Seagate Exos X20 SATA Product Manual, Rev. B
48
www.seagate.com
Serial ATA (SATA) interface
5.3.3
Device Statistics log
The Device Statistics log (log 04H) transfers information about the drive. The data is organized as a set of 512-byte
blocks of data, whose contents are shown in
. All reserved bits or words should be set to zero.
Parameters listed with an "x" are drive-specific or vary with the state of the drive.
The following may contain drive-specific features that are included in the SATA specifications.
Table 13 Device Statistics log
Page
(hex)
Statistic
Supported
00
List of supported log pages
Yes
01
General Statistics
Lifetime Power-on Resets
Yes
Power-on Hours
Yes
Logical Sectors Written
Yes
Number of Write Commands
Yes
Logical Sectors Read
Yes
Number of Read Commands
Yes
Pending Error Count
Yes
Workload Utilization
No
Utilization Usage Rate
No
Resource Availability
No
Random Write Resources Used
No
02
Free Fall Statistics
Number of Free-Fall Events Detected
No
Overlimit Shock Events
No
03
Rotating Media Statistics
Spindle Motor Power-on Hours
Yes
Head Flying Hours
Yes
Head Loaded Events
Yes
Number of Reallocated Logical Sectors
Yes
Read Recovery Attempts
Yes
Number of Mechanical Start Failures
Yes
Number of Reallocation Candidate Logical Sectors
Yes
Number of High Priority Unload Events
Yes
04
General Errors Statistics
Number of Reported Uncorrectable Errors
Yes
Number of Resets Between Command Acceptance and Command Completion
Yes
Physical Element Status Changed
Yes
