Methods for recording and reading data from a record member havi

Details Methods for recording and reading data from a record member havi Methods for recording and reading data from a record member havi

1992-11-19

1994-08-02

Lee, Thomas C.

Dynamic magnetic information storage or retrieval

Head

Core

360 48, G06F 1206, B11R 509

Patent

active

053353285

ABSTRACT:
Information bearing signals are recorded in one of a plurality of record formats on one record medium, such as a magnetic tape, magnetic disk, optical disk, and the like. The format selected may be commanded or based upon record lengths, in bytes. When the record length equals or exceeds a predetermined number of bytes, then one record is recorded in each signal block of the record format. When the record length is less than the predetermined number, then a second format is used which inserts several of the records in one of the signal blocks. The signal block and its packets respectively contain indications of formats such that any one of several formats may be used on one record medium and in one signal block having a plurality of variable length packets. Logical indicators, such as format marks, tape marks, and the like, may separate formats used on the storage medium.

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