> 
> When scsi disk is runtime suspended, the ata port it attached to will be
> runtime suspended, and then the power will be removed through ACPI.
> 
> Please check libata-acpi.c, function ata_acpi_set_state.
> 
> The parent/child relationship of the devices:
> ata_host
>   ata_port
>     scsi_host
>       scsi_target
>         scsi_device
> 
> If you have more questions on how it works, please send email only
> to me, other people might be too busy to read such emails :-)
> 
> Thanks,
> Aaron
[Jack Wang] Thanks, but as I read code, only SATA disk will attached to ata
port, how about SAS disk or FC disk?

I still copy to other people as James suggested :)


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