Andreyg: /* Forcing fastboot mode */

2015-09-21T08:55:48Z

‎Forcing fastboot mode

Nadav: New page: = Overview = Fastboot is a protocol and associated utility, used primarily to modify flash file system while the device is in a bootloader. Fastboot operates via USB OTG. In addition to th...

2014-08-07T12:01:04Z

New page: = Overview = Fastboot is a protocol and associated utility, used primarily to modify flash file system while the device is in a bootloader. Fastboot operates via USB OTG. In addition to th...

New page

= Overview =
Fastboot is a protocol and associated utility, used primarily to modify flash file system while the device is in a bootloader. Fastboot operates via USB OTG. In addition to the bootloader implementing the fastboot protocol, fastboot client utility must be installed on user's workstation.

= Getting Fastboot =
In general fastboot utility is provided within the [http://developer.android.com/sdk/index.html Android SDK]. Also some Linux disributions provide fastboot within their package repositories.
For example, on Ubuntu platform, fastboot may be obtained via {{parameter|android-tools-fastboot}} package.

= Useful commands =
* List connected devices
<pre>
$ fastboot devices
</pre>
* Reboot device
<pre>
$ fastboot reboot
</pre>
* Flash image file onto partition identified by its name, e.g. ''boot''
<pre>
$ fastboot flash boot boot.img
</pre>
* Boot device, loading ''boot.img'' from the PC workstation, instead of boot partition
<pre>
$ fastboot boot boot.img
</pre>

= See Also =
* [http://wiki.cyanogenmod.org/w/Doc:_fastboot_intro Fastboot introduction]

[[Category:Android|Fastboot setup]]

@@ Line 1: / Line 1: @@
 = Overview =
-Fastboot is a protocol and associated utility, used primarily to modify flash file system while the device is in a bootloader. Fastboot operates via USB OTG. In addition to the bootloader implementing the fastboot protocol, fastboot client utility must be installed on user's workstation.
+Fastboot is a protocol and associated utility, used primarily to modify flash file system while the device is running a bootloader. Fastboot operates via USB OTG. In addition to the bootloader implementing the fastboot protocol, fastboot client utility must be installed on user's workstation.
 = Getting Fastboot =
@@ Line 7: / Line 7: @@
 = Useful commands =
-* List connected devices
+* List connected devices <pre>$ fastboot devices</pre>
-<pre>
+* Reboot device <pre>$ fastboot reboot</pre>
-$ fastboot devices
+* Flash image file onto partition identified by its name, e.g. ''boot'' <pre>$ fastboot flash boot boot.img</pre>
-</pre>
+* Boot device, loading ''boot.img'' from the PC workstation, instead of boot partition <pre>$ fastboot boot boot.img</pre>
 * Reboot device
-<pre>
+= Forcing fastboot mode =
-$ fastboot reboot
+Normally a bootloader will proceed to booting a valid boot partition. In case there is none, the bootloader will fall back into fastboot mode.<br/>
-</pre>
+There are a few options to force fastboot mode despite valid boot partition:
-* Flash image file onto partition identified by its name, e.g. ''boot''
+* By rebooting to fastboot mode. Issue on either workstation <pre>$ adb reboot bootloader</pre> or Android device itself <pre># reboot bootloader</pre>
-<pre>
+* By powering up while pressing the '''boot select''' button.
-$ fastboot flash boot boot.img
+* By invalidating boot partition. Destroy boot partition signature, issuing on the device (in either Linux or Android command line): <pre># dd if=/dev/zero of=/path/to/boot/partition bs=1 count=1</pre>
-</pre>
+{{Note | path-to-boot-partition may be, e.g, {{filename | /dev/block/platform/msm_sdcc.1/by-name/boot}} }}
 = See Also =

Android: Fastboot setup - Revision history

Andreyg: /* Forcing fastboot mode */

Nadav: New page: = Overview = Fastboot is a protocol and associated utility, used primarily to modify flash file system while the device is in a bootloader. Fastboot operates via USB OTG. In addition to th...