FATX - Revision history

PWolfram: Added preliminary FATX header table.

2025-10-27T04:08:54Z

Added preliminary FATX header table.

VannevarKush at 05:38, 3 July 2022

2022-07-03T05:38:18Z

VannevarKush at 05:34, 3 July 2022

2022-07-03T05:34:40Z

VannevarKush at 05:34, 3 July 2022

2022-07-03T05:34:12Z

VannevarKush: Adding earlier version of Linux fatx doc

2022-07-03T05:33:33Z

Adding earlier version of Linux fatx doc

Teufelchen at 11:05, 29 September 2021

2021-09-29T11:05:23Z

Espes at 11:16, 27 December 2018

2018-12-27T11:16:18Z

Espes at 11:12, 27 December 2018

2018-12-27T11:12:35Z

Mborgerson: Created page with "The file system used on the Xbox is FATX, a variant of FAT16/32 developed by Microsoft specifically for the Xbox. == Implementations == {| class="wikitable |- ! Name ! P..."

2017-05-20T01:08:41Z

Created page with "The file system used on the Xbox is FATX, a variant of FAT16/32 developed by Microsoft specifically for the Xbox. == Implementations == {| class="wikitable |- ! Name ! P..."

New page

The file system used on the Xbox is [[FATX]], a variant of FAT16/32 developed by Microsoft specifically for the Xbox.

== Implementations ==

{| class="wikitable
|-
! Name
! Platform
! Read/Write
! Description
|-
| Official
| Xbox
| Read/Write
| Official FATX implementation by Microsoft
|-
| [https://github.com/mborgerson/fatx fatxfs]
| GNU/Linux, macOS
| Read-Only
| [https://en.wikipedia.org/wiki/Filesystem_in_Userspace FUSE]-based implementation
|}

== Further Reading ==
* [http://hackipedia.org/Disk%20formats/File%20systems/FATX%2C%20File%20Allocation%20Table%20%28X-Box%29/Differences_between_Xbox_FATX_and_MS-DOS_FAT.htm Differences between Xbox FATX and MS-DOS FAT]

← Older revision		Revision as of 04:08, 27 October 2025
Line 2:		Line 2:

	The [[Config Sector]] contains the filesystem magic number, some basic filesystem metadata, and Xbox Live account information.		The [[Config Sector]] contains the filesystem magic number, some basic filesystem metadata, and Xbox Live account information.
		+
		+	== Header ==
		+	The header for FATX is similar to FAT12/16/32 but heavily trimmed down. The following parts are known:
		+
		+	{\| class="wikitable"
		+	\|-
		+	! Offset
		+	! Length
		+	! Contents
		+	! Notes
		+	\|-
		+	\| 0x0
		+	\| 0x4
		+	\| Magic value ("FATX")
		+	\| ASCII encoded.
		+	\|-
		+	\| 0x4
		+	\| 0x4
		+	\| Serial of partition
		+	\| Created using Xbox RTC, unknown if this must be unique to mount.
		+	\|-
		+	\| 0x8
		+	\| 0x4
		+	\| Cluster size
		+	\| The number of 512 byte chunks one cluster requires. Typically 32 on the internal HDD, 4 on [[Xbox Memory Unit\|XMUs]].
		+	\|-
		+	\| 0xC
		+	\| 0x4
		+	\| Directory/FAT cluster count
		+	\| Typically 1, unknown if more are supported as in FAT12/16/32.
		+	\|-
		+	\| 0x10
		+	\| 0x40
		+	\| Partition name
		+	\| UTF-16le encoded name for a partition. Must be double-zero padded. Used to name XMUs, adding one to the internal HDD does nothing visible in stock firmware, but is retained. Untested on temporary partitions.
		+	\|}

	== Implementations ==		== Implementations ==

← Older revision		Revision as of 05:38, 3 July 2022
Line 1:		Line 1:
	The file system used on the Xbox is [[FATX]], a variant of FAT16/32 developed by Microsoft specifically for the Xbox.		The file system used on the Xbox is [[FATX]], a variant of FAT16/32 developed by Microsoft specifically for the Xbox.
		+
		+	The [[Config Sector]] contains the filesystem magic number, some basic filesystem metadata, and Xbox Live account information.

