Hello! I'm designing an embedded program that has to log messages on a microSD card -- so I presume a simple FTL. I'm wondering if I can initialize an erase erase_size portion of a file with 0xff and then make multiple writes that only clear bits, and get in-place writes (w/o an erase) instead of using out-of-place writes on a new block each time. In this way, I could just write the message size for each message (always less than 255) and interpret an 0xff as "end of list". I've looked through the mmc sources a bit and I'm not even sure if this would be a function of f2fs, the mmc layer or the FTL. Is this possibly what F2FS_IOC_SET_PIN_FILE is for? I do realize that if I make writes that require erases that I'll likely break wear leveling, so I'll want to make sure I'm never triggering erases. Thanks! Daniel
