Nintendo Switch Brew

Flash Filesystem: Difference between revisions

← Older editNewer edit →
m ->
No edit summary
Line 1: Line 1:
= NAND structure =
= NAND structure =
The Switch's eMMC storage features a large user area, two smaller boot partitions, and a replay-protected memory block which is unused (no authentication key is programmed).
The Switch's eMMC storage features a large user area, two smaller boot partitions and a replay-protected memory block which is unused (no authentication key is programmed).
 
All official partition names come from [[SystemInitializer]].


== Boot Partitions ==
== Boot Partitions ==


'''Boot Partition 0 (0 of 1)'''
'''Boot Partition 0 (0 of 1)'''
The official name for this partition is "BootPartition1Root" and it has [[Filesystem_services|Bis]] Partition ID == 0.
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
Line 13: Line 18:
|  0x000000
|  0x000000
|  0x4000
|  0x4000
|  Title 0100000000000819 [[BCT|BCT]]
|  Normal Firmware [[BCT|BCT]] from [[Title_list#System_Data_Archives|Title 0100000000000819]]
|-
|-
|  0x004000
|  0x004000
|  0x4000
|  0x4000
|  Title 010000000000081A [[BCT|BCT]]
|  SafeMode Firmware [[BCT|BCT]] from [[Title_list#System_Data_Archives|Title 010000000000081A]]
|-
|-
|  0x008000
|  0x008000
|  0x4000
|  0x4000
|  Title 0100000000000819 [[BCT|BCT]]
|  Normal Firmware [[BCT|BCT]] from [[Title_list#System_Data_Archives|Title 0100000000000819]] (backup)
|-
|-
|  0x00C000
|  0x00C000
|  0x4000
|  0x4000
|  Title 010000000000081A [[BCT|BCT]]
|  SafeMode Firmware [[BCT|BCT]] from [[Title_list#System_Data_Archives|Title 010000000000081A]] (backup)
|-
|-
|  0x010000
|  0x010000
Line 33: Line 38:
|  0x100000
|  0x100000
|  0x40000
|  0x40000
|  Title 0100000000000819 "package1"
|  Normal Firmware [[Package1|package1]] from [[Title_list#System_Data_Archives|Title 0100000000000819]]
|-
|-
|  0x140000
|  0x140000
|  0x40000
|  0x40000
|  Title 0100000000000819 "package1" (Backup)
|  Normal Firmware [[Package1|package1]] from [[Title_list#System_Data_Archives|Title 0100000000000819]] (backup)
|-
|-
|  0x180000
|  0x180000
Line 49: Line 54:
|  0x184020
|  0x184020
|  0x8?
|  0x8?
| Increments on every boot until hitting a certain number? Bottom 10 bits (0x3FF) are always zero. All zero on 1.0.
| Increments on every boot until hitting a certain number? Bottom 10 bits (0x3FF) are always zero. All zero on 1.0.
|}
|}


'''Boot Partition 1 (1 of 1)'''
'''Boot Partition 1 (1 of 1)'''
The official name for this partition is "BootPartition2Root" and it has [[Filesystem_services|Bis]] Partition ID == 10.
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
Line 61: Line 69:
|  0x000000
|  0x000000
|  0x40000
|  0x40000
|  Title 010000000000081A "package1"
|  SafeMode Firmware [[Package1|package1]] from [[Title_list#System_Data_Archives|Title 010000000000081A]]
|-
|-
|  0x040000
|  0x040000
|  0x40000
|  0x40000
|  Title 010000000000081A "package1" (Backup)
|  SafeMode Firmware [[Package1|package1]] from [[Title_list#System_Data_Archives|Title 010000000000081A]] (backup)
|-
|  0x080000
|  0x40000
|
|-
|  0x0C0000
|  0x40000
|
|}
|}


=== Keyblob ===
=== Keyblob ===
Starting at offset 0x180000 is an array of 0x200-byte entries, for a total of 32 keyblobs. Each one is unique compared to the others and they are all console unique.
Starting at offset 0x180000 is an array of 0x200-byte entries, for a total of 32 keyblobs. Each one is unique compared to the others and they are all console unique. This is officially known as the "EKS" (encryption key source) area.


From each 0x200-byte entry only the first 0xB0 bytes effectively form the keyblob as below.
From each 0x200-byte entry only the first 0xB0 bytes effectively form the keyblob as below.
Line 108: Line 108:


[[Boot]] also uses this index for repairing corrupt sectors.
[[Boot]] also uses this index for repairing corrupt sectors.
The currently active keyblob is officially known as "SecureInfo".


