Problem and Solution to a BusyBox update causing a mount failure of internal storage of the Idea USA tablet model CT802
After updating BusyBox to version 1.20 using BusyBox Installer 7.9.2 by Stephen Stericson and power cycling the Idea USA tablet model CT802, the internal storage partition /data will not mount properly.
Symptoms of the problem are that the first entry of Internal Storage in Settings-Storage will have a Total space value of 0.00 bytes. It should be 1.15GB. All application installs will fail with a message about insufficient storage space. No configuration changes will be saved. Each time the tablet is power cycled, it will behave as if being powered on for the first time and have default settings.
Something in the configuration of the Idea USA CT802 is dependent on busybox having the path /system/bin/busybox. If installing a different busybox package changes that path, internal storage partition /data will not mount properly and will appear to have zero bytes.
Solution
A factory reset or master reset is not necessary. Performing a factory reset or master reset will result in the loss of user data. The following method works due to the CT802 having a root enabled ("rooted") configuration.
On another computer, download and copy term.apk onto a micro SD card. term.apk can be downloaded from
https://github.com/jackpal/Android-Terminal-Emulator/downloads
Move the SD Card to the tablet
Enable Settings-Security-Device Administration-Unknown Sources to allow sideloading of term.apk
Run Apps-File Manager and locate term.apk on the external SD card (/mnt/extsd)
Install and open term.apk
Type su at the terminal command prompt to enter superuser mode
Type ln -s /system/xbin/busybox /system/bin/busybox to create a symbolic link to where the BusyBox Installer 7.9.2 by Stephen installed busybox 1.20
Power down the tablet
Power up the tablet and change some settings.
Disable Settings-Security-Device Administration-Unknown Sources
Power down the tablet
Power up the tablet.
Confirm Settings-Storage-Internal Storage has a non-zero value for Total space and that configuration changes made on the prior power up have remained.