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Windows Server single-path and MPIO configuration recommendations for SC Series storage
33 Dell EMC SC Series Storage and Microsoft Multipath I/O | CML1004
Disable Nagle’s Algorithm: To disable delayed ACK and Nagle’s algorithm, create the following DWORD
32-bit entries for each SAN interface subkey in the Windows Server registry:
HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\<SAN
interface GUID>
• Create or verify these DWORD 32-bit entries. Set them to a value of 1 (disabled).
TcpAckFrequency
TcpNoDelay
Disable NIC Interrupt Modulation:
1. Click Adapter Settings.
2. Right-click the adapter and select Properties.
3. Under the Networking tab, click Configure.
4. Under the Advanced tab, select Interrupt Moderation and choose Disabled.
Note: A reboot is required for any registry changes to take effect. Alternatively, unloading and reloading the
initiator driver will also cause the change to take effect. In the Device Manager GUI, under Storage
controllers, right-click Microsoft iSCSI Initiator, and select Disable to unload the driver. Then, select
Enable to reload the driver.