What does E

Trying to wipe cache, factory reset the phone, mount /system, flash a ROM from SD card, ADB sideload, everything gives the error multiple times.

Format the cache partition, that will help you to mount later. Just go for Wipe menu from TWRP home screen and select cache .

If it's still unmountable you just need to click on format, next to array start/stop button. Has worked for 15 days since I ...

So I turned on my tablet one morning and I woke up to a complete factory reset on it. I recovered all my files and set it up the same way ...

It's not a reboot loop, it hangs during the boot process. Most likely due to a corrupted file system, as the error messages in my OP suggest.

Out tablet will not start. When it comes on, it stays on the Fire logo screen. We've tried to wipe data/ factory reset, it's just giving this error message.

My TV is stuck in recovery mode and I'm getting failed to mount /cache error. I have tried wiping cache and partitions. Tried to flash rom as well via USB.

In Android System Recovery, I receive a scrawl that states: E:failed to mount /cache (No such file or directory) E:Can't mount /cache/recovery/log E:Can't open ...

Try fix the failed to mount cache issue, you have to go to recovery menu and mount system and then clear cache again. It will fix the issue.

Actually I somehow managed to solve the issue few minutes ago. I just used wipe cache function, left the phone for about 10 min and it did it. ...