How Do I Shrink the Disk Partitions on a Windows Source Server?

Symptom

When you use SMS to migrate a source server running Windows, the disks on the target server should be at least the size recommended on the Source Management page. Otherwise, the migration may fail. If you want to use an existing server as the target server and the server's disks are too small, you can shrink the source server disks to be no larger than the target server disks.

Possible Causes

For a migration to be successful, the target server disks must be at least as large as the source disks. If they are not, you need to either scale up the target server disk or shrink the source server disk. On a Windows server, you can shrink disk partitions of the source server using the Windows Disk Management tool.

Procedure

1. Choose Start, enter diskmgmt.msc in the search box.

   The Disk Management tool is displayed.

2. Right-click the partition of the disk you want to shrink and choose Shrink Volume.

   The Shrink Volume dialog box is displayed.

   

3. Enter the amount you wish to shrink the partition by in the Enter the amount of space to shrink in MB text box.

   

4. Click Shrink.
   The new space available is displayed as unallocated space.

   Figure 1 Disk partition after shrink
   
5. Sign in to the console.
6. Click Service List. Under Migration, click Server Migration Service.

   The SMS console is displayed.

7. In the navigation pane on the left, choose Servers.

   The server list is displayed.

8. Locate the source server to be deleted, and in the Operation column, choose More > Delete.

   You can also select the target source server and choose More > Delete in the upper left corner of the server list.

9. In the displayed Delete Server dialog box, click OK.
10. Report the information about the source server to SMS again.
    • If the Agent has been uninstalled from the source server, install the Agent again. For details, see Installing the Windows Agent.
    • If the Agent has been installed on your source server, restart the Agent to report the source server information to SMS.