On Fri, Jan 23, 2004 at 09:59:09AM -0500, J.C. Wren wrote: > Be aware that FAT is an extremely poor format for MMC if you plan to do > much writing. Compact flash cards have automagic wear leveling > algorithms that prevent premature wearing of sectors. MMC has no such > facility.
MMC does have wear leveling. This is from MMCProdMn_5.1.pdf (sandisk): "MultiMediaCards do a read after write under margin conditions to verify that the data is written correctly. In the rare case that a bit is found to be defective, MultiMediaCards replace this bad bit with a spare bit within the sector header. If necessary, MultiMediaCards will even replace the entire sector with a spare sector. This is completely transparent to the host and does not consume any user data space." M.
