C9300 stack switch error after upgrade to IOS 16.6.3

[Jhonadms]

Hi All,

We are facing below error after the upgrade from 16.6.2 to 16.6.3.

*Oct  9 13:45:51.113: %IOSXE-3-PLATFORM: Switch 1 R0/0: kernel: FAT-fs (sda1): error, invalid access to FAT (entry 0x002009fa)

*Oct  9 13:45:51.113: %IOSXE-3-PLATFORM: Switch 1 R0/0: kernel: FAT-fs (sda1): error, invalid access to FAT (entry 0x002009fa)

BR

Jhon

[MUHAMMAD TAYYAB MUNIR · Accepted solution]

Hi Jhon,

Can you revert back to the previous version and let us know if you're still facing this issue.

[Mark Malone · Accepted solution]

hi
Its a software issue in the kernal under the IOS-XE , you'll need to rollback or forward to avoid it
you could run the show tech through the analyzer or post it here to run or open it with TAC if you want the exact bug id

[Jhonadms]

Hey @MUHAMMAD TAYYAB MUNIR@Mark Malone

I have revert back to previous OS and upgraded to another OS but same error message appearing continuously.

Jhon

[MUHAMMAD TAYYAB MUNIR · Accepted solution]

Hi Jhon,

I am suspecting having the issue with the (kernel: FAT-fs (sda1) disk and its required RMA so don't waste the time and create RMA or open a TAC Case.

BR,

Tayyab

[Mark Malone]

Do you have the device backed out to Cisco , something may have been damaged in the upgrade or else the bug could be in several versions
can you post the show tech or run it in the cli analzyer to see what it pulls back as an issue
It checks the hardware against known issues and bugs , you need to do that ir open a TAC case with Cisco get them to do it

[Jhonadms · Accepted solution]

@MUHAMMAD TAYYAB MUNIR@Mark Malone

Thank you for your prompt response and help.

[Leo Laohoo]

Can you try upgrading to, say, 16.10.1?
If the issue is still ongoing after upgrading to 16.10.1 then raise a TAC Case. This could be a bug.