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VM Manager screens might incorrectly identify or omit USB backing devices
Applies to usage with: Both Insight Dynamics and HP SMH Standalone
Integrity VM 4.x allows a USB DVD or CD drive to be used as the backing devices for a virtual
DVD or CD in a virtual machine. However, in the HP-UX 11i v3 September 2008 Operating
Environment Update Release (OEUR) and earlier, the drivers for the USB devices are not
completely integrated into the HP-UX 11i v3 agile mass storage stack. They have neither a
persistent device special file nor a LUN hardware path. In addition, they have an ioscan
description that might not correctly indicate the type of device. For example, ioscan might
report "USB SCSI Stack Adaptor" as the description of a USB DVD drive. If a USB device is used
as the backing device for a virtual DVD, it appears on the VM Host Storage or VM Properties
Storage tab with the same description given it by ioscan. Although that description might not
indicate that the device is a DVD drive, the device is tagged with a DVD icon to indicate that it
is a CD or DVD drive.
Additionally, because the device has no agile address, in the Add Storage Device dialog used
with the Modify→Add Storage Device menu item and in the Create Virtual Machine wizard,
a USB DVD or CD drive is displayed in the list of potential backing devices only when the "legacy
addressing" radio button is selected. It does not appear when the "agile addressing" radio button
is selected (the default value on first entry to the dialog).
Workaround
You can remove this limitation by installing new USB drivers and additional
patches available at the following IT Resource Center (ITRC) website:
http://itrc.hp.com/
For HP-UX 11i v3, install patch PHKL_37815 and its co-requisite patches on HP-UX 11i v3 OEUR
0809. For HP-UX 11i v2, install patch PHKL_37814 and its co-requisite patches. These patches
collectively integrate USB into the mass storage stack for HP-UX 11i v3 and v2 respectively, and
they add additional functionality such as support for USB 2.0.
The USB change is automatically included in all HP-UX 11i v3 OEUR releases after 0809.
For information about updating to the new USB driver on HP-UX 11i v3, see the Update to USB
Driver Support on HP-UX 11i v3 manual.
For more information about HP-UX 11i v2 patches, see the Update to USB Driver Support on
HP-UX 11i v2 manual.
Storage tabs might display duplicate lines between agile and legacy physical storage
device representations
Applies to usage with: Both Insight Dynamics and HP SMH Standalone
For a VM Host with Integrity VM Version 4.0, if the VM Manager VM Host Storage or VM
Properties Storage tab has the Show physical host bus adapters checkbox selected, the
right-hand side of the display includes lines associating two boxes representing the same physical
storage device, one with the agile persistent device special file (DSF), such as /dev/rdisk/disk4,
and the other with the legacy DSF, such as /dev/rdsk/c2t0d0.
If a virtual machine contains a virtual storage device that uses the persistent DSF, while another
virtual machine on the same VM Host uses the legacy DSF for a virtual storage device using the
same physical backing store, either virtual storage device might be displayed in the VM Host
Storage or VM Properties Storage tab with duplicate lines between the two box representations
of the physical storage device.
Workaround
When configuring virtual storage devices, consistently use either the persistent
DSF or the legacy DSF for any physical device in all its uses as a backing device. HP recommends
using the persistent DSF. Its path independence automatically expedites load balancing and
failover.
8
VM Manager limitations and known issues
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