Cisco said that after 28,224 hours of accumulated power-on time, “a memory buffer overrun condition occurs which triggers the firmware event in the SSD.” Turning the device off then on again fixes the problem. But the fix only lasts for 1,008 hours of powered-on operations before it recurs.
The problem is the short word using 215 before it overflows? This bug is a bizarre one.
The flaw can be fixed with new firmware that Cisco has already made available, here. Switchzilla recommends applying the patch before your Firepower boxen run for 28,224 hours.
The studio uses Cisco for the workbench. The second hand unit has been helpful.
Read the field notice.