HP Integrity Virtual Machines 4.3: Installation, Configuration, Administration

adapter, simply called scsi, is an emulated single-ported parallel SCSI MPT storage adapter
that can be used to connect 15 SCSI target devices to a guest. An AVIO storage adapter is also
supported. The AVIO storage adapter supports up to 128 devices per adapter (and host) and
provides higher performance and guest storage manageability.
A VM Host administrator specifies this SCSI MPT adapter using the following:
device:scsi:pcibus,pcislot,scsitgt
where:
device is one of the following: disk, dvd, tape, changer, or burner
pcibus is an integer from 0-6.
The virtual AVIO and MPT adapters are supported only on PCI buses 0-7.
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 for virtual SCSI (15 is reserved for the virtual SCSI adapter)
and 0–127 for AVIO. All supported storage device types can share the same virtual SCSI
MPT or AVIO adapter by specifying the same PCI bus and slot numbers. A virtual SCSI
MPT or AVIO adapter can be added only to a virtual machine if it has a device connected
to it.
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 be added only 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.
6.2.2.2 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 uses. For example, the selection of lv for a virtual disk, makes it a Virtual
LvDisk to the VM. It does not support the attach storage type.
102 Creating Virtual Storage Devices