kvm 挂载裸设备
一、依赖于lvm创建1
lvcreate -L 1.6T -n kvmdata /dev/VolGroup00
二、修改domain xml
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virsh edit domainname
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none'/>
<source dev='/dev/VolGroup00/kvmdata'/>
<target dev='vdb' bus='virtio'/>
</disk>
哦了，重启domain name就可以了
三、 live add disk, 在线添加，重启失效
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virsh attach-disk DomainName /dev/sr0 vdc --config --type cdrom --mode readonly
官方文档
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/sect-Virtualization-Adding_storage_devices_to_guests-Adding_hard_drives_and_other_block_devices_to_a_guest.html
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