Integrated Sector Format IBM Almaden Research Center Martin Hassner IBM Almaden Research Center San Jose, CA 95120 September 19, 2001

Integrated Sector ECC Format September 19, 2001

COMPAQ Long Block Format Proposal 8 -Sector 4 kB-Block Physical Alignment Integral Multiple of 4 kB -Blocks Layout Logical-to-Physical Translation September 19, 2001

IBM ISF-ECC COMPAQ Long Block Format Multi-Level C1/C2/C3-Error Correction – { Low-Overhead Long-Burst Correction – { Low-SNR OTF-Correction – { Read-Modify-Write (RMW) Optional MOST Data is LONG -Burst/ LOW -SNR Protected Implementation Path: MOST g ALL September 19, 2001

Integrated Sector Format m r m r m r m r r m r m r m r m r r r 1 1 2 2 3 3 4 a 4 5 5 6 6 2 2 8 c b 8 September 19, 2001

MULTI-LEVEL ENCODER ALGORITHM September 19, 2001

MULTI-LEVEL DECODER ALGORITHM September 19, 2001