[dm-crypt] Fwd: Cannot wipe header on device

Luís de Sousa luis.a.de.sousa at gmail.com
Fri Dec 11 15:56:10 CET 2015

On 11 December 2015 at 15:34, Milan Broz <gmazyland at gmail.com> 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

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.

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