[olpc-help] SD cards KNOWN to work in XO?

[Doug Jones]

I have now had a chance to play with multiple partitions on an SDHC card.

I used a 16GB SDHC card from A-Data.

I made two partitions on it, of roughly equal size.  The first is ext3, 
flagged bootable.  The second is FAT32.

(I didn't do this on the XO.  I used a desktop machine, booted from a 
GParted LiveCD 0.3.4-8.  The biggest stumbling block was finding a USB 
camera card adapter that was compatible with SDHC  --  the dozens of 
adapters available at Frys did not include a single model that could do 
SDHC, but the two models I found at Target both worked!!    :-)


After partitioning, I inserted the card into the XO.  Both partitions 
mounted automatically, and I can copy files back and forth between them 
from the command line.

The Journal cannot see the ext3 partition.  But it does see the FAT32 one.

(This does not make sense to me...   Why would they make a Linux-based 
file manager that cannot see an ext3 partition???)


I have made no attempt to put a bootable OS on the card.



Doug Jones wrote:
> quixote wrote:
>> We need a hardware compatibility list for SD cards, please!  I've had 
>> lots of troubles with cards, and I see scattered reports of others 
>> with similar problems.  Can anyone answer the following?  Or point me 
>> to the wiki page?  I can't find a summary anywhere of what works and 
>> what doesn't.
>>
>> Which SD cards have been successfully used in XOs? 
>> Which High Capacity cards are currently working?
>>
>> Which of the above cards have been formatted to ext3, not vfat, and 
>> work without a hitch?
>>
>> Has anyone successfully partitioned a SDHC card into an ext3 (linux 
>> boot) partition and a vfat (data) partition?  If yes, what make and 
>> model of card was it??
>>
>> I've seen a report that the A-Data 16GB works.  Anyone second that?
> 
> 
> I can't second that, because I'm the one who reported it first.
> 
> This card is still in my XO, and works fine.  df -h reports size = 15G. 
>  mount reports it is vfat.
> 
> I have never tried to re-partition it, but am willing to try.
> 
> Will report back shortly.
> 
>