Defect Management; Automatic Defect Allocation; Multi-Burst Ecc Correction - Seagate M8U-Internal SpinPoint Product Manual

5.5.3 Defect Management

The Spinpoint M8U hard disk drive media is scanned for defects.
are saved in the defect list.
physical sector location.
data. The read/write operation can "slip" over the defective sectors so that the only performance impact is
idle time.

5.5.4 Automatic Defect Allocation

The automatic defect allocation feature automatically maps out defective sectors encountered during read
sector or write sector operations.
During write operations, if write errors are encountered, all sectors within the target servo frame are mapped
out. Original data is transferred and written into designated reserved sector areas determined by the HDD
firmware.

5.5.5 Multi-burst ECC Correction

The drive uses a Reed-Solomon code to perform error detection and correction.
the software error correction polynomial is capable of correcting:
•
One 191-bit burst error
•
Up to 48 bytes with reassure pointer (off-line correction)
These errors are corrected on the fly with no performance degradation.
Spinpoint M8U-Internal Product Manual REV 3.4
A defect encountered in the manufacturing process is slipped to the next
All logical sector numbers are pushed down to maintain a sequential order of
These types of defective sectors are typically caused by grown defects.
INSTALLATION
After defect scanning, the defective sectors
For each 512 byte block,
31