can one "dd" XO-1.5 internal microSD cards, to another XO-1.5?

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can one "dd" XO-1.5 internal microSD cards, to another XO-1.5?

Adam Holt-2
James & All,

Will it work if one extricates an XO-1.5's internal microSD card and then places it inside another XO-1.5?

e.g. allowing an Ace Teacher to make her own customized images offline in Haiti, with the power of a screwdriver, then simply re-assembling her very small collection of XO-1.5's after the "dd" duplication of microSD's is done.

If this works, I will ask her to run "rm -rf /home/olpc/.sugar" first, in order to delete all personal info on the master/template laptop, if she really cares!  Context for this potential Lifesaver: the Ace Teacher does not and cannot realistically use these more professional tools that we are would normally advocate for:

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Re: can one "dd" XO-1.5 internal microSD cards, to another XO-1.5?

James Cameron-2
Stripped of your superlatives, yes.

It isn't just .sugar, there's also .config.

http://wiki.laptop.org/go/Imaging/Side_effects describes the exact
steps to do before duplication.

Get it wrong and you will break collaboration of Sugar activities.

Certainly unfortunate that said Ace Teacher isn't Ace enough to find
or develop expertise.

The microSD card connector has a limited life, as does the display
cable, so I'm all for opening and closing it many times so you have to
buy new laptops!  ;-)  Better would be to use SD cards.

On Mon, Feb 19, 2018 at 05:10:58PM -0500, Adam Holt wrote:

> James & All,
>
> Will it work if one extricates an XO-1.5's internal microSD card and then
> places it inside another XO-1.5?
>
> e.g. allowing an Ace Teacher to make her own customized images offline in
> Haiti, with the power of a screwdriver, then simply re-assembling her very
> small collection of XO-1.5's after the "dd" duplication of microSD's is done.
>
> If this works, I will ask her to run "rm -rf /home/olpc/.sugar" first, in order
> to delete all personal info on the master/template laptop, if she really cares!
>   Context for this potential Lifesaver: the Ace Teacher does not and cannot
> realistically use these more professional tools that we are would normally
> advocate for:
>
> [1]http://wiki.laptop.org/go/OS_Builder
> [2]http://wiki.laptop.org/go/Tiny_Core_Linux
> [3]http://wiki.laptop.org/go/Customization_stick (deprecated!)
>
> References:
>
> [1] http://wiki.laptop.org/go/OS_Builder
> [2] http://wiki.laptop.org/go/Tiny_Core_Linux
> [3] http://wiki.laptop.org/go/Customization_stick

> _______________________________________________
> Devel mailing list
> [hidden email]
> http://lists.laptop.org/listinfo/devel


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Re: can one "dd" XO-1.5 internal microSD cards, to another XO-1.5?

Hal Murray-2
In reply to this post by Adam Holt-2
> Better would be to use SD cards.

The original goal was to copy microSD cards.

Would it be reasonable to copy microSD to SD, move the SD card to the target
XO, and then copy SD to microSD?  I expect an OpenFirmware wizard could do it
with no effort but I'm not that level of wizard.

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Re: can one "dd" XO-1.5 internal microSD cards, to another XO-1.5?

James Cameron-2
On Mon, Feb 19, 2018 at 10:13:51PM -0800, Hal Murray wrote:
> > Better would be to use SD cards.
>
> The original goal was to copy microSD cards.

Yes, but original goal unwise; it will damage the microSD card
connector and display cable.  At this stage of life there is
contact oxidation, spring tension reduction, and brittle polymers.

I've observed these in my test units that have had way less use than
units in the hands of children.

> Would it be reasonable to copy microSD to SD, move the SD card to
> the target XO, and then copy SD to microSD?  I expect an
> OpenFirmware wizard could do it with no effort but I'm not that
> level of wizard.

No, not really.

An order of magnitude faster to use Linux to copy, as it can do
asynchronous I/O.  Open Firmware only does asynchronous I/O during
fs-update.

To access my wizardry, use the tools we have refined and kept running
for years, or get me to do it.  Can also sign the build; overcomes the
next common problem; locked laptops.

The .zd format and fs-update is the fastest method to bulk load the
microSD card without having to remove and replace it.

A clone can be made with Linux, then converted to .zd using the
zhashfs program.

There is also rsync from a teacher laptop, see
http://wiki.laptop.org/go/Tiny_Core_Linux/Reversion

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http://quozl.netrek.org/
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