Table 234 Smart Log Directory; Table 235 Smart Summary Error Log Sector - Western Digital Ultrastar DC HC310 Specifications

11.51.4 SMART Log Directory
Table 234 defines the 512 bytes that make up the SMART Log Directory. The SMART Log Directory is SMART Log
Address zero and is defined as one sector long.
Description
SMART Logging Version
Number of sectors in the log at log address 1
Reserved
Number of sectors in the log at log address 2
Reserved
...
Number of sectors in the log at log address 255
Reserved

Table 234 SMART Log Directory

The value of the SMART Logging Version word shall be 01h. The logs at log addresses 80-9Fh shall each be defined
as 16 sectors long.
11.51.5 SMART summary error log sector
The following defines the 512 bytes that make up the SMART summary error log sector. All multi-byte fields shown in
this data structure follow the ATA/ATAPI-7 specifications for byte ordering.
Description
SMART error log version
Error log index
st
1 error log data structure
nd
2 error log data structure
rd
3 error log data structure
th
4 error log data structure
th
5 error log data structure
Device error count
Reserved
Data structure checksum

Table 235 SMART summary error log sector

11.51.5.1 SMART error log version
This value is set to 01h.
11.51.5.2 Error log index
This points the most recent error log data structure. Only values 1 through 5 are valid.
11.51.5.3 Device error count
This field contains the total number of errors. The value will not roll over.
Western Digital Hard Disk Drive OEM Specification
Bytes
2
1
1
1
1
...
1
1
512
Bytes
1
1
90
90
90
90
90
2
57
1
512
273
Offset
00h
02h
03h
04h
05h
...
1Feh
1FFh
Offset
00h
01h
02h
5Ch
B6h
110h
16Ah
1C4h
1C6h
1FFh