Streaming Performance Log; Table 104: Write Stream Error Log - Hitachi HTS542525K9SA00 Specifications

Error Log Index and Write Stream Error Count cleared to zero. The Write Stream Error Log is not reserved across
power cycles and hardware reset.
Table 105: Write Stream Error Log
Description
Structure Version
Error Log Index
Write Stream Error Log Count
Reserved
Write Stream Error Log Entry #1
Write Stream Error Log Entry #2
...
Write Stream Error Log Entry #31
The Data Structure Version field shall contain a value of 02h indicating the second revision of the structure format.
The Write Stream Error Log Count field shall contain the number of Write Stream command entries since the last
power on, since this log was last read, or since hardware reset was executed.
The Error Log Index indicates the error log data structure representing the most recent error. Only values (31:0)
are valid.

12.17.6 Streaming Performance Log

Figure 112 defines the format of the log returned by the Read Log Ext command, when the LBA Low register is
20h. This data set is referred to as the Streaming Performance Parameters log, the length of which (in sectors) is
statically indicated in Read Log Ext log address 00h (Log Directory).
Deskstar 7K160 Hard Disk Drive Specification
181
Bytes Offset
1
1
2
12
16
16
16 1F0h
512
00h
01h
02h
04h
10h
20h