Patrik Dufresne KVM testing on Debian 8.7 via the Phoronix Test Suite. test-io-virtio-zvol: Processor: Common KVM @ 2.40GHz (2 Cores), Motherboard: QEMU Standard PC (i440FX + PIIX 1996), Chipset: Intel 440FX- 82441FX PMC, Memory: 494MB, Disk: 8GB, Graphics: Cirrus Logic GD 5446, Network: Red Hat Virtio device OS: Debian 8.7, Kernel: 3.16.0-4-amd64 (x86_64), Compiler: GCC 4.9.2, File-System: ext4, System Layer: KVM IOzone 3.405 Record Size: 4Kb - File Size: 4GB - Disk Test: Read Performance MB/s > Higher Is Better test-io-virtio-zvol . 399.92 |================================================= IOzone 3.405 Record Size: 4Kb - File Size: 4GB - Disk Test: Write Performance MB/s > Higher Is Better test-io-virtio-zvol . 255.63 |=================================================