== User Partitions ==
== User Partitions ==
Line 124: Line 126:
|  20
|  20
|  No
|  No
|  GPT header, Bis-storage also allows raw access to the entire NAND eMMC sectors starting at sector0. The official name for this partitionID from [[SystemInitializer]] is "nn::fs::BisPartitionId::UserDataRoot".
|  GPT header, Bis-storage also allows raw access to the entire NAND eMMC sectors starting at sector0. The official name for this partition is "UserDataRoot".
|-
|-
|  PRODINFO
|  PRODINFO
Line 131: Line 133:
|  27
|  27
|  Yes
|  Yes
|  "CAL0" raw partition containing set:cal data.
|  "CAL0" raw partition containing set:cal data. The official name for this partition is "CalibrationBinary".
|-
|-
|  PRODINFOF
|  PRODINFOF
Line 138: Line 140:
|  28
|  28
|  Yes
|  Yes
|  FAT12 filesystem, additional calibration.
|  FAT12 filesystem, additional calibration. The official name for this partition is "CalibrationFile".
|-
|-
|  BCPKG2-1-Normal-Main
|  BCPKG2-1-Normal-Main
Line 145: Line 147:
|  21
|  21
|  No
|  No
|  For all these packages, data starts at offset 0x4000 and is not console-unique. This is installed from "package2" in firmware package A (0100000000000819) by default. With the exFAT update installed, this is switched to firmware package C (010000000000081B). The data stored here matches the raw /nx/package2 file stored in the 81[9AB] data archives -- there is no additional encryption. "BCPKG2" is "BootConfigAndPackage2": for example, from [[Factory_Setup|SystemInitializer]]: "BootConfigAndPackage2Part1".
|  Raw partition where the first 0x4000 bytes (usually empty) contain the "BootConfig" and the remaining space contains the [[Package2|package2]] image from [[Title_list#System_Data_Archives|Title 0100000000000819]] by default. With the exFAT update installed, the [[Package2|package2]] image is switched to the one from [[Title_list#System_Data_Archives|Title 010000000000081B]]. The official name for this partition is "BootConfigAndPackage2Part1".
|-
|-
|  BCPKG2-2-Normal-Sub
|  BCPKG2-2-Normal-Sub
Line 152: Line 154:
|  22
|  22
|  No
|  No
|  Identical to BCPKG2-1-Normal-Main, probably used as a backup partition.
|  Backup partition for BCPKG2-1-Normal-Main. The official name for this partition is "BootConfigAndPackage2Part2".
|-
|-
|  BCPKG2-3-SafeMode-Main
|  BCPKG2-3-SafeMode-Main
Line 159: Line 161:
|  23
|  23
|  No
|  No
|  This is installed from "package2" in firmware package B (010000000000081A).
|  Raw partition where the first 0x4000 bytes (usually empty) contain the "BootConfig" and the remaining space contains the [[Package2|package2]] image from [[Title_list#System_Data_Archives|Title 010000000000081A]] by default. Starting with firmware version [[4.0.0|4.0.0]], the [[Package2|package2]] image is switched to the one from [[Title_list#System_Data_Archives|Title 010000000000081C]]. The official name for this partition is "BootConfigAndPackage2Part3".
|-
|-
|  BCPKG2-4-SafeMode-Sub
|  BCPKG2-4-SafeMode-Sub
Line 166: Line 168:
|  24
|  24
|  No
|  No
|  Identical to BCPKG2-3-SafeMode-Main.
|  Backup partition for BCPKG2-3-SafeMode-Main. The official name for this partition is "BootConfigAndPackage2Part4".
|-
|-
|  BCPKG2-5-Repair-Main
|  BCPKG2-5-Repair-Main
Line 173: Line 175:
|  25
|  25
|  No
|  No
|  Installed at the factory, never written afterwards on retail. In one case this is identical to normal [[1.0.0]] pkg2, except this has encrypted data at the end padded for 0x1000-byte alignment.
|  Installed at the factory, never written afterwards on retail. In one case this is identical to normal [[1.0.0]] [[Package2|package2]], except this has encrypted data at the end padded for 0x1000-byte alignment. The official name for this partition is "BootConfigAndPackage2Part5".
|-
|-
|  BCPKG2-6-Repair-Sub
|  BCPKG2-6-Repair-Sub
Line 180: Line 182:
|  26
|  26
|  No
|  No
|  Identical to BCPKG2-5-Repair-Main.
|  Backup partition for BCPKG2-5-Repair-Main. The official name for this partition is "BootConfigAndPackage2Part6".
|-
|-
|  SAFE
|  SAFE
Line 187: Line 189:
|  29
|  29
|  Yes
|  Yes
|  FAT32 filesystem.
|  FAT32 filesystem. The official name for this partition is "SafeMode".
|-
|-
|  SYSTEM
|  SYSTEM
Line 194: Line 196:
|  31 and 32
|  31 and 32
|  Yes
|  Yes
|  FAT32 filesystem.
|  FAT32 filesystem. The official name for this partition is "SystemProperEncryption".
|-
|-
|  USER
|  USER
Line 208: Line 210:
|  
|  
|  No
|  No
| This is the backup GPT header specified by the main GPT header. This is also the last sector readable with Bis-storage paritionID 20.
| This is the backup GPT header specified by the main GPT header. This is also the last sector readable with Bis-storage paritionID 20.
|}
|}


Retrieved from "https://switchbrew.org/wiki/Flash_Filesystem"