HP LeftHand SAN Solutions Support Document - Application Notes - Best Practices for Enabling Microsoft Windows with SAN/iQ®

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5 Within CurrentControlSet, navigate to and expand:
\Control\Class\{4D36E97B-E325-11CE-BFC1-08002BE10318}
Note: “97B” are the differentiating characters in the appropriate
registry key.
6 Under the key described in step 4, locate and expand the instance that has
the plus (+) sign next to it. In the example below, this would be
instance 0000.
7 Click the + sign next to the expandable instance, then select the
Parameters key. This will reveal a list of available values in the right pane
of the window.
8 Right-click the Parameters key described above.
9 From the drop-down menu click New, then click DWORD Value.
10 A new value entry will appear on the right side of the screen. Name the
new value MaxRequestHoldTime, then press Enter on your keyboard.