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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
Log page
List of supported log pages (Table 96)
00h
General Statistics (Table 97)
01h
Free Fall Statistics (Not Support)
02h
Rotating Media Statistics (Table 98)
03h
General Errors Statistics (Table 99)
04h
Temperature Statistics (Table 100)
05h
Transport Statistics (Table 101)
06h
Solid State Device Statistics (Not Support)
07h
Reserved
08h..Ffh
Table 151 Defined Device Statistics Log Pages
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
Bytes
Offset
Device Statistics Information Header. This device statistics log page
lists the number of the supported device statistics log pages.
8
00h
Bit
Description
63:24
Reserved
23:16
Log page number. (00h)
15:0
Revision number. (0001h)
Number of entries (n) in the following list
1
08h
Log page number of first supported device statistics log page (00h)
1
09h
Log page number of second supported device statistics log page
1
0ah
…
Log page number of nth supported device statistics log page
1
n+08h
Reserved
n+09h..1Ffh
Table 152 List of Supported Device Statistics Log Pages
196
Western Digital Ultrastar DC HC310 SATA Product Manual