Operating system image installation methods
We use a few different methods to install operating system images.
|installation method||what files are required||how to install||references|
|block signed||.zd and fs.zip||hold down the four game pad buttons||Release notes|
|block unsigned||.zd alone||check if security is disabled, if so obtain developer key and disable-security, interrupt boot, then use the fs-update command||Release notes|
|nand signed||.img and fs.zip||hold down the four game pad buttons||Release notes Clean Install Procedure Nandblaster_for_XO-1|
|nand unsigned||.img and .crc||obtain developer key, disable-security, interrupt boot, then use the copy-nand command||Release notes Clean Install Procedure Nandblaster_for_XO-1|
| nand partitioned||.dat and .img||obtain developer key, disable-security, interrupt boot, then use the update-nand command||Used by DebXO. Used by UBIFS experiments. See also Technical description.|
The signed installation methods are the same for XO-4, XO-1.75, XO-1.5 and XO-1. This was by design, since we do not wish to increase the training burden for the deployment teams.
The unsigned installation methods depend on the type of internal storage. XO-1 has raw NAND Flash. XO-1.5, XO-1.75 and XO-4 have microSD or eMMC managed Flash.
See also Firmware/Storage.