Adaptec 1130U2 - Storage Controller RAID)- U2W SCSI 80 MBps Specifications download pdf (Page 171)

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.

Enable parallel remediation for

hosts in cluster

Update Manager can remediate hosts in clusters in a parallel manner.

Update Manager continuously evaluates the maximum number of hosts it

can remediate in parallel without disrupting DRS settings. If you do not

select the option, Update Manager remediates the hosts in a cluster

sequentially.

By design only one host from a Virtual SAN cluster can be in a

maintenance mode at any time. Update Manager remediates hosts that are

part of a Virtual SAN cluster sequentially even if you select the option to

remediate them in parallel.

Migrate powered off and suspended

virtual machines to other hosts in

the cluster, if a host must enter

maintenance mode

Update Manager migrates the suspended and powered off virtual

machines from hosts that must enter maintenance mode to other hosts in

the cluster. You can select to power off or suspend virtual machines before

remediation in the Maintenance Mode Settings pane.

3 Click Apply.

These settings become the default failure response settings. You can specify different settings when you

configure individual remediation tasks.

Enable Remediation of PXE Booted ESXi 5.x Hosts

You can configure Update Manager to let other software initiate remediation of PXE booted ESXi 5.x hosts.

The remediation installs patches and software modules on the hosts, but typically the host updates are lost

after a reboot.

The global setting in the Update Manager Configuration tab enables solutions such as ESX Agent Manager

or Cisco Nexus 1000V to initiate remediation of PXE booted ESXi 5.x hosts. In contrast, the Enable patch

remediation of powered on PXE booted ESXi hosts setting in the Remediate wizard enables Update

Manager to patch PXE booted hosts.

To retain updates on stateless hosts after a reboot, use a PXE boot image that contains the updates. You can

update the PXE boot image before applying the updates with Update Manager, so that the updates are not

lost because of a reboot. Update Manager itself does not reboot the hosts because it does not install updates

requiring a reboot on PXE booted ESXi 5.x hosts.

Chapter 7 Upgrading and Migrating Your Hosts

VMware, Inc. 171

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