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[Solved] Possible to boot from SD MMC?
https://powerdeveloper.org/forums/viewtopic.php?f=7&t=2207		 Page 1 of 1
Author:  kurtis [ Tue Mar 13, 2012 8:08 am ]
Post subject:  [Solved] Possible to boot from SD MMC?
Hey Guys/Girls,

Is it possible to boot from the "external" SD MMC Card on the Efika MX? Specifically, the port that's on the side of the laptop as opposed to the battery bay.

I don't have a standard SD Card on-hand so I'm trying to use one of these Class 10 cards to install Debian.

Thanks!
Author:  PurpleAlien [ Tue Mar 13, 2012 9:41 am ]
Post subject: 
IGNORE THIS POST - READ BELOW

Hi.

No, you can't boot from that one. Your best choice would be to get a simple adapter (it often comes with those cards) like this:

http://au.sandisk.com/Assets/File/Downl ... dapter.jpg


Johan.
Author:  kurtis [ Tue Mar 13, 2012 9:48 am ]
Post subject:  Thanks!
Thanks for the quick reply!

I'm actually going from a larger card (MMC SD) to a smaller slot (MicroSD Slot) so I'm not sure if an adapter will do the job.

A MicroSD card doesn't cost too much. I'll just go ahead and grab one.

I appreciate the help!
Author:  PurpleAlien [ Tue Mar 13, 2012 10:47 am ]
Post subject: 
Hi.

Sorry, I misread your original post. The SD slot on the side of the netbook is the boot-able one. It's the internal one (behind the battery, microSD) that can't be booted from.


Johan.
Author:  kurtis [ Tue Mar 13, 2012 10:58 am ]
Post subject: 
That's good news! I'm glad to hear I didn't waste my money :)

Anyways, my system didn't boot from the external SD Card. It loaded my installed System (Ubuntu).

I created the SD Card using this process:

1. Downloaded

http://www.powerdeveloper.org/asset/by-id/126

2. Extracted and Copied.
Code:
xzcat efika-armhf+3d-20110925.img.xz > efika.img
sudo umount /media/58AF-5497/
sudo dd if=/home/kurtis/Downloads/efika.img of=/dev/sdb1 bs=1M
3. Inserted SD Card and Restarted.

Any suggestions on what I might have done wrong? Thanks again!
Author:  PurpleAlien [ Tue Mar 13, 2012 5:29 pm ]
Post subject: 
Hi.

Make this:
Code:
sudo dd if=/home/kurtis/Downloads/efika.img of=/dev/sdb1 bs=1M
into:
Code:
sudo dd if=/home/kurtis/Downloads/efika.img of=/dev/sdb bs=1M

Johan.
Author:  kurtis [ Tue Mar 13, 2012 7:21 pm ]
Post subject:  Works great!
PurpleAlien, thanks for your help! It booted up and looks like it'll run great.

One thing that took some luck and Google was the Username/Password combination. It's root/efika in case anybody else comes across this problem.
Author:  Neko [ Wed Mar 14, 2012 11:01 am ]
Post subject: 
Quote:
Hi.

Sorry, I misread your original post. The SD slot on the side of the netbook is the boot-able one. It's the internal one (behind the battery, microSD) that can't be booted from.
There's no reason you can't boot from battery slot either; U-Boot will check both slots (battery slot first) but there are a few issues with the microSD slot with regards to power supply (it only does 3.15V and not the full 3.3V) which means some bigger cards (8GB, 16GB..) just don't work.

The real problem is going to definitely be finding a card that will "work" within U-Boot, but not a fundamental impossibility.
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