14 log sense page 37 – Hitachi ULTRASTAR 15K450 HUS154530VLF400 User Manual

Page 179

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Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification

163

19.7.14 Log Sense Page 37

This page contains a series of miscellaneous data counters including information about predictive failure analysis occurrences.

Table 137: Log Sense Page 37

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 PFA Occurrences field gives the number of PFA occurrences during the life of the drive and not the number
of PFA events that have been reported. The number of reported PFA events may be less due to the settings of Mode Page
0x1C.

If set, the Media and Hardware PFA bits indicate that a PFA trip has occurred during the life of the drive. These flags are set
during a PFA occurrence that may or may not coincide with the reporting of a PFA event 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.

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 PFA Occurrences

32

MED

PFA

HDW

PFA

Reserved = 0

33 - 40

Total Read Commands

41 - 48

Total Write Commands

49

Reserved = 0

50-51

Flash Correction Count

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