Forewarning.. don't do what he suggested without first backing up your data. I've never used sfdisk but it strongly smells like a command to create an unusable card. (You're a real a**hole, epitaph.) I suggest, instead, backing up all your contents and reading this: https://garage.maemo.org/plugins/wik...id=1382&type=g also http://wiki.maemo.org/Repartitioning_the_flash He's covering how to restore the internal memory--but it should give you hints on how to figure out partitioning your mmcblk1 (SD card). You're welcome.
#!/bin/sh sfdisk /dev/mmcblk1 << EOF 0,,0b EOF