On Windows hosts, you can use the LPUTILNT utility to update the queue depth for Emulex HBAs and the SANsurfer HBA manager utility to update the queue depths for Qlogic HBAs.
Run the LPUTILNT utility located in the C:\\WINNT\system32 directory.
Select Drive Parameters from the menu on the right side.
Scroll down and double-click QueueDepth.
Note: If you are setting QueueDepth greater than 150, the following Windows Registry value also need to be increased appropriately: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\lpxnds\Parameters\Device\NumberOfRequests