ESX中的Linux热添加磁盘
给VM新加了一个磁盘，不想重启VM又想认出这个磁盘怎么办呢？可以用这个命令：
echo "scsi add-single-device A B C D" >/proc/scsi/scsi
参数 A、B、C、D 的内容是：
A : SCSI HBA ID
B : SCSI Channel
C : SCSI ID
D : LUN ID
就下图的设置命令可以写成这样：
echo "scsi add-single-device 1 0 1 0" >/proc/scsi/scsi
效果如下：
# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 00 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
#
#
# echo "scsi add-single-device 1 0 1 0" >/proc/scsi/scsi
# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 00 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 01 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
相反可以使用这个命令移除磁盘：
echo "scsi remove-single-device A B C D" > /proc/scsi/scsi
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