Passthrough Physical Disk to Virtual Machine (VM): Difference between revisions

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* before adding physical disk to host make note of vendor,serial  so that you'll know which disk to share in /dev/disk/by-id/  
* before adding physical disk to host make note of vendor,serial  so that you'll know which disk to share in /dev/disk/by-id/  


* lshw on pve host after adding,  
* lshw on pve host after adding.  note use ''apt-get install lshw'' if lshw is not already installed.  
<pre>
<pre>
lshw -class disk -class storage
...
           *-disk
           *-disk
                 description: ATA Disk
                 description: ATA Disk
Line 16: Line 18:
                 size: 2794GiB (3TB)
                 size: 2794GiB (3TB)
                 configuration: ansiversion=5 sectorsize=4096
                 configuration: ansiversion=5 sectorsize=4096
...
</pre>
</pre>


Revision as of 16:46, 21 January 2014

  • before adding physical disk to host make note of vendor,serial so that you'll know which disk to share in /dev/disk/by-id/
  • lshw on pve host after adding. note use apt-get install lshw if lshw is not already installed.
lshw -class disk -class storage

...
           *-disk
                description: ATA Disk
                product: ST3000DM001-1CH1
                vendor: Seagate
                physical id: 0.0.0
                bus info: scsi@3:0.0.0
                logical name: /dev/sda
                version: CC27
                serial: Z1F41BLC
                size: 2794GiB (3TB)
                configuration: ansiversion=5 sectorsize=4096
...
  • device names like /dev/sdc should never be used as those can change. instead use /dev/disk/by-id . check by listing all of that directory then look for the disk added by matching serial number from lshw and the physical disk :
ls -l /dev/disk/by-id/ata-ST3000DM001-1CH166_Z1F41BLC
lrwxrwxrwx 1 root root 9 Jan 21 10:10 /dev/disk/by-id/ata-ST3000DM001-1CH166_Z1F41BLC -> ../../sda


  • add to kvm :
qm set  592  -virtio2 /dev/disk/by-id/ata-ST3000DM001-1CH166_Z1F41BLC

update VM 592: -virtio2 /dev/disk/by-id/ata-ST3000DM001-1CH166_Z1F41BLC
  • check
grep Z1F41BLC /etc/pve/qemu-server/592.conf

virtio2: /dev/disk/by-id/ata-ST3000DM001-1CH166_Z1F41BLC,size=2930266584K
  • stop and restart ... then configure disk from within the kvm.
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