If you own a Samsung Galaxy S II or the Galaxy Note and are a regular member of the xda-developers forum, you may already be aware of a bug with some of these devices where erasing the eMMC could hard brick your phone.
This problem would surface if the user tried to flash a custom ROM or kernel that used MMC_CAP_ERASE. Thankfully, developerChainfire came up with an app that would let you know if your device was shipped with a faulty eMMC.
Apparently, this issue has existed for a long time now and even though it was noticed a couple of months ago and was much talked about in the developer community Samsung did not respond to it, until now.