881W taking too long to format flash:1:

[Rehab_IT]

I am following this guide: https://www.cisco.com/c/en/us/support/docs/wireless/ap802-integrated-access-point/200047-AP802-Image-Recovery.html

The wireless in a couple of our 881Ws has not been working, so I figured I would follow that guide and put on the newest IOS for the AP802. However I issued the format flash:1: command about 15 hours ago and it has yet to finish. I opened a new connection to the router and checked CPU usage and ASYNC write proc is at a nearly constant 68%. I am not sure what I should do about this, I'm sure it isn't normal. 

[Leo Laohoo · Accepted solution]

Reboot the AP.
Even without an IOS, the AP has a "hidden" partition which includes an autonomous IOS.

[Rehab_IT]

This includes the AP802 card inside of the 881?

Nevermind. I see from your response on another thread that this is the case. Thank you!

Now if it would just reboot for me. The ASYNC Write Proc CPU usage is making everything slow.

[Rehab_IT · Accepted solution]

I found the actual cause of my problem. Now I just need to manage to get the new IOS on during whatever window of lowered CPU usage it will give me.

There is a recent bug that just so happens to be in the firmware we just installed a few weeks ago. While our version is not listed as a known affected, it is.

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvc39563/?rfs=iqvred

Symptom:
Routers may experience high CPU due to the "Async write proc" when a filesystem operation becomes hung.