Vector PC-Duo Technical Information download pdf (Page 37)

Host Installation

Generate unique HostIDs

Each PC-Duo Host installation is identified by a unique identifier, called the HostID. This

identifier is used by the PC-Duo Gateway to identify a Host, even as other information

about the Host, such as the machine name, may change. This identifier contains no

additional information and has no use other than to allow the PC-Duo Gateway to identify

individual Hosts on the network. The HostID is a GUID, a 16-byte number with a text

representation like “{C8E645A4-AF10-46f7-838B-A75105C8AA13}”.

If PC-Duo Host is installed on an operating system that is then imaged, all of the

machines will end up with the same HostID. PC-Duo Gateway will recognize the first Host

it sees with this HostID, but ignore any others with the same HostID. The result is that

many Hosts will not show up in the PC-Duo Gateway directory.

NOTE: This problem occurs independently of how the imaging or replication is done, and

affects PC-Duo Host v10.0 and later installations.

There are two strategies for dealing with this issue:

 The preferred solution is to prepare the Host installation for imaging before creating

the operating system snapshot to be duplicated. Just as you use the Microsoft-provided

“SysPrep” utility to prepare the operating system, you can use the PC-Duo Host

“HostPrep” utility to prepare the Host before imaging. This is described in the next

section.

 If a deployment has been completed and duplicate HostIDs exist on the network, the

PC-Duo Host “RmHostID” utility can be used to remove the duplicate HostIDs and cause

the affected machines to be assigned a new (and unique) ID. This is described later in

this document.

Prepare the Host and operating system for imaging

PC-Duo Host includes a utility program named hostprep.exe to address issues with

operating system imaging. The Hostprep utility appears in the PC-Duo Utilities file.

To avoid the problem of having duplicate HostIDs, the hostprep utility must be run to

delete the ID before the operating system image is captured.

NOTE: You must prepare the Host software for imaging just before you use the

Microsoft-provided SysPrep utility to prepare the operating system.

After the machine is set up and all Host settings are configured, and immediately before

running the Microsoft-provided SysPrep utility, run the hostprep.exe utility from a

command prompt. The optional command line argument “-y” can be used to avoid a

prompt to continue. When HostPrep runs, it stops the Host service and prepares the Host

for imaging. It is critical that the Host service not restart before the operating system

image is captured because when the Host starts, it undoes the actions completed by the

HostPrep utility.

For more information about operating system imaging, please see the Microsoft TechNet

Desktop Deployment Center at

http://www.microsoft.com/technet/desktopdeployment/

HostPrep command line syntax

HostPrep accepts a command line flags that control its behavior:

 -y do not ask for confirmation; default is to prompt before continuing

 -yes same as „-y‟

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