Seagate Nytro 2.5” x 7mm SSD Product Manual, Rev. A
19
Interface requirements
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96
16
Controller Busy Time (in minutes)
Contains the amount of time the controller is
busy with I/O commands. The controller is
busy when there is a command outstanding to
an I/O Queue (specifically, a command was
issued by way of an I/O Submission Queue Tail
doorbell write and the
corresponding completion queue entry has
not been posted yet to the associated I/O Com-
pletion Queue). This value is reported in min-
utes.
112
16
Power Cycles
Contains the number of power cycles.
128
16
Power On Hours
Contains the number of power-on hours. This
does not include time that the controller was
powered and in a low power state
condition.
144
16
Unsafe Shutdowns
Contains the number of unsafe shutdowns.
This count is incremented when a shutdown
notification (CC.SHN) is not received prior to
loss of power.
160
16
Media Errors
Contains the number of occurrences where the
controller detected an unrecovered data integ-
rity error. Errors such as uncorrectable ECC,
CRC checksum failure, or LBA tag mismatch are
included in this field.
176
16
Number of Error Information Log Entries
Contains the number of Error Information log
entries over the life of the controller.
Table 20 SMART Attributes (Log Identifier 02h)
(continued)
Byte
# of Bytes
Attribute
Description
