The primary operating system known as the Host OS is responsible for managing the virtual machines, providing drivers for hardware components and more. It was based on a variation of Windows 8 LNM, a stripped down operating system for bare minimum requirements, with many customisations that implement Microsoft's Xbox Virtual Machine stack.
|Internal Flash||F:\||The flash does not contain a normal file system, it is using the Xbox boot filesystem and is exposed as a normal NTFS partition via a special driver.|
|host.xvd||C:\||Host's Windows Installation.|
|User Content||E:\||Direct access to the HDD User Content partition. XVCs are stored here.|
|System Update||R:\||Direct access to the HDD System Update partition. Boot slots and SystemOS XVDs.|
|System Support||G:\(?)||Direct access to the HDD System Support partition. Containing SystemOS's settings, temp, etc.|
The System OS is built to provide the main visual and interactive layer of the console. This operating system is currently based on Windows 'OneCoreUAP' with a custom shell, services and other components.
|File Name||Mount Point||Dev-Only||Read-Only||Desc|
|settings-saved.xvd||S:\||false||false||Console settings data. (Licenses, prefetch, registry and more)|
|systemmisc.xvd||M:\||false||true||Miscellaneous system boot files.|
|user.xvd||U:\||false||false||User and application data.|
|user-devkit.xvd||U:\||true||false||User and application data.|
The Game operating system is used exclusively for games that target the XDK due to the higher allocation of console resources. It is built upon the same variant of Windows 8 LNM as the Host OS but is essentially smaller and more efficient.
|File Name||Mount Point||Notes|
|ERA.xvd||C:\||GameOS's Windows installation. Packaged with games via the XVC's user data. Attempts to read from this partition will result in the hypervisor terminating the ERA VM.|
|Game.XVC||G:\||Running game's binaries/data. The XVC mounted and decrypted.|
|ERATools.xvd||J:\||(MS Internal (and ERA Test?) Devkits with XDK recoveries only). Contains tools like ipconfig, telnetd, debug support dlls and dlls needed to connect to the XDK via the XB CLI tools.|
A new operating system that currently appears to be the new foundation for games developed on Windows 10 devices. Based on a 'headless' Windows Core OS (WCOS).