Corrupted Partition - HTC One (AT&T)
Originally Posted by SaHiLzZ
You should be posting in the SPrint HTC One QA.. Potentially you have installed the international Recovery and that has messed up your partition. You will need to run your stock RUU or restrore atleast recovery to try to fix system/cache.
It didn't worked for me. the process which helped me was:
find the original Stock recovery.img for your device.
Boot your device in Bootloader
and flash stock recovery
fastboot flash recovery recovery.img
go back to bootloader menu and select FACTORY RESET
once again boot into Bootloader and Flash any custom Recovery CWM or TWRP
boot into recovery and thats it. This SOLVED my /data mounting problem
and adb devices not detecting my phone
problem as well