On Jun 8, 2013, at 6:42 PM, André Schlichting <andre@xxxxxxxxxx> wrote: > > I'm not sure, but this external disk has a GPT with sector size 4096 and as I wrote the dm-crypted LUKS container can be opened without complains. > > fdisk -l /dev/sdc > WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion. > > Disk /dev/sdc: 3000.6 GB, 3000592982016 bytes, 732566646 sectors > Units = Sektoren of 1 * 4096 = 4096 bytes > Sector size (logical/physical): 4096 bytes / 4096 bytes Ahh, one of the new 4kN drives, interesting. So in that case bs=4096 is OK. The next issue: >> if=/dev/sdc2 skip=$((245547520-33024)) seek=0 of=/dev/sdc2 You have a skip (skip n block from input) value well inside of sdc2. It seems you should have skipped from sdc not sdc2, and should have used the old start value for sdc2 which was just 245547520, and you needed to specify a count value in order to get the correct number of blocks, which would have been 732566527-245547520. Then write those blocks to sdc2 (which makes seek= unnecessary). Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
