--- In "robert.cantwell" <> wrote:
>
> Hello All,
>
> I have a TS7800 and want to back up the SD card that came with it. I had in
> mind the following steps
>
> ·boot up (from SD card)
> ·insert a micro SD card
> ·run dd if=/dev/tssdcardb of=/dev/tssdcarda
> ·remove the SD card
> ·insert a blank (formatted for ext2) SD card
> ·run dd if=/dev/tssdcarda of=/dev/tssdcardb
>
> And the inserted SD card would be the backup stashed away for safe keeping.
> But alas it has not been so simple for me. I was unable to find the micro SD
> card (I expected it at /dev/tssdcarda). So I shut down and started the whole
> process over except with a micro SD card in place, but then the SBC attempts
> to boot from the micro card and hangs indefinetly (I removed the power after
> 14 mins). I was using the TS-7800 Manual
> (http://www.embeddedarm.com/about/resource.php?item=393#section3.2) as my
> guide. Can anyone tell me how I can find where the micro device is? Do I need
> to mount the device (with or without a micro card in it) or more
> fundamentally add an appropriate module to the kernal before I proceed? Am I
> just looking in the wrong place? Thnx for any help. I am being used as a
> guinea pig to test, in particular, the ease of use of the TS7800. The catch
> is I have no embedded experience (I'm a numeric methods guy).
>
> Regards
> David C.
>
It seems you ideas of how to copy and SD card on linux have more to do with how
to copy a floppy under DOS.
You have found the dd command which is a powerful, low level command but seem
to have no understanding of how devices are handled on linux.
I would recommend you stop using it until you understand it , you can do a lot
of damage with dd!
I would suggest the first part of your guinea-pig process is to get a basic
understanding of linux.
This list is not the best place for that quest.
HTH
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