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6.10 Virtual Disks
Virtual disks can be based on the following types of physical devices and files. Each
type includes an example statement.
• A physical disk device, such as a DVD, that is accessible as a device to the host.
phy:/dev/cdrom
• A file that contains a disk image accessible from the file system of the host. Disk
images can be encoded as raw, QEMU, or VMware.
file:/mnt/disks/sles10sp1.iso
tap:aio:/mnt/disks/sles10sp1.iso specifies a raw disk that might be
taken from a different virtualization platform.
tap:qcow:/mnt/disks/sles10sp1.iso.qcow
tap:vmdk:/mnt/disks/sles10sp1.iso.vmdk
• A remote storage device specified using the Internet SCSI (iSCSI) protocol.
iscsi:iqn.2001-04.com.acme@0ac47ee2-216e-452a-a341-a12624cd0225
• A remote storage device specified using a Fibre Channel (NPIV) protocol.
npiv:210400e08b80c40f
6.11 Migrating Virtual Machines
A running virtual machine can be migrated from its source virtual machine host to an-
other virtual machine host. This functionality is referred to as live migration. For live
migration to work, the virtual machine being migrated must have access to its storage
in exactly the same location on both, source and destination host platforms.
Live migration only works when every entity involved is the same architecture. For
example, a 64-bit paravirtualized guest running on a 64-bit hypervisor can be migrated
Virtualization: Configuration Options and Settings
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