task sequence

Automatically Select a Configuration Manager Task Sequence

With Configuration Manager, we have a great amount of power and control over how we deploy computers using Task Sequences. Many people go to great lengths to make their operating system deployment experience a great one be it for end-users with User Driven Installation or for their support technicians driving the builds instead. One way which we can streamline the process is to use a consolidated task sequence which handles all of our various operating systems, languages, drivers and applications in a single task sequence with intelligence.

If you have gone to the great lengths to make this happen in your environment, you may be left with a sinking feeling that everytime you PXE Boot or USB Media Boot a client to deploy, you still have to select a task sequence to run even though you only have one as shown in the sample below.

Select TS Task Sequence Wizard

Luckily, we have a solution to this and a way to allow us to skip the Task Sequence Selection wizard and automatically enter our one task sequence to rule them all and it is done using Prestart Commands on our Boot Images in Configuration Manager. You don’t need MDT or any other fancy software integration with Configuration Manager to do this as it is done using the default boot images.

To start, we need to know the Deployment ID for the Task Sequence. This is not to be confused with the Package ID. The Deployment ID is the unique ID assigned to a single instance of the task sequence deployed to a collection.

We can get the Deployment ID for the Task Sequence by navigating to the Software Library portion of the Configuration Manager Administration Console and then expanding Operating Systems followed by Task Sequences and then locate your sequence from any folder structure you may have created. With the Task Sequence selected, the lower half of the screen will show the summary properties for it. Click the Deployments tab at the bottom here to see where your Task Sequence is deployed, in my example, to the All Systems collection.

In this area, right-click on the column titles and add the Deployment ID column to the view. This is the value we need.

Task Sequence Deployment ID

With this value in hand, we now need to create a very simple VBScript file. I store this file in a directory called OSD Prestart Files on my Primary Site Server but where you store it is up to you. Create a VBScript with the following contents.

Set DefaultOSDTS = CreateObject("Microsoft.SMS.TSEnvironment")
DefaultOSDTS("SMSPreferredAdvertID") = "RJG20008"

In your case, you will need to change the value of DefaultOSDTS to the Deployment ID shown in your console. My Deployment ID was RJG20008 as set.

Once you have created and saved this file, head over to the Boot Images section of the Operating System portion in the Software Library and view the Properties for your boot image.

Boot Image Prestart Command Setting

As you can see from the image above, we need to check the box for the option Enable Prestart Command on the Customisation tab of the properties. Once this is checked, we can add the command to call our VBScript file which in my case will be cscript AutoStartOSD.vbs. Once you have entered this, check the box for Include files for the prestart command and specify the path to the script file you created so that this file is integrated into the Boot Image file.

When you save the changes, you will be prompted to update your Boot Image files and the file will be rebuilt and updated on your Distribution Points. Once complete, if you are using PXE to boot your clients you need to do nothing more and you can start enjoying your automatically starting task sequence. If you are using USB or ISO Boot Media to start your task sequence process, you will need to update your image as the Boot Image that the media is based on has been updated.

Configuration Manager 2012 OSD Fails After Restart

I was working today testing the operating system deployment capability of System Center Configuration Manager 2012 (not R2) for a Windows 7 task sequence. In the environment, I am using a VMware vSphere virtual machine as my target for the deployment but sadly, the networks available to the host don’t have access to client DHCP enabled VLANs which means that everything needs to be done manually including booting the pre-execution environment as there is no way of getting this from the network as without DHCP to provide the Option Codes 66 and 67 which contain the TFTP server name and the boot image path the client doesn’t know what to do.

By creating a .iso file using the Bootable Media Wizard in Configuration Manager and attaching the .iso file to the virtual machine we can boot into the pre-execution environment. Ensure that Connect at Power On is selected for the .iso file attached to the virtual machine so that you can actually boot from it. Configuration Manager 2012 environment welcomes you with a boot media welcome panel which allows you to set a static IP address and other network parameters you may need to be able to contact the Management Point and Distribution Point roles for the Configuration Manager deployment.

Once the Operating System Deployment (OSD) Task Sequence (TS) has reached the point at which it applies the Windows operating system .wim image to the target computer however, it restarts and exits Windows PE environment and boots into the Windows operating system from the local disk and applies an overlay user interface so that you continue to see the task sequence progress. At this point, if you are unable to reach a DHCP server, the task sequence will fail as the static address set in Windows PE is lost due to the transition between environments.

In order for your task sequence to continue successfully, you need to set a static IP address on the client. The issue herein however lies in the fact that you need to be quick. If you aren’t quick enough, the Task Sequence will abort with an error code of 80070057. The easiest way to do this is to hit F8 which opens a command prompt and then enter the following commands.

netsh interface ipv4 set address name=”Local Area Connection” static
netsh interface ipv4 set dnsservers name=”Local Area Connection” static primary

The IP addresses in both commands are examples so make sure you change the addresses to those which suit your environment. The first command sets the interface IP parameters on the client and the second command sets the DNS server address to use for name resolution. The first command is in the format IP Address, then Subnet Mask and finally the Default Gateway.

If your machine has multiple network adapters installed, the Name parameter will be different for each of the adapters. To further confuse matters, the above command works for Windows 7. If you are using Windows 8 or Windows 8.1 then you need to change the default interface name from Local Area Connection to Ethernet as this is the new naming standard used Windows 8 and onwards. netsh interface show interface or good old ipconfig will give you a list of the interfaces and their physical connection status if you are in any doubt in either situation.