PSII only supports OneNAND device in Windows CE and Windows Mobile. However, PSIII supports both OneNAND and Flex-OneNAND device in Windows CE and Windows Mobile. PSIII adopts FSR, the new generation of XSR, to support Flex-OneNAND.

Because File System formatting is executed; File System is the upper layer of PocketStoreII. When File System formatting is performed, the loading time is quite long because read/write/erase operations on NAND flash are repeatedly applied.

PocketStoreII formatting is the process that applies GBBM2 (Samsung Electronics' bad block management scheme) to NAND flash and records partition information at Reservoir area for Read Only and Read Write region respectively.

To load PocketStoreII driver normally, NAND must be applied to GBBM2. Thus, PocketStoreII formatting must be done in advance.
GBBM2 can be applied by BML_Format APIs in BML of XSR. In development status, you can perform PocketStoreII formatting by adding BML_Format routine to Eboot. In manufacturing status, you can perform PocketStoreII formatting by ROM writer in manufacturing.

You can reduce the opening time of File System by setting a 'FATFS_DISABLE_AUTOSCAN' of the registry flag of File System.