Hitachi HTS542525K9SA00 Specifications page 193

Table 103: Read Stream Error Log
512
The Data Structure Version field shall contain a value of 02h indicating the second revision of the structure format.
The Read Stream Error Log Count field shall contain the number of uncorrected sector entries currently reportable
to the host. This value may exceed 31.
The Error Log Index indicates the error log data structure representing the most recent error. Only values (31:1)
are valid.
Deskstar 7K160 Hard Disk Drive Specification
179