[gentoo-user] [OT]: Is that (filesystem-)logic vald?

Hi,

I have an embedded system with internal flash memory. 
The internal flash memory contains some static files,
which are only be read and others, which get written
from time to time.

The internal flash has a FAT32-formatted filesystem
and no real partiton (the device is directly fomratted
as so often with this kind of lash memories.

From time to time the software crashes while updateing
some files (writing to them) leaving a unclean filesystem
behind.

Often -- after fscking the filesystem -- files named
FSCK<number>.REC are left in the root of the filesystem.

Is it correct to assume, that only those files are
affected by correcting the filesysten which were written/updated
before or is there any chance, that other, only read files
are also affected?

Thank you very much for any help in advance!
Best regards,
mcc