hdparmlarge AMD Opteron 4171 HE testing with a Microsoft Virtual Machine v7.0 and Microsoft Hyper-V virtual VGA on Ubuntu 12.04 via the Phoronix Test Suite. hdparmlargecfg: Processor: AMD Opteron 4171 HE @ 2.09GHz (1 Core), Motherboard: Microsoft Virtual Machine v7.0, Chipset: Intel 440BX/ZX/DX, Memory: 512 MB + 1280 MB, Disk: 32GB Virtual Disk + 75GB Virtual Disk, Graphics: Microsoft Hyper-V virtual VGA OS: Ubuntu 12.04, Kernel: 3.2.0-35-virtual (x86_64), Display Driver: microsoft, Compiler: GCC 4.6, File-System: ext4 hdparm Timed Disk Reads Disk To Read: /dev/sda MB/s > Higher Is Better hdparmlargecfg . 73.97 |======================================================= hdparm Timed Disk Reads Disk To Read: /dev/sda1 MB/s > Higher Is Better hdparmlargecfg . 166.53 |====================================================== hdparm Timed Disk Reads Disk To Read: /dev/sdb MB/s > Higher Is Better hdparmlargecfg . 466.66 |====================================================== hdparm Timed Disk Reads Disk To Read: /dev/sdb1 MB/s > Higher Is Better hdparmlargecfg . 458.19 |======================================================