Flash Filesystem: Difference between revisions
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3DS TWL NAND FAT partitions has FAT volume name "TWL", for CTR FAT partitions this is "CTR". The offset/size for TWL partitions are stored in the MBR partition table, while the CTR partition table info is stored in the NAND NCSD header. Sector0 in the CTR-NAND partition contains a MBR partition table for the TWL-NAND partitions, and the MBR signature at +0x1fe. | 3DS TWL NAND FAT partitions has FAT volume name "TWL", for CTR FAT partitions this is "CTR". The offset/size for TWL partitions are stored in the MBR partition table, while the CTR partition table info is stored in the NAND NCSD header. Sector0 in the CTR-NAND partition contains a MBR partition table for the TWL-NAND partitions, and the MBR signature at +0x1fe. | ||
NAND | NAND sectors which were never written to before only contain plaintext 0x00 or 0xFF bytes. | ||
None of the above physical NAND partitions are normally accessible from the ARM11, except for twlp. CTR/TWL NAND FS can only be accessed when the exheader access control descriptor for those are enabled. Normally the CTR/TWL NAND descriptors are never enabled for retail ARM11 [[NCCH#CXI|CXI]] processes. The ARM11 can only access "nand:/rw/" mounted as the nandrw [[FS:OpenArchive|archive]], and "nand:/ro/" mounted as the nandro archive below. | None of the above physical NAND partitions are normally accessible from the ARM11, except for twlp. CTR/TWL NAND FS can only be accessed when the exheader access control descriptor for those are enabled. Normally the CTR/TWL NAND descriptors are never enabled for retail ARM11 [[NCCH#CXI|CXI]] processes. The ARM11 can only access "nand:/rw/" mounted as the nandrw [[FS:OpenArchive|archive]], and "nand:/ro/" mounted as the nandro archive below. | ||
==== 0x4000 ==== | |||
On some 3DS systems(such as 3DS XL), there's a plaintext FAT16 boot record located at NAND offset 0x4000. This block does not exist for launch-day 3DS systems. This is the only plaintext block for this "partition". | |||
=CTR partition= | =CTR partition= |