Lesson 1: Understanding the Windows 7 Deployment Process in VS .NET

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Lesson 1: Understanding the Windows 7 Deployment Process
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ChAPTER 6
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USING WDS WITH NON-PXE CLIENTS
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Not all computers have network interface adapters that support PXE, but you can still use WDS to deploy install images to computers that cannot download a boot image over the network. Using the Windows Deployment Services console, you can convert the standard Boot.wim image into a discover image. A discover image contains boot files and also enables the client to locate and connect to the WDS server. After the client connects to the server, the process of selecting and installing an install image is the same as on a PXE-compliant workstation. Discover images do not offer much value to administrators deploying the default Install.wim image because they might as well boot from the original Windows 7 installation disk. However, when you are deploying customized images, creating generic boot CDs containing a discover image can be much easier than burning a lot of individual images to DVDs. You also might find it a valuable alternative when deploying to older workstations that have CD, but not DVD, drives.
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CAPTURING IMAGES WITH WDS
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WDS does not provide tools for creating customized reference computer installations; for this, you must use MDT 2010 and/or Windows 7 AIK. However, you can use WDS as an alternative to the ImageX.exe utility to capture an image of a reference computer. With the files in the Boot.wim image from a Windows 7 disk or the WinPE.wim boot image from Windows 7 AIK, you can use WDS to create a capture image. A capture image is a bootable image that launches the Windows Deployment Services Image Capture Wizard on the reference computer. Using the wizard, you can select the volume you want to capture and automatically upload the install image back to the WDS server.
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DEPLOyING IMAGES By USING MULTICASTS
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For large-scale workstation deployments, one of the most useful features in WDS is its ability to deploy images by using multicast transmissions. Multicasting is a feature of the Internet Protocol (IP) that enables one system to transmit data to multiple destinations simultaneously. This is sometimes called a one-to-many transmission. Using unicasts also called one-to-one transmissions deploying an image to 10 computers requires the WDS server to transmit the same file 10 times to 10 different IP addresses. Because image files can be several gigabytes in size, this method can consume a large amount of network bandwidth. Deploying hundreds of workstations can therefore bring even the fastest network to a standstill. In WDS multicasting, the server transmits the image file only once, to a special multicast group address. The workstations to be deployed, on connecting to the server, join the group and begin receiving the transmission. When you configure a WDS server to use multicasting, you select an image file and specify how you want to initiate the transmission. Multicasts can start automatically when the first client requests the image, you can start them manually, or you can schedule them to start at a specific time, using the interface shown in Figure 6-4.
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ChAPTER 6
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Designing a Windows 7 Client Deployment Strategy
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figURE 6-4 Scheduling multicasts in Windows Deployment Services
Note
nEW in WinDOWs sERvER 2008 R2 WDs
In Windows Server 2008 R2, WDS has additional multicasting capabilities, such as support for IPv6 multicasts. you can also configure WDS to automatically disconnect clients that are running below a specified network transmission speed, or you can split the transmission into two or three sessions, running fast and slow, or fast, medium, and slow, using the Transfer Settings options shown in Figure 6-5. These options enable you to prevent one workstation from affecting the others in the multicast.
figURE 6-5 Multicast Transfer Settings in Windows Deployment Services
Lesson 1: Understanding the Windows 7 Deployment Process
ChAPTER 6
Using WDS with Windows 7 AIK or MDT 2010
Whenever you have to deploy images to workstations on your network, no matter what means you used to create those images, you can deploy them using WDS. Using WDS frees you from having to create boot disks and installation disks, and it also enables you to take advantage of its multicasting capabilities, thereby reducing the impact of the network deployment process on your network. When you use Windows 7 AIK or MDT 2010 to deploy workstations, you have to boot them several times. First, you have to boot your reference computer to install Windows 7. Then, you have to boot the reference computer again to capture an image of it. Finally, you have to boot the target workstations to deploy your images on them. You can use WDS to perform any of these boots, and as long as your workstations are PXE-compliant, you do not ever have to burn a boot disk. You can use the Boot.wim image from a Windows 7 installation disk, the WinPE.wim image provided with Windows 7 AIK, or a customized boot image created using MDT 2010. If you create your install images manually, using the tools in Windows 7 AIK, you can deploy them using WDS, just as you would the standard Install.wim image. If you use MDT 2010, you can boot your workstations by using WDS, but because MDT 2010 creates its own deployment share, there is no need to use WDS to deploy the install images.
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