Installation guide

4 (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 floppy
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.
5 Click Apply.
These settings become the default failure response settings. You can specify different settings when you
configure individual remediation tasks.
Configure Cluster Settings
For ESX/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.
NOTE Remediating hosts in parallel can improve performance significantly by reducing the time required for
cluster remediation. Update Manager remediates hosts in parallel without disrupting the cluster resource
constraints set by DRS.
Prerequisites
Connect the vSphere Client to a vCenter Server system with which Update Manager is registered, and on the
Home page, click Update Manager under Solutions and Applications. If your vCenter Server system is part
of a connected group in vCenter Linked Mode, you must specify the Update Manager instance to use, by
selecting the name of the corresponding vCenter Server system in the navigation bar.
Procedure
1 On the Configuration tab, under Settings, click ESX Host/Cluster Settings.
2 Select the check boxes for features that you want to disable or enable.
Option Description
Distributed Power Management
(DPM)
VMware DPM monitors the resource use of the running virtual machines in
the cluster. If sufficient excess capacity exists, VMware DPM recommends
moving virtual machines to other hosts in the cluster and placing the original
host into standby mode to conserve power. If the capacity is insufficient,
VMware DPM might recommend returning standby hosts to a powered-on
state.
If you do not choose to disable DPM, Update Manager skips the cluster on
which VMware DPM is enabled. If you choose to temporarily disable
VMware DPM, Update Manager disables DPM on the cluster, remediates
the hosts in the cluster, and re-enables VMware DPM after remediation is
complete.
High Availability (HA) admission
control
Admission control is a policy used by VMware HA to ensure failover
capacity within a cluster. If HA admission control is enabled during
remediation, the virtual machines within a cluster might not migrate with
vMotion.
If you do not choose to disable HA admission control, Update Manager skips
the cluster on which HA admission control is enabled. If you choose to
temporarily disable HA admission control, Update Manager disables HA
admission control, remediates the cluster, and re-enables HA admission
control after remediation is complete.
Fault Tolerance (FT)
FT provides continuous availability for virtual machines by automatically
creating and maintaining a secondary virtual machine that is identical to the
primary virtual machine. If you do not choose to turn off FT for the virtual
machines on a host, Update Manager does not remediate that host.
vSphere Upgrade
98 VMware, Inc.