I know IOS AP can be format flash by "fsck flash:". For ClickOS AP, I don't know how to format flash. If you know, could you tell me?
In addtion,I also want to understand the following questions:
1. How does the AP enter (RNAQ-C7) # mode?
2. How does the AP enter u-boot mode?
3. What is the difference between (RNAQ-C7) # and u-boot mode?
Thanks a lot !
Why would you want to format the flash, if there is no reason? You could just delete the necessary files. AS far as I'm aware, with access-points running ClickOS, there is no "format" option available to a regular user. You can just delete files from flash, using "delete" command, which is identical as in regular IOS.
Without having any confirmation from Cisco, i say that RNAQ-C7 is your regular rommon (perform upgrades, etc), while U-Boot is like a super rommon, where you have limited access; this is for TAC advanced troubleshooting, where TAC has more than limited access.
My feeling with the "format" option disappearing, is that there have been many issues with Cisco AP's flash, so probably they decided to leave the "format" option aside.
I would assume it's available from U-boot, but not sure. Open a TAC case and post what you find out about U-boot mode :)