HP Integrity Virtual Machines Installation, Configuration, and Administration

• storage is one of the following: disk, lv, file, null, or attach
The selection of storage type defines what VM Host system files apply. For example, lv
implies the use of logical volume character device files.
For virtual devices, the selection of VM Host storage determines what type of virtual media
the virtual device will use. For example, the selection of lv for a virtual disk, makes it a
Virtual LvDisk to the VM.
A VM Host storage entity can only be used for one VM device type at a time. For example,
a VM Host CD/DVD drive cannot be used for a Virtual DVD and an attached burner at the
same time.
• location is a VM Host system file
The file permissions on the VM Host system file are not honored by Integrity VM. VM device
types that support write operations can still do so using a VM Host system file marked read
only.
There may be more than one VM Host system file that points to the same VM Host storage
entity. For example, if there are multiple paths to storage present on the VM Host, there can
be more than one disk system file that points to the same disk. Different VM Host system
files change how I/O is routed to the VM storage resource, but the system files point to the
same storage entity. Therefore, different system files cannot constitute different VM storage
resources. A given VM storage resource can only be specified once to a given virtual machine.
Therefore, only one VM Host system file per VM Host storage entity can be provided to a
virtual machine (see Section 7.2.1.4: “VM Storage Management” (page 78)).
Not all virtual device types support all VM Host storage types (see Section 7.1.3: “Integrity VM
Storage Implementations” (page 73)). Complete VM storage resource statements are discussed
in the next section.
7.2.2.3 VM Storage Resource Statements
This subsection provides information on formulating complete valid resource statements for
Integrity VM storage devices.
To specify an Integrity VM storage device for a virtual machine, use a complete valid resource
statement with the hpvmcreate or hpvmmodify command. The resource statement is a
combination of the VM guest resource specification (described in“VM Guest Storage Specification”
(page 81)) and the VM Host Storage Specification (described in “VM Host Storage Specification”
(page 81)). This section provides examples of complete resource statements for each of the
following types of virtual storage devices:
• Section 7.2.2.3.1: “Virtual Disks” (page 83)
• Section 7.2.2.3.2: “Virtual LvDisks” (page 84)
• Section 7.2.2.3.3: “Virtual FileDisks” (page 86)
• Section 7.2.2.3.4: “Virtual DVDs” (page 86)
• Section 7.2.2.3.5: “Virtual FileDVDs” (page 87)
• Section 7.2.2.3.6: “Virtual NullDVDs” (page 88)
• Section 7.2.2.3.7: “Attachable Devices” (page 89)
A virtual machine can have up to 30 devices total (number of virtual and attached devices).
The maximum size of a virtual storage resource is 2 TB. The minimum size of a virtual storage
resource is 512 bytes for virtual disk and 2048 bytes for a virtual DVD.
Do not specify the same storage resource, virtual or attached, for the same virtual machine more
than once (see Section 7.2.1.4: “VM Storage Management” (page 78)). Unless otherwise noted,
storage resources, virtual or attached, cannot be simultaneously shared by virtual machines.
All multipath products for storage resources must run on the VM Host; multipath solutions are
not supported in a virtual machine. All multipath solutions used on the VM Host must be in
82 Creating Virtual Storage Devices