[root@master-09:29:09 33~]#ls /sys/class/scsi_host/
host0 host1 host2
[root@master-09:29:55 34~]#echo "---" > /sys/class/scsi_host/host0/scan
-bash: echo: write error: Invalid argument
[root@master-09:30:29 35~]#echo "- - -" > /sys/class/scsi_host/host0/scan
[root@master-09:31:10 36~]#echo "- - -" > /sys/class/scsi_host/host1/scan
[root@master-09:31:17 37~]#echo "- - -" > /sys/class/scsi_host/host2/scan
[root@master-09:31:22 38~]#fdisk -l