Hi Skimask,

Isn't the file size in FAT32 stored at 2 different places? And both of them have to be identical? I forget...it's been awhile since I read the FAT32 documentation...
Sorry, I forgot to say that I'm using FAT16 when I format the MMC. It's the native format that the MMC's came with. I don't know what version of FAT16 I'm using. I understand there at least several versions or revisions to the FAT16 system. The MMC's I'm using are 128MB in size.

...look into the F-RAM options.
Yes, for a final in-field application this would be the way to go. As it is, I'm cheap and have the EEPROM's on hand. My application is data recording at about 100 sectors a second. For writing the data it will be sent directly to the card. The EEPROM use in my ap would only be at the first and end of the recording events (about 10-15 minutes long) and this would be just to address the FAT issues.

I'm back off to some of my web haunts where I've been reading about FAT16. Maybe I'll find the answer by going back over these sites. I do have this odd recollection of there being some part of the FAT where data is written LSByte first. Maybe it was the file size?

Gary
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