[smartmontools-support] Support for unrecognized USB bridge?

[Christian Franke]

Schorschi Decker wrote:
> Christian,
>
> VOX 4 disk USB enclosure.  It is SATA Disk To USB.  The lsusb output 
> is...
> Bus 002 Device 006: ID 07f7:012d Century Corp.
>
> Because it is not listed in the database , the supported or 
> unsupported list(s), I asked if it could be added.  :)

Because you didn't provide any evidence that the bridge is 
(un)supported, I asked for further info :-)


> ...
> # smartctl -a -d sat -T permissive /dev/sdb1
> smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.19.0-12-amd64] (local 
> build)
> Copyright (C) 2002-17, Bruce Allen, Christian Franke, 
> www.smartmontools.org
>
> Read Device Identity failed: scsi error unsupported scsi opcode
>
> === START OF INFORMATION SECTION ===
> Device Model:     [No Information Found]

Most modern USB to SATA bridges support SAT pass-through. This is not 
the case here.

If none of the other pass-through candidates work, this bridge is 
unsupported:
-d sat,12
-d usbjmicron
-d usbprolific
-d usbsunplus

See https://www.smartmontools.org/wiki/USB


> So it appears the specific USB bridge does not provide any visibility 
> for SMART. 

There may be some vendor specific support. Useless for us unless someone 
provides documentation or sample source code.


> Or maybe the drives themselves don't?

Even ATA IDENTIFY (Device Model, etc) is not accessible. This should 
work even if the drive does not support SMART.

Regards,
Christian