Flash Filesystem: Difference between revisions
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===Encryption=== | ===Encryption=== | ||
The NAND file system is encrypted using AES-CTR. | The NAND file system is encrypted using AES-CTR. The TWL regions of NAND use the TWL NAND [[AES|keyslot]], while the CTR regions use the CTR NAND keyslot. The TWL/CTR NAND regions are specified by the NCSD header. | ||
===Partitions=== | ===Partitions=== | ||
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|- | |- | ||
! Name | ! Name | ||
! Offset | |||
! Size | |||
! Description | ! Description | ||
|- | |- | ||
| firm0 | | firm0 | ||
| | |||
| | |||
| Firmware partition. | | Firmware partition. | ||
|- | |- | ||
| firm1 | | firm1 | ||
| | |||
| | |||
| Firmware partition. | | Firmware partition. | ||
|- | |- | ||
| nand | | nand | ||
| | |||
| | |||
| CTR-NAND FAT File System. (3DS) | | CTR-NAND FAT File System. (3DS) | ||
|- | |- | ||
| twln | | twln | ||
| TWL-NAND | | 0x00012E00 | ||
| 0x08FB5200 | |||
| TWL-NAND FAT16 File System. (DSi) | |||
|- | |- | ||
| twlp | | twlp | ||
| TWL-NAND PHOTO | | 0x09011A00 | ||
| 0x020B6600 | |||
| TWL-NAND PHOTO FAT12 File System. (DSi) | |||
|} | |} | ||
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. | |||
None of the above physical NAND partitions are normally accessible from the ARM11, except for twlp. CTR/TWL NAND 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 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. | ||
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=TWL partition= | =TWL partition= | ||
The structure of these TWL partitions | The structure of these TWL partitions is mostly the same as DSi, except tickets are stored in the CTR FAT FS. The twlp partition is exactly the same as DSi. | ||
The structure of [[twln/title]] is exactly the same as CTR NAND/SD, except the .cmd file is a cleartext file. The data directory under system titles' /title directory does not exist, this likely only exists for DSiWare. | |||
The directory names titleID-High used under [[twln/title]] is from DSi. | |||
* [[twln/title/]] | * [[twln/title/]] | ||
* [[twln/sys/ | * [[twln/ticket/]] | ||
* [[twln/tmp/]] | |||
* [[twln/import/]] | |||
* [[twln/shared1/]] | |||
* [[twln/shared2/]] | |||
* [[twln/shared2/0000]] | |||
* [[twln/sys]] | |||
* [[twln/sys/TWLFontTable.dat]] | |||
* [[twln/log/inspect.log]] | |||
* [[twln/log/product.log]] | |||
* [[twlp/photo/]] | * [[twlp/photo/]] | ||