Technical data

8 Storage Information
This chapter contains information about storage devices used as backing stores for guest virtual
devices.
8.1 Changes and Issues in This Release
The following sections provide storage issues in the V4.3 release.
8.1.1 Changes to the Default EFI AVIO Storage Driver Enumeration Policy
Prior to HP Integrity Virtual Machines V4.3, the default policy of the EFI AVIO storage driver was
to enumerate and configure all AVIO storage devices defined in a guest's configuration. This would
make all AVIO storage devices visible to EFI. With V4.3 (and later), the default enumeration policy
is to enumerate and configure only those AVIO storage devices that are present as EFI boot options.
The change to the enumeration policy has been made to reduce the time to boot to EFI in the cases
of guest configurations with large amounts of AVIO storage devices configured. This policy change
affects only the devices enumerated or configured at the EFI level, not at the guest operating system
level.
As a result of the default enumeration policy change, some attempted operations within EFI (such
as boot management, or new guest installations) may fail because of non-present AVIO storage
devices. To make the AVIO storage devices visible to EFI, the enumeration policy can be changed
to enumerate or configure all AVIO storage devices. For information about how to change the
enumeration policy, see the HP Integrity Virtual Machines 4.3: Installation, Configuration, and
Administration Guide.
Changing the policy to enumerate all AVIO storage devices might result in longer guest boot times
(to the EFI level), depending on the guest's configuration.
8.1.2 VM Guest Running on an NFS Backing Store
The information in the HP Integrity Virtual Machines 4.3: Installation, Configuration, Administration
is incomplete. This section provides the necessary information needed to create a VM guest on an
NFS backing store. The following is an example of bringing up a VM guest running on an NFS
backing store:
1. Create an LVM volume group, /dev/vg-nfs on a 36 GB disk.
2. Create a single logical volume on that volume group using the entire space,
/dev/vg-nfs/lvol1.
3. Assuming this volume group and logical volume were created on the 11i v3 NFS server, create
a VxFS file system on a logical volume and export that to the NFS clients.
4. Create virtual machine with the NFS-mounted file-based backing store created using the
hpvmdevmgmt command, so the resulting guest looks like the following:
[Storage Interface Details]
Guest Physical
Device Adaptor Bus Dev Ftn Tgt Lun Storage Device
======= ========== === === === === === ========= =========================
disk avio_stor 0 0 0 0 0 file /vm-guest1/bootfile
At this point, you can boot the guest and install the HP-UX 11i v3 operating system on the guest
as you would do on any other VM guest.
8.1.3 Storage Interface Support for OpenVMS Guests
The OpenVMS guest supports the AVIO interface, however, Integrity VM commands allow you to
configure both AVIO and VIO devices to a guest. These VIO devices might not give any apparent
8.1 Changes and Issues in This Release 31