HP-UX vPars and Integrity VM V6.1.5 Administrator Guide (5900-2295, April 2013)

CD/DVD using the appropriate IN and EJ commands. When the media is loaded, proceed with
the installation.
NOTE: The hpvmmodify command might fail to change a Virtual FileDVD if the device has
already been modified by the virtual console. The hpvmstatus command displays the current
status of the Virtual FileDVD, which might not be in its original resource state. To see the original
resource statement, which is required by the hpvmmodify command to change a Virtual FileDVD,
use the hpvmstatus -D command.
9.2.2.3.6 Virtual NullDVDs
A Virtual NullDVD is an emulated SCSI DVD-ROM with no virtual media currently present. The next
media selection may come from a VSP CD/DVD drive or VSP ISO file, depending on how the
Virtual NullDVD is configured. Once the next media is selected, the Virtual NullDVD turns into
either a Virtual DVD (see Section 9.2.2.3.4 (page 129)) or a Virtual FileDVD (see Section 9.2.2.3.5
(page 130)) device. As such, a Virtual NullDVD is a transitory state of an empty virtual DVD type.
The choice of how to configure a Virtual NullDVD depends on the access that the VSP administrator
gives to the guest administrator. Virtual DVD changes can be initiated from the virtual console (see
Section 9.3.1.3 (page 137)). All virtual DVD changes by the guest administrator are constrained
by the actions of the VSP administrator.
If the VSP administrator gives access to the guest administrator to load and unload physical media
on the VSP CD/DVD drive, the Virtual NullDVD can be set up with the following form of the resource
specification:
dvd:avio_stor::null:/dev/rdisk/disk#
where /dev/rdisk/disk# is an HP-UX esdisk character device file that points to the VSP
CD/DVD drive.
This is the same as setting up a Virtual DVD (see Section 9.2.2.3.4 (page 129)), except that the
VSP CD/DVD might not contain media. The media is expected to come from the guest administrator,
who should have access to the VSP to make such physical media changes. For example:
# ioscan -NfunC disk
disk 7 64000/0xfa00/0x6 esdisk CLAIMED DEVICE
TEAC DW-224E
/dev/disk/disk7 /dev/rdisk/disk7
# diskinfo /dev/rdisk/disk7
SCSI describe of /dev/rdisk/disk7:
vendor: TEAC
product id: DW-224E
type: CD-ROM
size: 0 Kbytes
bytes per sector: 0
In this example, the Virtual NullDVD resource statement is
dvd:avio_stor::null:/dev/rdisk/disk7.
If the VSP administrator does not want to give access to the VSP CD/DVD drive to the guest
administrator, you can set up a Virtual NullDVD to a file system directory containing the ISO files
that the guest administrator wants to access. This resource statement would take the following form:
dvd:avio_stor::null:/pathname
where /pathname is the file system directory where the ISO files are located.
This is the same as setting up a Virtual FileDVD (see Section 9.2.2.3.5 (page 130)), except that the
file is not specified. By specifying a file directory, the guest administrator can choose which ISO
files to use from the virtual console. The file directory must be a locally mounted VxFS file system.
NFS file systems are not supported. If the ISO files are world writable, they are not available from
the virtual console. For the following ISO files:
9.2 Configuring vPar/VM storage 131