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Date: Tue, 07 Jun 2011 11:02:15 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] qemu - SCSI disk "Device Model", "Serial Number",
 and "Firmware Version"?
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To: Kevin Wolf <kwolf@redhat.com>
Cc: qemu-devel@nongnu.org, dave@seddon.ca

On 06/07/2011 10:11 AM, Kevin Wolf wrote:
> > >  SMART is only available in ATA Version 3 Revision 3 or greater.
> > >  We will try to proceed in spite of this.
> > >  SMART support is: Ambiguous - ATA IDENTIFY DEVICE words 82-83 don't show if SMART supported.
> > >                      Checking for SMART support by trying SMART ENABLE command.
> > >                      SMART ENABLE appeared to work!  Continuing.
> > >  SMART support is: Ambiguous - ATA IDENTIFY DEVICE words 85-87 don't show if SMART is enabled.
> > >  A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options
> > >  -------------------------------------------------------
> >
> >  Here we should perhaps try to improve the ATA emulation.
>
> But this is scsi-disk - what does smartctl even try here?

smartctl has to try anyway because libata shows IDE disks as /dev/sdX. 
I tried smartctl on a USB drive and it will happily run (and show no 
SMART support).

Paolo