Write Stream Error Log - Hitachi HDS725050KLA360 Specifications

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.
Table 111: Stream Error Log entry
Description
Feature Register Contents Value (current)
Feature Register Contents Value (previous)
Status
Error
LBA (7:0)
LBA (15:8)
LBA (23:16)
LBA (31:24)
LBA (39:32)
LBA (47:40)
Reserved
Sector Count (LSB)
Sector Count (MSB)
Reserved
Byte (1:0) contains the contents of the Feature Register when the error occurred. This Value shall be set to 0FFFFh
for s deferred write error.
Byte 2 contains the contents of the Status Register when the error occurred.
Byte 3 contains the contents of the Error Register when the error occurred.
Byte (9:4) indicate the starting LBA of the error.
Byte (13:12) indicate the length of the error. Therefore, each entry may describe a range of sectors at the given
address and spanning the specified number of sectors.

12.17.5 Write Stream Error log

Table 112 defines the format of the Write Stream Error log. Entries are placed into the Write Stream Error log only
when the SE bit is set to one in the Status Register. The 512 bytes returned shall contain a maximum of 31 error
entries. The Write Stream Error Count shall contain the total number of Write Stream Errors detected since the last
successful completion of the Read Log Ext command with LBA Low register set to 21h. This error count may be
greater than 31, but only the most 31 errors are represented by entries in the log. If the Write Stream Error Count
reaches the maximum value that can be represented, after the next error is detected the Write Stream Error Count
shall remain at the maximum value. After successful completion of a Read Log Ext command with the LBA Low
Register set to 21h, the Write Stream Error Log shall be reset to a power-on or hardware reset condition, with the
Register Contents Value
Register Contents Value
Deskstar 7K500 and Deskstar E7K500 Hard Disk Drive Specification
150
Bytes Offset
1 00h
1 01h
1 02h
1 03h
1 04h
1 05h
1 06h
1 07h
1 08h
1 09h
2 0A-0Bh
1 0Ch
1 0Dh
2 0E-0Fh