On 12/11/2015 03:56 PM, Luís de Sousa wrote: > On 11 December 2015 at 15:34, Milan Broz <gmazyland@xxxxxxxxx> wrote: >> >> Could you please try to add to dd command: oflag=direct and try it again? >> > > Same result (see below). Thanks for helping in any case. > > $ sudo dd if=/dev/zero of=/dev/sdb1 bs=4096 count=2500 conv=sync oflag=direct > 2500+0 records in > 2500+0 records out > 10240000 bytes (10 MB) copied, 1.59072 s, 6.4 MB/s > > $ sudo cryptsetup -y -v luksFormat /dev/sdb1 > > WARNING! > ======== > This will overwrite data on /dev/sdb1 irrevocably. > > Are you sure? (Type uppercase yes): YES > Enter passphrase: > Verify passphrase: > Cannot wipe header on device /dev/sdb1. > Command failed with code 5: Cannot wipe header on device /dev/sdb1. Interesting... probably some hw issue, anyway could you please send me (not to the list) strace and that command with debug information? IOW cryptsetup -y luksFormat /dev/sdb1 --debug strace cryptsetup -y luksFormat /dev/sdb1 please do not use valuable password, it will be visible in the second output. Milan _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt