Using AVIO with Integrity VM

AVIO is supported by multiple guest operating systems and is optional based on a properly configured VM Host and changes to the guest operating systems. For AVIO support details, see the HP Integrity Virtual Machines Version 4.1 Release Notes and the AVIO product documentation. You must install and configure kernel drivers on both the VM Host and the guest systems. The guest configuration file and the hpvmstatus command display the avio_lan and avio_stor designators.

	NOTE: HP strongly recommends that you use the same AVIO components from the same release on both the VM Host and guests, for example, both from the OE or both from the same Web Release (for example, WEB0803).

The following example shows the hpvmstatus command output of AVIO adapters for guest avioclone:

[Storage Interface Details]
Guest Device type                            :disk
Guest Adaptor type                           :avio_stor
Bus                                          :0
Device                                       :0
Function                                     :0
Target                                       :3
Lun                                          :0
Physical Storage type                        :disk
Physical device                              :/dev/rdisk/disk2

[Network Interface Details]
Physical Storage type                        :vswitch
Guest Adaptor type                           :avio_lan
Backing                                      :swlan1
Vswitch Port                                 :5
Bus                                          :0
Device                                       :1
Function                                     :0
Mac Address                                  :2a-2e-5a-05-0a-ba

Physical Storage type                        :vswitch
Guest Adaptor type                           :avio_lan
Backing                                      :swlan2
Vswitch port                                 :9
Bus                                          :0
Device                                       :2
Function                                     :0
Mac Address                                  :2a-2e-5a-05-0a-bc 

	NOTE: The CLI accepts either avio_lan or aviolan and either avio_stor or aviostor. For example, the following hpvmcreate commands add both an AVIO network and an AVIO disk to the guest aviotest: # hpvmcreate -P aviotest -O hpux -a network:aviolan::vswitch:swlan1 \ -a hba:aviostor::disk/dev/rdisk/disk1 # hpvmcreate -P aviotest -O hpux -a network:avio_lan::vswitch:swlan1 \ -a hba:avio_stor::disk/dev/rdisk/disk1

The AVIO network host driver allows simultaneous access to a vswitch from guests configured with or without AVIO guest drivers for their virtual network interface cards (vNICs). Existing guests continue to operate correctly and their configurations remain unchanged. Guests configured to use a common vswitch are allowed to share VLANs that are in use by guests with or without AVIO configured. Ports remain distinct for each running guest whether or not AVIO is in use. AVIO networks must use a Supported Host Physical Point Attachment (PPA) network device. For a list of supported AVIO PPAs, see the HP Integrity Virtual Machines Version 4.1 Release Notes. A nonphysical vswitch, such as localnet, is not supported in this release.

AVIO increases the maximum number of devices that can be supported in a guest to 128. In this release, AVIO supports the disk and DVD device types, while burner, tape, and changer device types are not supported. The dynamic addition and deletion of AVIO devices is supported. The following backing-store options are supported:

All other backing store options, such as null for non-DVD devices and attached, are not supported.

	NOTE: In general, AVIO devices (that is, avio_lan, aviolan, avio_stor, or aviostor) are configured and managed the same as VIO devices (that is lan and scsi). However, some additional Integrity VM command options and limitations on backing devices are noted throughout this document.

With HP-UX 11i v3, the AVIO storage guest driver can receive events asynchronously from the VM Host for avio_stor devices whenever the underlying storage, such as lun or target, changes state, for example, when a new lun or target is added or deleted or when the size of a lun changes. The asynchronous event generation occurs in addition to any notifications issued using the SCSI programming model, such as CHECK CONDITION on a subsequent I/O.

When the AVIO storage driver on the guest detects the events, it takes the appropriate actions, such as discovering the new targets. For example, if new targets are added using the hpvmmodify -a command, then the guest driver automatically detects the new device without the manual scan. The guest automatically detects any modification of the underlying backing storage.