HP Integrity Virtual Machines Release Notes Version A.03.50

disk 25 0/0/6/0.4.0 sdisk CLAIMED DEVICE HP Virtual Disk
/dev/dsk/c4t4d0 /dev/rdsk/c4t4d0
Workaround: Use the System Management Homepage (SMH) to configure the devices.
8.4 AVIO Current Limitations
The following sections describe the current limitations using AVIO.
8.4.1 Modifying the Storage Adapter from scsi to avio_stor
If you attempt to modify a storage adapter from scsi to avio_stor on a port for a running
guest, the hpvmmodify command allows the change, but the change lasts only until the next
guest startup. In addition, the hpvmnet command displays incorrect port information for the
currently running guest until the guest is stopped and restarted.
8.4.2 Virtual Device Types and Backing Store Support
The current release of the AVIO storage driver does not have support for all of the physical
backing stores or virtual device types supported by the virtual SCSI adapter.
The following physical backing stores are not supported by the AVIO driver:
• Attach
• Disk Partitions
AVIO storage supports lv backing store devices (Virtual LvDisk) on HostAVIOStor B.11.23.0712.01
and later. VxVM logical volumes are not supported.
The following virtual device types are not supported by the AVIO driver:
• Tape
• Changer
• Burner
NOTE: The hpvmstatus -V command does not display ioscan format for AVIO devices.
A virtual machine can have up to 30 VIO devices or up to 128 AVIO devices total (the number
of virtual and attached devices).
8.4.3 GuestAVIO Bundle not Installed but AVIO Storage Device is Configured
If the GuestAVIO bundle is not installed on the guest but you've configured an AVIO storage
device, the AVIO Stor HBAs will not be claimed in the guest and the LUNs configured under
the AVIO Stor HBAs will not be accessible. If the LUN is a boot disk, boot will fail with a panic
indicating missing drivers.
8.4.4 Access of Disk Configured Under an AVIO Storage Adapter Might Take Longer
than Expected
Access of a disk configured under an AVIO storage adapter might take up to 30 seconds on an
HP-UX guest if there are errors on the backing store in the host. For example, when the backing
store device is removed or not responding, an open of the disk device, configured under an AVIO
storage adapter, from the Integrity VM guest might take up to 30 seconds. An application that
tries to open an AVIO disk device might see a delay because of this. For example, the diskinfo
command might fail after 30 seconds:
# time diskinfo /dev/rsdk/c1t14d0:
diskinfo: can't open /dev/rdsk/c1tl4d0: No such device or address
real 0m30.26s
user 0m0.00s
sys 0m0.01s
62 Storage Information