magic update usbkey
sridhar at laptop.org.au
Thu Feb 10 08:57:59 EST 2011
On 11 February 2011 00:26, Martin Langhoff <martin.langhoff at gmail.com> wrote:
> On Thu, Feb 10, 2011 at 1:09 AM, Sridhar Dhanapalan
> <sridhar at laptop.org.au> wrote:
>> We're also using a olpc.fth file to make some other things easier for
>> teachers. Since our XOs are developer unlocked, there's nothing
> Intriguing. What do you do with an olpc.fth that a teacher would need?
We wanted to allow teachers to easily:
1. upgrade the firmware
2. get our filesystem deployment key (skey) onto the XOs
3. install our signed OS image
4. NANDblast the image to other XOs (nb-secure)
The file structure on the USB drive looks like this:
| |-- bootfw.zip
| |-- olpc.fth
| `-- s.pub
Step 1 is already handled by placing bootfw.zip into /boot on a USB
drive. The others are handled by olpc.fth.
If you insert the USB drive into the XO and power-on, it will:
1. install the firmware, then reboot
2. install the skey (s.pub), then reboot
On the next reboot, the user gets a menu:
Security key already installed.
Press 1 to write the fs.zd operating system image from the USB drive
to the XO.
Press 2 to start a NANDblaster broadcast of the signed fs.zd
operating system image from the USB drive.
Press any other key to power off the XO.
Then the teacher can pick 1 to flash their own XO. After the reboot,
they can pick 2 to start nb-secure.
On the children's XOs, you use the same USB stick to upgrade the
firmware and install the skey. As early adopters of the XO-1.5s, we
have many XOs that don't have NANDblaster-capable firmware. Then turn
them on again with the four game keys held to put them into
NANDblaster receive mode.
This is being developed at:
More information about the Devel