HP Integrity Virtual Machines 4.3: Installation, Configuration, Administration

Agile = /dev/rchgr/autoch1
ESCTL = /dev/pt/pt_autoch1
The following are examples of CD/DVD burner device:
Agile = /dev/rdisk/disk7
ESCTL = /dev/pt/pt_disk7
Attached devices cannot be shared simultaneously across active virtual machines. Only one
active virtual machine can be given a particular attached device at a time. However, like virtual
devices, attached devices can be attached and detached dynamically across active virtual machines
(see Section 6.3 (page 113)). Also, as the device is being attached to a virtual machine, it cannot
be opened by the VM Host at the time of or during attachment.
Because tapes, media changers, and CD/DVD burners are not virtualized, media changes with
them must be done physically. Therefore, all media changes with attached devices must be done
by individuals with access to that physical storage. Changes to attached devices might require
the device to be unlocked from an active guest OS. Attached devices remain in the last lock state
the guest OS put it in when the device is detached or the virtual machine is shut down. Empty
devices are attached and are not locked.
No multipath solutions are available for attached devices on the VM Host. No multipath products
are supported in the virtual machine.
Manage attached devices to prevent the wrong virtual machines from viewing sensitive
information. You can display which virtual machines are currently using attached devices using
the hpvmstatus command.
6.2.2.4 NFS-Mounted Backing Stores for Root, Swap, and Dump
Integrity VM V4.3 support NFS-mounted backing stores for root, swap and dump. These
backing-store files can now be located in NFS-mounted file systems. The following configuration
requirements apply. These configuration requirements may be removed or changed in future
Integrity VM releases.
• NFS-mounted backing stores can be used only for the root (that is, boot) file system, swap
and dump. NFS-mounted cannot be used as file-backed virtual DVD drives.
• The maximum number of NFS-mounted backing stores per guest is four.
• NFS-mounted backing stores are supported only for HP-UX 11i v3 guests.
• NFS-mounted backing stores must be configured with AVIO.
• The following NFS mount options must be used by the VM Host when mounting an NFS
file system housing a guest's backing-store files:
— NFS Version 3
— TCP
— Hard
— IPv4 address or server host names mapping to IPv4 address
• The Integrity VM Host (NFS client) and the NFS server systems must reside in the same IP
subnet.
• Online VM Migration is supported for guests using NFS-mounted backing stores. For OVMM
to work successfully, both Integrity VM Hosts must mount the NFS file system housing the
guest's backing-store files using the identical syntax and mount options. Both the source
and target VM Hosts must have the NFS file system mounted at the time of the migration.
112 Creating Virtual Storage Devices