6.0.2

Procedure
1 Use the vSphere Client or the vSphere Web Client to connect to a vCenter Server system with which
Update Manager is registered.
2 Depending on the client you use to connect to vCenter Server perform the following steps.
Client Steps
vSphere Web Client 1 On the  tab, under Manage, click
Host/Cluster .
Click Edit.
vSphere Client 1 On the  tab, under Seings, click ESXi
Host/Cluster .
3 Under Maintenance Mode Seings, select an option from the VM Power state drop-down menu to
determine the change of the power state of the virtual machines and appliances that are running on the
host to be remediated.
Option Description
Power Off virtual machines
Powers o all virtual machines and virtual appliances before remediation.
Suspend virtual machines
Suspends all running virtual machines and virtual appliances before
remediation.
Do Not Change VM Power State
Leaves virtual machines and virtual appliances in their current power
state. This is the default seing.
4 (Optional) Select Retry entering maintenance mode in case of failure, specify the retry delay, and the
number of retries.
If a host fails to enter maintenance mode before remediation, Update Manager waits for the retry delay
period and retries puing the host into maintenance mode as many times as you indicate in Number of
retries eld.
5 (Optional) Select Temporarily disable any removable media devices that might prevent a host from
entering maintenance mode.
Update Manager does not remediate hosts on which virtual machines have connected CD/DVD or
oppy drives. All removable media drives that are connected to the virtual machines on a host might
prevent the host from entering maintenance mode and interrupt remediation.
After remediation, Update Manager reconnects the removable media devices if they are still available.
6 Click Apply.
These seings become the default failure response seings. You can specify dierent seings when you
congure individual remediation tasks.
Configure Cluster Settings
For ESXi hosts in a cluster, the remediation process can run either in a sequence or in parallel. Certain
features might cause remediation failure. If you have VMware DPM, HA admission control, or Fault
Tolerance enabled, you should temporarily disable these features to make sure that the remediation is
successful.
N Remediating hosts in parallel can improve performance signicantly by reducing the time required
for cluster remediation. Update Manager remediates hosts in parallel without disrupting the cluster
resource constraints set by DRS. Avoid remediating hosts in parallel if the hosts are part of a Virtual SAN
cluster. Due to the specics of the Virtual SAN cluster, a host cannot enter maintenance mode while other
hosts in the cluster are currently in maintenance mode.
Chapter 9 Upgrading Hosts
VMware, Inc. 159