Several new switches or parameters are added to the defragmentation console tool (defrag.exe) in Windows 7. The switches are /E, /H, /M, /T, /U & /X. Here is the entire list of parameters supported by defrag.exe (v6.1) in Windows 7:
| Switch | Description |
| /A | Perform analysis on the specified volumes. |
| /C | Perform the operation on all volumes. |
| /E | Perform the operation on all volumes except those specified. |
| /H | Run the operation at normal priority (default is low). |
| /M | Run the operation on each volume in parallel in the background. |
| /T | Track an operation already in progress on the specified volume. |
| /U | Print the progress of the operation on the screen. |
| /V | Print verbose output containing the fragmentation statistics. |
| /X | Perform free space consolidation on the specified volumes. |
Likewise, the following switches are dropped in Windows 7. Although the following switches are not listed when running "defrag.exe /?", Defrag.exe in Windows 7 still accepts these switches. It’s not clear if they’re left for backward compatibility. Perhaps we should wait for official note from Microsoft.
| Switch | Description |
| /R | Performs partial defragmentation (default). Attempts to consolidate only fragments smaller than 64 megabytes (MB). |
| /W | Performs full defragmentation. Attempts to consolidate all file fragments, regardless of their size. |
| /F | Forces defragmentation of the volume when free space is low. |
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