HP Integrity Virtual Machines 4.2: Installation, Configuration, and Administration

Table 7-2 Patch Dependencies for AVIO Attached Devices
NotesGuestVM HostHP-UX VersionPatch Number
Hard
1
dependency
for guest, and soft
2
dependency for VM
Host.
YesYes11i v3PHKL_38604
Soft dependency on
VM Host.
NoYes11i v3PHKL_38605
Recommended patch.YesYes11i v3PHKL_38750
1
Enforced during swinstall.
2
Required only if attached devices are configured. No enforcement using swinstall.
7.1.3.9 Error Messages
This section lists possible VM Host and guest error messages and their description.
• VM Host error messages
— Access error on a shared attached device
The VM Host's attempt on a shared tape is denied when it is in use by any guests.
Applications receive a busy error in such cases. For example. here is the behavior of
diskinfo on a tape which is being used by a guest:
# diskinfo /dev/rtape/tape1_BEST
diskinfo: can't open /dev/rtape/tape1_BEST: Device busy
• Guest error messages
— 11i v3 guest — access error on a shared attached device
A guest access attempt on a shared tape is denied when it is in use by the VM Host or
other guests. Applications receive a busy error in such cases. For example, here is the
behavior on diskinfo on a tape that is being used by another guest.
# diskinfo /dev/rtape/tape1_BEST
diskinfo: can't open /dev/rtape/tape1_BEST: Device busy
— 11i v2 guest — access error on a shared attached device
A guest access attempt on a shared tape is denied when it is in use by the VM Host or
other guests. Applications receive a no-device error in such cases. For example, here is
the behavior on diskinfo on a tape that is being used by another guest.
# diskinfo /dev/rmt/c7t0d0BEST
diskinfo: can't open /dev/rmt/c7t0d0BEST: No such device or address
7.1.4 Integrity VM Storage Implementations
This section describes the implementations of the Integrity VM storage architectures.
7.1.4.1 Integrity VM Storage Adapters
Integrity VM provides two types of virtual PCI storage adapters to process virtual storage I/O
requests:
• Virtual parallel SCSI MPT adapter
• Accelerated Virtual I/O (AVIO) adapter
All supported guest operating systems contain native MPT SCSI adapter drivers that communicate
with this PCI register emulation. All virtual and attachable devices can be used with this single
virtual storage adapter.
The AVIO storage adapter is a high performance adapter and needs guest OS drivers. AVIO
supports up to 128 storage devices per guest and also leverages the VM Host 11i v3 storage stack
features to provide better storage manageability in the guest. VxVM is also supported as an
7.1 Introduction to Integrity VM Storage 101