This message was posted on behalf of Intel Corporation
Thank you for contacting our support community. We understand your concern regarding the Intel® Optane™ SSD 900P Series.
We would like to inform you that the "Controller Busy Time" means the following:
"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 Completion Queue).
This value is reported in minutes."
Based on that, it is normal and expected that the value increases since it is reported in minutes.
Please let us know if there is something else we can assist you with.