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11.23.3 Device Statistics log
The Device Statistics log contains selected statistics about the device.
The number of log pages may be greater than one.
See Table 93 for a list of defined log pages. Each supported log page consists of a header field that may be followed
by defined statistics fields. If the Revision Number field in the log page header is 0000h, then that log page is not
supported. All log page data following the last defined statistic for that log page is reserved.
If an unsupported log page is requested, then 512 bytes of all zeros are returned for that log page.
Description
List of supported log pages (Table 96)
General Statistics (Table 97)
Free Fall Statistics (Not Support)
Rotating Media Statistics (Table 98)
General Errors Statistics (Table 99)
Temperature Statistics (Table 100)
Transport Statistics (Table 101)
Solid State Device Statistics (Not Support)
Reserved
Table 151 Defined Device Statistics log pages
11.23.3.1
List of Supported Device Statistics log pages (log page
00h)
The List of Supported Device Statistics log pages contains a list of the supported device statistics log pages as
described in Table 96. Entries are in order of ascending log page number. Every log page for which there is at least
one supported statistic is listed.
Description
Device Statistics Information Header. This device statistics log page
lists the number of the supported device statistics log pages.
Bit
Description
63:24
Reserved
23:16
Log page number. (00h)
15:0
Revision number. (0001h)
Number of entries (n) in the following list
Log page number of first supported device statistics log page (00h)
Log page number of second supported device statistics log page
Log page number of nth supported device statistics log page
Reserved
Table 152 List of supported Device Statistics log pages
Log page
08h..Ffh
...
Western Digital Hard Disk Drive OEM Specification
00h
01h
02h
03h
04h
05h
06h
07h
Bytes
8
1
1
1
1
180
Offset
00h
08h
09h
0ah
n+08h
n+09h..1Ffh
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