DocumentCode
1478528
Title
The effect of a reread on data reliability
Author
Patapoutian, Ara ; Vea, Mathew P.
Author_Institution
Quantum Corp., Shrewsbury, MA, USA
Volume
33
Issue
5
fYear
1997
fDate
9/1/1997 12:00:00 AM
Firstpage
2710
Lastpage
2712
Abstract
When a disk drive sector cannot be reliably decoded on a first try because of excessive errors, the sector may be read a second time. We analyze the effect of rereading the sector on data reliability. To this end, we separate noise sources into two classes: repeatable and nonrepeatable. We derive analytical expressions that predict the data reliability improvements due to reread. We show that, under reasonable assumptions, significant enhancements are achieved by a reread
Keywords
magnetic disc storage; magnetic recording noise; reliability; data reliability; decoding; disk drive sector; errors; nonrepeatable noise; repeatable noise; reread; Decoding; Detectors; Disk drives; Error correction codes; Event detection; Probability density function;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.617453
Filename
617453
Link To Document