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: 05
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: 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: 05
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi2 Channel: 00 Id: 01 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: 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
[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
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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