User's Manual

Developer and Recovery mode

Table 22. Developer and Recovery mode

Developer Mode Recovery Mode

• Used to boot without verication.

• Can be turned on via key combination during boot.

• Stateful partition is wiped during transitions.

• Used in the factory to boot test image.

• Allows a user to reinstall the Chrome OS from a USB key or SD

card.

• Recovery mode is entered if veried boot fails.

• A user can force recovery mode via a key combination during

boot.

Coreboot and U-boot Custom Firmware

Coreboot (x86 only)

• Memory and chipset initialization

• Open-source, except for MRC binary from Intel.

U-Boot

• Performs veried boot

• Handles recovery and Developer Mode

• Open source code

Normal boot is very fast, as it takes less than 1 second to start loading kernel. Chromebook does not boot other operating systems such as

Windows or OS X.

Software