View source for Clean-install procedure for 8.2

''The excellent instructions on this page are still valid for 8.2.1, but have not been updated for later releases (instructions can be found in the newer [[release notes]]).  Writers are needed to adjust these instructions for XO-1 and XO-1.5 on the new releases. ''<br>

{{Deprecated |<center><br/> '''For recent instructions, see the <big>[[Release notes]]</big> for the release you are installing.'''</center>}}
This page provides parallel instructions for installing both signed builds (official or candidate releases) and unsigned development builds for [[Friends in Testing]].

Note that a clean install will reflash your XO; '''everything you created will be deleted.''' See [[olpc-update]] for an update mechanism that preserves some data.

== What version is available? ==
<!-- Section copied from [[olpc-update]], keep the two pages in sync -->
You need to identify the "build" to which you want to update your system.
The latest stable system software release is
: {{Latest_Releases/stable}}
Most users should update to that build.

'''For 2008 G1G1 users, [[Release_Notes/8.2.0#If_your_XO_is_not_connected_to_the_internet|the 8.2.0 release notes]] offer the most concise instructions for restoring the factory configuration.'''

All releases currently available are listed on the [[Release notes]] page.
Before upgrading to any release, read its [[release notes]] carefully.

===Other builds===
There are later builds in various stages of development, see [[OS images]] for more background.
These are likely to be unstable and you will probably need to request a [[developer key]] to install them.

== Official releases and candidate builds ==
{{users}}
[[Image:YamaDone.JPG|thumb|''for new users'' [[USB_update|<br>'''illustrated guide to updating using a USB stick<br>''']]]]

<!-- The USB flash drive requirements are in common with other pages -->
You'll need a USB storage device such as a flash drive, with a capacity of 500 MB or higher.  It should be formatted as FAT or FAT32, and only contain one partition.  Most ordinary USB flash drives are set up this way, except "U3" flash drives which may not work.  Remove U3 with uninstall software from http://www.u3.com/uninstall or http://u3uninstall.s3.amazonaws.com/U3Uninstall.exe

# Attach the USB storage device to your local (NOT the XO!) computer.
# Perform a clean (Full, not Quick!) format of the USB storage device.
# Download the OS image named <tt>''someversion''.img</tt> (e.g. <tt>gg-802-1.img</tt>) and the signature file <tt>fs.zip</tt> to the USB storage device. These are compressed files, but DO NOT open them &mdash; in your browser click the right mouse button over the link and choose "Save Link/Target As...".
#* For release 8.2.1 with activities included, use gg-802-1.img and fs.zip from<br>http://download.laptop.org/xo-1/custom/g1g1/gg-802-1/
#* For release 8.2.0 with activities included, use gg-767-4.img and fs.zip from<br>http://download.laptop.org/xo-1/custom/g1g1/gg-767-4/
#* For other releases without activities included, see subdirectories of<br>http://download.laptop.org/xo-1/os/official/ 
# Your USB storage device should now contain two files (in the root) named something like: <tt>gg-802-1.img</tt> and <tt>fs.zip</tt>. 
# Unmount the USB storage device and disconnect it from your computer when it is safe to do so.
# Plug your XO laptop into an electrical outlet and make sure the battery is locked in place.
# [[Shutdown]] the XO.
# [[Image:Power-button.jpg|thumb|right|Power & Game buttons for B2 and older XOs.  B3 and newer have "O" at the top and "✓" (check) at the right.]] Connect the USB storage device to the XO Laptop and power up while holding all the four game keys. (this is VERY important!)
# Release the game keys when the XO asks you to. The XO will take a few minutes to rewrite its memory with the new OS image. 
# [[Reboot]] the XO.  If the new build includes newer [[firmware]], then your XO will reboot twice. When the XO restarts the update will be complete. 
# Check that the XO has the correct build loaded:
#* Follow [[How to check the OS and firmware versions]].
#* Verify that the build number matches build number of the image file you downloaded, e.g. "Update.1 708, firmware Q2D16" for en708-1.
# You may then need to [[Activity installation|install activities]].

== Development builds ==
{{developers}}

* Read [[OS images]] and its table of releases to choose an appropriate build.
** ''Other OS images can be found at [http://xs-dev.laptop.org/~cscott/xo-1/streams/joyride/ joyride build stream] (e.g. [http://xs-dev.laptop.org/~cscott/xo-1/streams/joyride/build2230/devel_jffs2/ joyride-2230]) and from many other sources.''
* Download the OS image (e.g. {{{{:Friends in testing/current image stream}}-img-link}}) and its CRC file (e.g. {{{{:Friends in testing/current image stream}}-crc-link}}) to your local computer.
**Important: DO NOT open these links just by clicking on them.
**If your computer runs MS Windows, click your right mouse button on the link and choose "Save Link Target As".
**If you are using a Mac, use Safari for the downloads and hold down the control key when you click on the link and choose "Download linked file as..."
**Firefox will also work, use "Save Link As...").
* Prepare a clean (Full (not Quick!) formatted) USB flash drive.
* Get a [[Developer_key#Getting_a_developer_key_for_your_running_XO_laptop|developer key]] for your XO laptop and save it as <tt>develop.sig</tt> in a folder <tt>security</tt> on the USB flash drive.
* Copy the OS image files onto the USB flash drive,
**the files should be next to the security folder and not in it.
**your USB flash drive should now contain two files named, for example, <tt>os''{{:Friends in testing/current image number}}''.img</tt> and <tt>os''{{:Friends in testing/current image number}}''.crc</tt> (and possibly the <tt>/security</tt> directory).
* Unmount the USB flash drive and disconnect it from your computer when it is safe to do so.
* [[Shutdown]] the XO laptop.
* Insert the USB flash drive into the XO laptop and power up to the "ok" prompt, (see [[Ok]] for how),
* Install the image by typing
  probe-usb copy-nand disk:\os''NNN''.img
where os''NNN''.img is the file you downloaded (e.g. os2230.img, or en708-1.img).
* Press Enter, then wait while your machine reflashes.
* When the "ok" prompt returns, reboot the machine by typing:
  bye

Note: This procedure can be used for builds signed with the OLPC key. If it is used for builds signed with other keys, it is necessary to [[Developer_key#Disable_the_security_system|disable security ]] otherwise the developer key will need to be in the USB for every boot.

[[Category:Update paths]]