Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
150
18.7.17
Log Sense Page 37
This page contains a series of miscellaneous data counters including information about predictive failure analysis
occurrences.
Table 124 Log Sense Page 37
Byte
Bit
7 6 5 4 3 2 1 0
0
Reserved
Page code = 37h
1
Reserved
2-3
Page Length = 0030h (48)
4-5
Parameter Code = 0000h
6
DU=0
DS=0
TSD=0
ETC=0
TMC = 0
F&L = 00b
7
Parameter Length = 2Ch
8 - 11
(MSB)
Power on Hours (hours only)
(LSB)
12 - 19
(MSB)
Total Bytes Read
(LSB)
20 - 27
(MSB)
Total Bytes Written
(LSB)
28
Max Drive Temp (degrees Celsius)
29 - 30
(MSB)
GList Size
(LSB)
31
Number of Information Exceptions
32
MED EXC HDW EXC Reserved = 0
33 - 40
Total Read Commands
41 - 48
Total Write Commands
49
Reserved = 0
50-51
Flash Correction Count
The Power on Hours field specifies the total time the drive has been powered on in hours only.
The Max. Drive Temperature field specifies the maximum temperature, in degrees Celsius, the drive has ever
reached.
The Glist Size field gives the total number of LBAs that have been reassigned on the drive.
The Number of Information Exceptions field gives the number of Information Exceptions during the life of the drive
and not the number of Information Exceptions that have been reported. The number of reported Information
Exceptions may be less due to the settings of Mode Page 0x1C.NOTE: This field does not include occurrences of
any Information Exception Warnings.
If set, the Media Exception and Hardware Exception bits indicate that an Information Exception has occurred
during the life of the drive. These flags are set during an Information Exception that may or may not coincide with the
reporting of an Information Exceptions as mentioned above.
Total Read Commands counter is incremented for each Read (6) and Read (10) command received.
Total Write Commands counter is incremented for each Write (6), Write (10), Write Verify and Write Verify (16)
command received.
Flash Correction Count is incremented each time ECC correction is applied to data stored in Flash ROM.