Comment 17 for bug 929545

Hi,

The intention here is to boot every disk volume using the virtual Hyper-V SCSI adapter? That would be different than the procedure for setting up VM guest disks (on Windows systems only?) as described in Microsoft's Hyper-V docs, but maybe that is the goal.

from http://technet.microsoft.com/en-us/library/dd183729%28WS.10%29.aspx

>You can select either integrated device electronics (IDE) or SCSI devices on virtual machines:
> IDE devices. Hyper-V uses emulated devices with IDE controllers. You can have up to two IDE controllers with two disks on each controller. The startup disk (sometimes referred to as the boot disk) must be attached to one of the IDE devices. The startup disk can be either a virtual hard disk or a physical disk. Although a virtual machine must use an IDE device as the startup disk to start the guest operating system, you have many options to choose from when selecting the physical device that will provide the storage for the IDE device. For example, you can use any of the types of physical storage identified in the introduction section.
> SCSI devices. Each virtual machine supports up to 256 SCSI disks (four SCSI controllers with each controller supporting up to 64 disks). SCSI controllers use a type of device developed specifically for use with virtual machines and use the virtual machine bus to communicate. The virtual machine bus must be available when the guest operating system is started. Therefore, virtual hard disks attached to SCSI controllers cannot be used as startup disks.
...
>Note
>Although the I/O performance of physical SCSI and IDE devices can differ significantly, this is not true for the virtualized SCSI and IDE devices in Hyper-V. Hyper-V. IDE and SCSI devices both offer equally fast I/O performance when integration services are installed in the guest operating system.

I can try this early 12.04 code out too on a Hyper-V host. I am using Ubuntu 10.04 as a guest OS quite a bit on Hyper-V hosts.

Regards,
Tim Miller Dyck