Hi There

New to the forum, wasn't sure where to post this.

Does anyone know of any MMC card diagnostic software? The reason I'm asking is I am doing some micro development which involves reading/writing to a RS MMC using custom hardware, its quite possible I have corrupted the 512MB card. Be really handy to know what state the card is in.

Card currently has 1x10MB FAT16 formatted partition. When in card reader Windows can see this partition fine, reads fine, appears to write a test file fine but on next power up of card it is back in its original state (i.e. no test file). Windows fails to format the partition, Linux cannot change the partition table, its unusable :(

Its as if the card is in a write protected state, although no error messages are given when a write is attempted.

Any ideas?