| 话不多说，直接开始 $ cat /proc/scsi/scsi Attached devices:Host: scsi1 Channel: 00 Id: 00 Lun: 00 Vendor: NECVMWar Model: VMware IDE CDR10 Rev: 1.00 Type: CD-ROM ANSI SCSI revision: 05Host: scsi2 Channel: 00 Id: 00 Lun: 00 Vendor: VMware Model: Virtual disk Rev: 1.0 Type: Direct-Access ANSI SCSI revision: 02Host: scsi2 Channel: 00 Id: 01 Lun: 00 Vendor: VMware Model: Virtual disk Rev: 1.0 Type: Direct-Access ANSI SCSI revision: 02$ echo "scsi add-single-device 2 0 2 0" > /proc/scsi/scsi$ cat /proc/scsi/scsi Attached devices:Host: scsi1 Channel: 00 Id: 00 Lun: 00 Vendor: NECVMWar Model: VMware IDE CDR10 Rev: 1.00 Type: CD-ROM ANSI SCSI revision: 05Host: scsi2 Channel: 00 Id: 00 Lun: 00 Vendor: VMware Model: Virtual disk Rev: 1.0 Type: Direct-Access ANSI SCSI revision: 02Host: scsi2 Channel: 00 Id: 01 Lun: 00 Vendor: VMware Model: Virtual disk Rev: 1.0 Type: Direct-Access ANSI SCSI revision: 02Host: scsi2 Channel: 00 Id: 02 Lun: 00 Vendor: VMware Model: Virtual disk Rev: 1.0 Type: Direct-Access ANSI SCSI revision: 02 通过命令可以看到扫描到了新的磁盘，实现了不重启添加硬盘 
$ echo "scsi add-single-device 2 0 2 0" > /proc/scsi/scsi参数值 w、x、y 、 z，解释如下：w（Host）是主机适配器标识，第一个适配器为零（0）x （Channel）是主机适配器上的 SCSI 通道，第一个通道为零（0）y （ID）是设备的 SCSI 标识z （Lun）是 LUN 号，第一个 LUN 为零（0） 1. 添加了磁盘后查看，没有刷新出来Disk /dev/sda: 17.2 GB, 17179869184 bytes255 heads, 63 sectors/track, 2088 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk 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root@node /]# 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 最后 fdisk -l 可以看到添加后的磁盘了
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