Re: Self-tests for any drive in enclosure always executed by drive in bay 0

Hagen Tronstedt wrote:
>
> Christian,
>
> Thank you for looking into this.
>
> > This looks like a subtle bug in the SAT layer of the USB bridge.
>
> That is, in the firmware of the enclosure device?
>

Yes.

> > Some (DATA IN?) commands commands are routed to the correct drive behind
>
> > the SATA port multiplier but other (NON DATA?) commands are 
> apparently not.
>
> >
>
> > Please check whether other NON DATA commands work or not. For example
>
> > change the Advanced Power Management level and then check which drive
>
> > was affected:
>
> > ...
>
> Looks like you got it right: sdb and sdc had different APM values 
> initially (128 and 192, resp.). No matter which one I set, sdb takes 
> the change (full protocoll attached).
>
> Where can we go from here?
>

Ask support of device vendor for a firmware update.

Some vendors provide updates for devices with JMS539/551, see:
https://www.smartmontools.org/ticket/552#comment:7

Regards,
Christian


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