参考 https://linux.cn/article-9231-1.html

1. 添加了磁盘后查看，没有刷新出来

[root@node /]# fdisk -l

Disk /dev/sda: 17.2 GB, 17179869184 bytes

255 heads, 63 sectors/track, 2088 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x000aa84a

   Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *           1        2089    16775168   83  Linux

/dev/sda2            2089        2089        1024   82  Linux swap / Solaris

2. 查看主机总线号

 /]# ls /sys/class/scsi_host/

host0  host1  host2

3.重新扫描SCSI总线来添加设备

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

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

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

4.fdisk -l 可以看到添加后的磁盘了