Specifications

Errors and Warnings Returned by the Installation and Upgrade Precheck Script
The installation and upgrade precheck script runs tests to identify problems on the host machine that can
cause an installation, upgrade, or migration to fail.
For interactive installations, upgrades, and migrations, the errors or warnings are displayed on the final
panel of the installer, where you are asked to confirm or cancel the installation or upgrade. For scripted
installations, upgrades, or migrations, the errors or warnings are written to the installation log.
vSphere Update Manager provides custom messages for these errors or warnings. To see the original errors
and warnings returned by the precheck script during an Update Manager host upgrade scan, review the
Update Manager log file vmware-vum-server-log4cpp.log.
Table 6‑9. Error and Warning Codes That Are Returned by the Installation and Upgrade Precheck Script
Error or Warning Description
64BIT_LONGMODESTATUS The host processor must be 64-bit.
COS_NETWORKING Warning. An IPv4 address was found on an enabled
Service Console virtual NIC for which there is no
corresponding address in the same subnet in the vmkernel.
A separate warning will be output for each such
occurrence.
CPU_CORES The host must have at least two cores.
DISTRIBUTED_VIRTUAL_SWITCH If Cisco's Virtual Ethernet Module (VEM) software is found
on the host, the test checks to make sure the upgrade also
contains the VEM software, and that it supports the same
version of the Virtual Supervisor Module (VSM) as the
existing version on the host. If the software is missing or is
compatible with a different version of the VSM, the test
returns a warning, and the result indicates which version
of the VEM software was expected on the upgrade ISO and
which version, if any, were found. You can use ESXi Image
Builder CLI to create a custom installation ISO that
includes the appropriate version of the VEM software.
HARDWARE_VIRTUALIZATION Warning. If the host processor doesn't have hardware
virtualization or if hardware virtualization is not turned on
in the host BIOS, host performance will suffer. Enable
hardware virtualization in the host machine boot options.
See your hardware vendor's documentation.
MD5_ROOT_PASSWORD This test checks that the root password is encoded in MD5
format. If a password is not encoded in MD5 format, it
might be significant only to eight characters. In this case,
any characters after the first eight are no longer
authenticated after the upgrade, which can create a security
issue. To work around this problem, see VMware
Knowledge Base article 1024500.
MEMORY_SIZE The host requires the specified amount of memory to
upgrade.
PACKAGE_COMPLIANCE vSphere Update Manager only. This test checks the existing
software on the host against the software contained on the
upgrade ISO to determine whether the host has been
successfully upgraded. If any of the packages are missing
or are an older version than the package on the upgrade
ISO, the test returns an error and indicates which software
was found on the host, and which software was found on
the upgrade ISO.
Chapter 6 Upgrading and Migrating Your Hosts
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