Comment 4 for bug 1155512

For Issue 1: I launch a VM, and attached a volume created from an image at /dev/vdb. Then I run sudo fdisk -l and here is the result.

======================================Result====================================================
ubuntu@vm:/tmp/stage$ sudo fdisk -l

Disk /dev/vda: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 cylinders, total 4194304 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

   Device Boot Start End Blocks Id System
/dev/vda1 * 16065 4192964 2088450 83 Linux

Disk /dev/vdb: 1073 MB, 1073741824 bytes
16 heads, 63 sectors/track, 2080 cylinders, total 2097152 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/vdb doesn't contain a valid partition table

It seems the volume has no valid partition table and it won't be able to boot. I check the method to copy image to a volume. IMO, image_utils.fetch_to_raw for ISCSIDriver does not really create a bootable volume.