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Date: Mon, 14 Dec 2015 09:44:21 +0100
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From: =?UTF-8?Q?Lu=C3=ADs_de_Sousa?= <luis.a.de.sousa@gmail.com>
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Subject: Re: [dm-crypt] Fwd: Cannot wipe header on device
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To: Milan Broz <gmazyland@gmail.com>
Cc: dm-crypt@saout.de

On 13 December 2015 at 20:52, Milan Broz <gmazyland@gmail.com> wrote:
>
> IMHO this operation should print error as well:
>
> dd if=3D/dev/zero of=3D/dev/sdb1 bs=3D4096 count=3D1 oflag=3Dsync,direct
>
> (note sync is oflag, not conv=3D...)
>
> Anyway, this is not error in cryptsetup...
>
> Milan

Hi Milan, thank you for the reply. You can see the output below, there
is an error indeed.

I understand this is not an issue with cryptsetup, but would anyone
have suggestions on how to proceed? Is there any hope of "fixing"
this, e.g. marking this sector as unusable?

Thank you,

Lu=C3=ADs

$ sudo dd if=3D/dev/zero of=3D/dev/sdb1 bs=3D4096 count=3D1 oflag=3Dsync,di=
rect
dd: error writing =E2=80=98/dev/sdb1=E2=80=99: Remote I/O error
1+0 records in
0+0 records out
0 bytes (0 B) copied, 0.00142455 s, 0.0 kB/s