Block address integrity check for storage medium

Details Block address integrity check for storage medium Block address integrity check for storage medium

1995-01-25

1998-02-10

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

360 48, 360 49, 360 7814, G11B 509, G11B 5596

Patent

active

057175357

ABSTRACT:
A magnetic disc storage system includes a rotating magnetic disc and a read/write transducer positioned proximate a recording surface of the magnetic disc for reading and writing information on the recording surface. Data stored on the recording surface is altered based upon the address of the data. During readback, a pseudorandom number generator receives a desired address as a seed input and provides a pseudorandom number output. An XOR gate provides an XOR output in response to the pseudorandom number output and the readback signal from the read/write transducer. An error detection circuit provides a decoded data output and an error flag output in response to the XOR output. An error during readback indicated by the error flag output is indicative of an incorrect address of the readback signal in comparison to the desired address. During a write operation, data is provided to an error detector encoder circuit which provides an encoded data output to an XOR gate. A pseudorandom number generator receives the address of the data as a seed input and provides a pseudorandom number to the XOR gate. The output of the XOR gate is written on the surface of the magnetic disc by the read/write transducer.

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