1- 'fsck' is run/scheduled automatically if on power-up the OS notices a dirty filesystem. AFAIK you cannot run the command manually.
2- the FG-60E doesn't have any internal disk. There is only a flash memory chip on which firmware, signature databases and the config is stored. The FG-61E does indeed feature an internal SSD for logging/WAN optimization.
I have been getting the power interruption message and file system check on various FG's in my organization when doing firmware updates. Happened on 2 different models a 90D going from 5.2.4-5.2.13 and a 100D from 5.2.13-5.4.0. I know this is not an actual power issue but probably something in the reboot command in the firmware update somewhere. I am hoping my disks dont go bad because of it and it is just poor coding. One device was stuck in maintenance mode and had to be powered off via switch.
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