The status of UBIFS in Linux on top of MLC NAND has never been exactly perfect. And while this entry has now been removed from the FAQ nowadays, the support for UBIFS on top of MLC NAND has now been officially reported as unsupported:
Full thread on patchwork.kernel.org:
So I am now looking for a long term filesystem replacement for a MLC NAND as found on a MIPS Creator CI20:
This is a Samsung K9GBG08UOA NAND flash and it does not appear that there is a way to put this device in SLC mode.
It seems that jffs2 is also not an alternative:
Is there any other alternative filesystem (possibly with comparable performance) ?