Data recovery in a disc drive with redundant sync data blocks

Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data clocking

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G11B 509

Patent

active

06097561&

ABSTRACT:
An apparatus and method are disclosed for improving data recovery operations in a disc drive employing a redundant sync data block format. The disc drive includes a rotatable disc and a controllably positionable head which is used to store user data in a plurality of data blocks on tracks of the disc. Each data block includes a user data field to store user data, a first sync field and a redundant, second sync field, the sync fields storing first and second sync words, respectively, which establish symbol boundaries used by a read channel of the disc drive. User data are recovered from a selected data block by initiating a delay of selected duration during which a first portion of the selected data block passes proximate the head, allowing the second, remaining portion of the selected data block to be read at the completion of the delay. Data can thus be recovered in the presence of mis-sync errors, wherein a selected sync word is detected early or late by one or more bits, as well as from non-contiguous data blocks that are split into two fragments to accommodate a coincident servo block.

REFERENCES:
patent: 5047876 (1991-09-01), Holsinger
patent: 5136439 (1992-08-01), Weispfenning et al.
patent: 5262907 (1993-11-01), Duffy et al.
patent: 5276662 (1994-01-01), Shaver, Jr. et al.
patent: 5422760 (1995-06-01), Abbott et al.
patent: 5459757 (1995-10-01), Minuhin et al.
patent: 5592340 (1997-01-01), Minuhin et al.
patent: 5627843 (1997-05-01), Deng et al.
patent: 5631999 (1997-05-01), Dinsmore
patent: 5812335 (1998-09-01), Kool et al.
patent: 5844920 (1998-12-01), Zook et al.
patent: 5940233 (1999-08-01), Malone, Sr.
Finch and Moczarny, "Headerless disk formatting: Making room for more data," Data Storage Magazine, Apr. 1997, p.p. 51, 52 and 54, vol. 4 No. 5, Pennwell Publishing Co., Tulsa, Oklahoma.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Data recovery in a disc drive with redundant sync data blocks does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data recovery in a disc drive with redundant sync data blocks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data recovery in a disc drive with redundant sync data blocks will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-669765

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.