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Table Of Contents
Table 101. Virtual Machine Downtime by Guest Operating System (Continued)
Guest Operating System Upgrade VMware Tools Upgrade Virtual Machine Compatibility
Solaris No downtime. Downtime to shut down and power on the virtual
machine.
FreeBSD No downtime. Downtime to shut down and power on the virtual
machine.
Mac OS X No downtime. Downtime to shut down and power on the virtual
machine.
Note For Linux guest operating systems, you must restart the virtual machine to load the new versions
of the VMXNET, VMXNET3, and PVSCSI drivers. You can also manually reload the drivers. To verify that
the drivers are configured in the Linux kernel and that the virtual hardware is available, see Knowledge
Base article, http://kb.vmware.com/kb/2050364. Manual restart is not required for the Linux guest
operating system using kernel version 3.10.
Planning Downtime for Virtual Machines
You can stagger virtual machine downtimes to accommodate a schedule convenient to you and your
customers.
For example:
n
If your virtual machine users are located in diverse time zones, you can prepare by migrating virtual
machines to specific hosts to serve a given time zone. This way you can arrange host upgrades so
that virtual machine downtime occurs transparently outside business hours for that time zone.
n
If your virtual machine users operate around the clock, you can delay downtime for their virtual
machines to normally scheduled maintenance periods. You do not need to upgrade any stage within a
certain time period. You can take as long as needed at any stage.
Upgrade the Compatibility of a Virtual Machine Manually
The virtual machine compatibility determines the virtual hardware available to the virtual machine, which
corresponds to the physical hardware available on the host machine. You can upgrade the compatibility
level to make additional hardware available to the virtual machine.
Important Upgrading virtual machine hardware might cause some applications or the operating system
to stop working properly. Perform a hardware version upgrade only if you need a feature that comes with
the newer hardware version.
Prerequisites
n
Create a backup or snapshot of the virtual machines. See Using Snapshots To Manage Virtual
Machines.
n
Upgrade VMware Tools. On Microsoft Windows VMs, the virtual machine might lose its network
settings if you upgrade the compatibility before you upgrade VMware Tools.
vSphere Virtual Machine Administration
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