XO-1.5 users: need your SD card data

Daniel Drake dsd at laptop.org
Thu Apr 14 12:26:29 EDT 2011


I may have found a way to make fs-update run on steroids. But I need
to know if all/most SD cards are like mine.

Please open your XO-1.5 and run:

cat /sys/devices/pci0000:00/0000:00:0c.0/mmc_host/mmc2/mmc2:*/scr

And post the output here.
Please state clearly if this is a SD card that you installed yourself,
or if its the one that was shipped in the laptop by default from OLPC.

The optimization I'm looking at is that fs-update first erases the
disk (which only takes a split second) and then spends most of its
time writing zeroes, but for some SD cards (hopefully most of them),
erasing the disk zeroes out the whole thing anyway. So no need to
spend loads of time writing zeroes.


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