Updated to 4.4.2 earlier today.
Tried to root my Nexus 7 later after the update. Here's what I did:
- rebooted into bootloader with adb (adb reboot-bootloader)
- unlocked the bootloader with fastboot (fastboot oem unlock)
- flashed clockworkmod using fastboot (this is the file i downloaded and flashed: -http://download2.clockworkmod.com/recoveries/recovery-clockwork-22.214.171.124-flo.img)
- rebooted into recovery
- selected "install zip>choose zip from sdcard" (trying to install supersu.zip file that I had loaded onto the internal memory)
Here's where I ran into trouble. After selecting "choose zip" nothing happens, and a message shows up on botton of the screen that says "E: Can't mount /sdcard"
So I can't install anything from clockworkmod.
I rebooted into bootloader, tried to re-flash using fastboot - "device not found"
I tried to reboot the device into android - bootloop animation
I tried wiping data, cache, factory reset, dalvik chache, etc from recovery - still getting bootloop animation