[SOLVED] block device/hard disk passthrough, use virtio or scsi?

[rampage]

Hi,

While passthrough the hard drive to the kvm guest, am I supposed to use virtio or scsi mode for best IO performance?
The device is identified as scsi0 and scsi1 , so what I used is

qm set 103 -scsi0 /dev/disk/by-id/ata-ST3000DM001-XXXXXXX
qm set 103 -scsi1 /dev/disk/by-id/ata-ST3000DM001-YYYYYYY

Cheers,

 

[dietmar]

SCSI is good, as long as you the 'virtio-scsi-pci' controller. You can enable that with:

# qm set 103 -scsihw virtio-scsi-pci

 

[rampage]

SCSI is good, as long as you the 'virtio-scsi-pci' controller. You can enable that with:

# qm set 103 -scsihw virtio-scsi-pci

thanks for the qucik reply.
I checked the qemu configration file and saw
virtio-scsi-pci is the default implementation of scsihw now.

 

[dietmar]

virtio-scsi-pci is the default implementation of scsihw now.

yes (if you create the VM using the GUI)

 

[mir]

SCSI is good, as long as you the 'virtio-scsi-pci' controller. You can enable that with:

# qm set 103 -scsihw virtio-scsi-pci

or virtio-scsi-single?