virt-manager如何添加ssd设备和nvme设备
ssd设备
最近在virt-manager添加虚拟磁盘时发现，无论如何都会被识别成hdd，在查找一番后发现了 how-to-add-virtual-storage-as-ssd-in-kvm 很遗憾这种方法无法使用会报错找不到设备 最后我在官方文档看到了
The optional attribute rotation_rate sets the rotation rate of the storage for disks on a SCSI, IDE, or SATA bus. Values in the range 1025 to 65534 are used to indicate rotational media speed in revolutions per minute. A value of one is used to indicate solid state, or otherwise non-rotational, storage. These values are not required to match the values of the underlying host storage. Since 0.0.3; bus attribute since 0.4.3; tray attribute since 0.9.11; "usb" attribute value since after 0.4.4; "sata" attribute value since 0.9.7; "removable" attribute value since 1.1.3; "rotation_rate" attribute value since 7.3.0
机翻过来
可选属性rotation_rate设置SCSI、IDE 或SATA 总线上磁盘的存储旋转速率。1025 到 65534 范围内的值用于指示旋转介质速度（以每分钟转数为单位）。值一用于指示固态或非旋转存储。这些值不需要与底层主机存储的值匹配。 从 0.0.3 开始；从 0.4.3 开始“bus”属性；从 0.9.11 开始"tray" 属性；0.4.4 之后的“usb”属性值 ；自 0.9.7 起“sata”属性值；自 1.1.3 起， “removable”属性值；自 7.3.0 起的“rotation_rate”属性值
并且找到了这个例子
<disk type='block' device='lun'>
<driver name='qemu' type='raw'/>
<source dev='/dev/sda'>
<slices>
<slice type='storage' offset='12345' size='123'/>
</slices>
<reservations managed='no'>
<source type='unix' path='/path/to/qemu-pr-helper' mode='client'/>
</reservations>
</source>
<target dev='sda' bus='scsi' rotation_rate='1'/>
<address type='drive' controller='0' bus='0' target='3' unit='0'/>
</disk>在virt-manager->编辑->首选项->常规->启用xml编辑 再在target属性添加rotation_rate='1'就行了
nvme设备
在头部修改
<domain type='kvm'>
为
<domain xmlns:qemu="http://libvirt.org/schemas/domain/qemu/1.0" type="kvm">在最后添加
......
</devices>
<qemu:commandline>
<qemu:arg value="-drive"/>
<qemu:arg value="file=/mnt/windows/tmp/archlinux.qcow2,format=raw,if=none,id=nvm"/>
<qemu:arg value="-device"/>
<qemu:arg value="nvme,drive=nvm,serial=nvm"/>
<qemu:arg value="-drive"/>
<qemu:arg value="file=/var/lib/libvirt/images/archlinux-3.qcow2,format=raw,if=none,id=nvm-1"/>
<qemu:arg value="-device"/>
<qemu:arg value="nvme,drive=nvm-1,serial=nvm-1,bus=pcie.0,addr=0x11"/>
</qemu:commandline>
</domain>如果虚拟pcie插槽地址重复可以修改addr值