[Arm-netbook] CT-PC89E - success replicating boot from SDcard with switch in NON-factory-default setting

[Adam Gill]

so what's different with this that what i was trying to boot last nite?

Luke Kenneth Casson Leighton wrote:
> On Wed, Mar 24, 2010 at 1:17 PM, Adam Gill <madallig at gmail.com> wrote:
>   
>> are you saying now i can recover my machine ...?
>>     
>
>  yes as long as it's not damaged.  follow the instructions below, as a
> first test.  perform the three commands (actually you only need the
> one - the dd command - because you already have the copy bunzip'd 96mb
> file).
>
> l.
>
>   
>> Luke Kenneth Casson Leighton wrote:
>>
>> you MUST use a 2gb SDcard for this to work, so if you use fdisk, it
>> must show the same params as here:
>>
>> # fdisk /dev/mmcblk0
>>
>> Command (m for help): p
>>
>> Disk /dev/mmcblk0: 1977 MB, 1977614336 bytes
>> 61 heads, 62 sectors/track, 1021 cylinders
>> Units = cylinders of 3782 * 512 = 1936384 bytes
>>
>>
>> if you have exactly that, then the following will work.
>>
>> # wget http://lkcl.net/arm_systems/CT-PC89E/mmblk0p1.bz2
>> # bunzip2 mmcblk0p1.bz2
>> # dd if=/opt/cross-tools/mid-linux/
>> mmcblk0p1 of=/dev/mmcblk0 seek=3672000 bs=512
>>
>>
>> you can basically do that _without_ formatting the SDcard.  no
>> partitions required, nothing, because the hardware actually reads
>> directly from the SD card.
>>
>> the only reason for creating the "top" partition is for safety
>> reasons, to make sure that nobody overwrites the u-boot, kernel etc.
>>
>> but - fuckit.  if you want to do a quick test, grab the copy of
>> mmcblk0p1 which someone made (teis?  can't remember) a while back,
>> shove it on the 2gb SD card, and go.
>>
>> this is _extremely_ good news, because it means that it's now possible
>> to a) safely begin reverse-engineering u-boot b) safely recover any
>> bricked machine
>>
>> l.
>>
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>>     
>
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