cd /sys/class/scsi_host/

[root@centos4 scsi_host]# ls

host0  host1  host2

有几个host就刷几次

[root@centos4 scsi_host]# echo "- - -" > /sys/class/scsi_host/host0/scan

[root@centos4 scsi_host]# echo "- - -" > /sys/class/scsi_host/host1/scan

[root@centos4 scsi_host]# echo "- - -" > /sys/class/scsi_host/host2/scan