Maxtor D740X-6L 20.0 AT Product Manual page 65

Basic Principles of Operation
Sectors are considered to contain grown defects if the 14/15/16 10-bit symbols ECC
algorithm must be applied to recover the data. If this algorithm is successful, the
corrected data is stored in the newly allocated sector. If the algorithm is not successful,
a pending defect will be added to the defect list. Any subsequent read to the original
logical block will return an error if the read is not successful. A host command to over-
write the location will result in 4 write/read/verifies of the suspect location. If any of
the 4 write/read/verifies fail, the new data will be written to a spare sector, and the
original location will be added to the permanent defect list. If all 4 write/read/verifies
pass, data will be written to the location, and the pending defect will be removed from
the list.
Maxtor D740X-6L 20.0/40.0/60.0/80.0GB AT 5-16