	== Implementations ==		== Implementations ==

@@ Line 24: / Line 24: @@
 * Most up to date: [https://hackmd.io/DXo0p8VnQLy3XQ7YR1Ny_w?view The FATX filesystem]
 * Archive of the xbox-linux project from 2010: [https://web.archive.org/web/20100617022009/http://www.xbox-linux.org/wiki/Differences_between_Xbox_FATX_and_MS-DOS_FAT Differences between Xbox FATX and MS-DOS FAT]
-* An [older version of that document http://web.archive.org/web/20040616143741/http://www.xbox-linux.org/docs/hdpartfs.html] including info about unknown (XBLA?) config sectors
+* An [http://web.archive.org/web/20040616143741/http://www.xbox-linux.org/docs/hdpartfs.html older version of that document] including info about unknown (XBLA?) config sectors
 * Private writings from 2002: [https://web.archive.org/web/20020617181617/http://www.tardis.ed.ac.uk:80/~lucien/computing/projects/xbox/XBOX-disk-layout.htm XBOX DISK LAYOUT v0.13]

@@ Line 24: / Line 24: @@
 * Most up to date: [https://hackmd.io/DXo0p8VnQLy3XQ7YR1Ny_w?view The FATX filesystem]
 * Archive of the xbox-linux project from 2010: [https://web.archive.org/web/20100617022009/http://www.xbox-linux.org/wiki/Differences_between_Xbox_FATX_and_MS-DOS_FAT Differences between Xbox FATX and MS-DOS FAT]
-* An older version of that document including info about unknown (XBLA?) sectors [http://web.archive.org/web/20040616143741/http://www.xbox-linux.org/docs/hdpartfs.html]
+* An [older version of that document http://web.archive.org/web/20040616143741/http://www.xbox-linux.org/docs/hdpartfs.html] including info about unknown (XBLA?) config sectors
 * Private writings from 2002: [https://web.archive.org/web/20020617181617/http://www.tardis.ed.ac.uk:80/~lucien/computing/projects/xbox/XBOX-disk-layout.htm XBOX DISK LAYOUT v0.13]

@@ Line 24: / Line 24: @@
 * Most up to date: [https://hackmd.io/DXo0p8VnQLy3XQ7YR1Ny_w?view The FATX filesystem]
 * Archive of the xbox-linux project from 2010: [https://web.archive.org/web/20100617022009/http://www.xbox-linux.org/wiki/Differences_between_Xbox_FATX_and_MS-DOS_FAT Differences between Xbox FATX and MS-DOS FAT]
 * Private writings from 2002: [https://web.archive.org/web/20020617181617/http://www.tardis.ed.ac.uk:80/~lucien/computing/projects/xbox/XBOX-disk-layout.htm XBOX DISK LAYOUT v0.13]

@@ Line 22: / Line 22: @@
 == Further Reading ==
-* [https://web.archive.org/web/20100617022009/http://www.xbox-linux.org/wiki/Differences_between_Xbox_FATX_and_MS-DOS_FAT Differences between Xbox FATX and MS-DOS FAT]
+* Most up to date: [https://hackmd.io/DXo0p8VnQLy3XQ7YR1Ny_w?view The FATX filesystem]
-* [https://web.archive.org/web/20020617181617/http://www.tardis.ed.ac.uk:80/~lucien/computing/projects/xbox/XBOX-disk-layout.htm XBOX DISK LAYOUT v0.13]
+* Archive of the xbox-linux project from 2010: [https://web.archive.org/web/20100617022009/http://www.xbox-linux.org/wiki/Differences_between_Xbox_FATX_and_MS-DOS_FAT Differences between Xbox FATX and MS-DOS FAT]

← Older revision		Revision as of 11:12, 27 December 2018
Line 23:		Line 23:
	== Further Reading ==		== Further Reading ==
	* [http://hackipedia.org/Disk%20formats/File%20systems/FATX%2C%20File%20Allocation%20Table%20%28X-Box%29/Differences_between_Xbox_FATX_and_MS-DOS_FAT.htm Differences between Xbox FATX and MS-DOS FAT]		* [http://hackipedia.org/Disk%20formats/File%20systems/FATX%2C%20File%20Allocation%20Table%20%28X-Box%29/Differences_between_Xbox_FATX_and_MS-DOS_FAT.htm Differences between Xbox FATX and MS-DOS FAT]
		+	* [https://web.archive.org/web/20020617181617/http://www.tardis.ed.ac.uk:80/~lucien/computing/projects/xbox/XBOX-disk-layout.htm XBOX DISK LAYOUT v0.13]