HP Integrity Virtual Machines Installation, Configuration, and Administration Version A.03.50

• pcislot is an integer from 0-7.
A PCI function number is not specified. It is implicitly zero because the virtual MPT storage
adapter supports only a single channel.
• scsitgt is an integer from 0-14 (15 is reserved for the virtual SCSI adapter).
Unlike real parallel SCSI bus, there is no arbitration on virtual SCSI buses. The SCSI target
IDs for the virtual devices must be unique.The virtual SCSI MPT adapter takes target ID 15
for itself, leaving 0-14 for SCSI targets.
All SCSI targets connected to a VM are single LUN devices. That is, virtual disks and DVDs
are emulated as single LUNs and all attached devices are specified by per LUN VM Host
system files. The physical LUN number of an attached device has no impact. All virtual and
attached SCSI LUN numbers are implicitly zero and therefore not specified.
All supported storage device types can share the same virtual SCSI MPT adapter. Up to 15
storage devices can be added to the same SCSI MPT adapter by specifying the same PCI bus
and slot numbers.
A virtual SCSI MPT adapter can only be added to a virtual machine if it has a device connected
to it.
Not all device types are virtualized. Disk and DVD devices are virtual device types, whose virtual
media comes from the VM Host. Tapes, changers, and burners are physical VM Host devices.
For these attached devices, the physical SCSI IDs do not determine their place on the virtual bus.
7.2.2.2 VM Host Storage Specification
Each VM storage device is backed by some VM Host storage entity. A VM Host entity is defined
on the VM Host with a system file, which is used by Integrity VM and the VM Host operating
system in processing I/O to and from that storage entity.
A VM Host administrator specifies these storage entities using the following specification:
storage:location
Where:
• 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 (page 88)).
92 Creating Virtual Storage Devices