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

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

Hi, I have this box, R329Q_V8.0 RK3228A and when you turn on the word ANDROID and the following the 7 lines: E:failed to mount /cache ...

I'd suggest booting into Recovery mode and performing a Factory Reset to see if that corrects the error.

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 ...

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.

I can't enter normal recovery, I get fto mount /cache (Invalid argument) error. I got into this by trying to factory reset the phone.

How to fix Failed to mount '/data' (Invalid argument) (100% working method) Note: Dear Users This Steps Format Your Mobile and Erase All ...

I tried going into recovery and wiping cache, but any action in recovery just gives the error: E:failed to mount /cache (invalid argument)

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.