增加磁盘不重启虚拟机识别磁盘

[root@localhost opt]# ls /sys/class/scsi_host/ 

host0 host1 host2
[root@localhost opt]#
[root@localhost opt]#
[root@localhost opt]# echo "- - -" > /sys/class/scsi_host/host0/scan
[root@localhost opt]# echo "- - -" > /sys/class/scsi_host/host1/scan
[root@localhost opt]# echo "- - -" > /sys/class/scsi_host/host2/scan
[root@localhost opt]#
[root@localhost opt]#
[root@localhost opt]# ls /sys/class/scsi_device/
0:0:0:0 1:0:0:0 2:0:0:0 2:0:1:0 2:0:2:0
[root@localhost opt]#
[root@localhost opt]#
[root@localhost opt]# echo 1 > /sys/class/scsi_device/0:0:0:0/device/rescan
[root@localhost opt]# echo 1 > /sys/class/scsi_device/1:0:0:0/device/rescan
[root@localhost opt]# echo 1 > /sys/class/scsi_device/2:0:0:0/device/rescan
[root@localhost opt]# echo 1 > /sys/class/scsi_device/2:0:1:0/device/rescan
[root@localhost opt]# echo 1 > /sys/class/scsi_device/2:0:2:0/device/rescan