I remove atime on ext2 filesystem on my PC. Just do the same on the IT?

While FAT is adapted for very small cpu systems, there are a lot of limitations..
->Max File size
->No links (hard/soft) <-- painful for people here who port stuffs
->No security wrt to User Rights. Also no posix file permissions.
->Case insensitive
->No recovery mechanism
->Obscure patent
->Strange naming convention
->Character encoding

I agree about journaling impact..