[FormerPalmOS]

I learned a couple of new items that mostly render this discussion moot. First and foremost, for the changes to be effective on the FLASHDRV FAT file system, they must be made to the boot hive that is loaded by the SPL. The registry that you can edit after the system is booted is loaded by the file system - these changes need to be made to the minimal registry (boot.hv) that is loaded in order to load the file system. That means they have to be cooked into the ROM.

That said, you can apply these changes to the SDMemory file system.

I also learned that the system-manged settings actually appear to do a pretty good job. I am currently running with DataCacheSize and FatCacheSize both set to 0 (system managed) on my SD card and it seems to be faster (but then again I also thought the machine was faster with the changes made in the first thread and that may not have been the case).

I have updated the first post to reflect the new learning - the remaining posts have not been updated.