Microsoft inbox DSM may not perform well on system with many processors

The Microsoft DSM is intended to be a generic DSM that provides compatibility with a broad range of array hardware. Vendor DSM's may be able to take advantage of hardware-specific responses from the storage array and have the capability for greater performance. For example, a vendor-supplied DSM could take advantage of specific status codes to recover from I\O path failures more quickly than the generic Microsoft DSM. To reiterate:

• The Microsoft DSM should be used to obtain a basic level of functionality across a wide variety of arrays.  It is not intended for use in high performance scenarios.
• For scenarios where additional functionality or increased performance are desired, a vendor-provided DSM should be used.