Making Devices Shareable

Only read-only devices can be shared among guests. Virtual DVDs and virtual network devices can be shared. DVDs are not shareable unless you specify otherwise. Sharing virtual devices or the hardware backing stores must be carefully planned in order to prevent data corruption.

Virtual network devices are assumed to be shareable devices. However, the physical network devices backing them are not shareable.

You can make a virtual DVD device shareable by entering the following command:

# hpvmdevmgmt -m gdev:/dev/rdsk/c0t0d0:attr:SHARE=YES

If a guest is set up to use a virtual disk backed by a logical volume, do not make changes to the logical volume while the guest is running. First, stop the guest by using the hpvmstop -g command. If you modify a logical volume that contains a guest's root, you must re-create the guest. Specifically:

To restrict a virtual network device so that it is no longer shareable, enter the following command:

# hpvmdevmgmt -m gdev:myswitch:attr:SHARE=NO

This command restricts the vswitch called myswitch to use by one guest only.

Do not make read/write disks shareable.