the staggered headers contained on the disk surfaces coupled to each write/read channel increases the number of surfaces written to or read in a single rotation by each write/read channel. Disk surfaces are coupled to the write/read channels in groups to minimize the number of rotations required to write to or read from all the surfaces contained in the groups. Groups of surfaces may be sub-grouped. The headers of sub-groups are interleaved so that portions of the header written in a separate disk pass whose length is less than half the total length of the header may be written or read in the same rotation as another group of surfaces.
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Aggarwal Vinay K.
Lewis William D.
Rub Bernardo
Cefalo Albert P.
Digital Equipment Corporation
Hindi Nabil
Hudgens Ronald C.
Steubing Mary M.
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