[DMCA]

I have several CF cards that do not use FAT, they use various other flash tuned file systems. Since these probes run VxWorks the flash more than likely has a file system on it that spread out the writes to ensure that no one section of the flash is written to more that the others. This makes that flash last longer.

[Lessismore]

Flash File System Selection Guide from Intel.

http://www.intel.com/design/flcomp/support/applnots/29766505.pdf

Wind River seems to use TrueFFS from M-Systems. Elsewhere, this has a configurable maximum number of open files. It can provide FAT if the operating system doesn't provide the File System layer above TrueFFS.