Under sysfs, FC has a generic transport layer fc_host and a SCSI protocol driver scsi_host. SAS has the same SCSI protocol but there is no generic transport so you only have what all SCSI ports provide. For example, the state of the port:
Code:
cat /sys/class/scsi_host/host2/state
running
Disks connected to host port 2:
Code:
ls /sys/class/scsi_disk/2:*