On 07/12/17 17:40, Andreas Klauer wrote:

On Thu, Dec 07, 2017 at 02:58:32PM +0100, Andreas Klauer wrote:

quoted

Perhaps it's an intermittent error specific to your smartctl version?

Looking at the source code, it seems to be a case of:

    sct supported, erc unsupported - exit 4 (fail)

That's fine - fail is detected, kernel timeout is set to 180

    sct unsupported as a whole     - exit 0 (success)

WHOOPS. Setting erc fails, so the command reports success!

So some drives will give the wrong exit code for this command.

Should probably be reported as a bug to smartmontools.

Sounds about right.

Cheers,
Wol