Chapter 3 Maintaining the Server

Installing or Replacing Server Components

•Although 1600 MHz DIMMs can be run in Power Saving Mode (1.35 V operation), 1600 MHz operation is supported only when the DDR mode is set to Performance Mode (see “Enabling Low-Voltage DIMM Operation (Power Saving Mode).”) When the DDR mode is set to Power Saving Mode, a 1600 MHz DIMM operates at 1066 MHz.

•Observe the DIMM mixing rules shown in Table 3-4.

Table 3-4

DIMM Mixing Rules

 

 

 

 

DIMM Parameter Mixed

Mix Across Single Channel?

Mix Across Multiple Channels?

 

 

 

DIMM size (4, 8, 16, or

No—Must be same size in

Yes—Can be different sizes in server.

32 GB)

 

channel.

 

 

 

 

DIMM speed (1333 or

No—Must be same speed in

No—Must be the same speed in server.

1600 MHz)

 

channel.

 

 

 

 

DIMM type (U-DIMM or

No—Must be same type in

No—Must be the same type in server.

R-DIMM)

 

channel.

 

 

 

 

 

•Memory mirroring reduces the amount of memory available by 50% because only one of the two populated channels provides data. When memory mirroring is enabled, DIMMs must be installed in sets of 4, 6, or 8 as described in Memory Mirroring, page 3-21.

•Note the following restrictions when using UDIMMs. Even though a UDIMM might be rated at 1600 MHz, actual operational speeds are slower because of the Intel implementation.

–In Performance Mode (1.5 V operation), UDIMMs run at 1333 MHz in 1 DPC and 2 DPC configurations.

–In Power Saving Mode (1.35 V operation), UDIMMs run at 1066 MHz in 1 DPC and 2 DPC configurations.

Enabling Low-Voltage DIMM Operation (Power Saving Mode)

You can enable low voltage (1.35 V) DIMM operation for all DIMMs in the server. There is a setting in the BIOS Setup utility that you can use to change the DDR memory mode to Power Saving mode, as described in the following procedure:

Step 1 Enter the BIOS setup utility by pressing the F2 key when prompted during bootup.

Step 2 Select the Advanced tab.

Step 3 Select Low Voltage DDR Mode.

Step 4 In the pop-up window, select either Power Saving or Performance Mode:

•Power Saving Mode–Prioritizes low-voltage memory operation.

•Performance Mode–Prioritizes performance memory operation. If you mix low-voltage DIMMs with standard DIMMs, the system defaults to this setting.

Step 5 Press F10 to save your changes and exit the setup utility.

 

Cisco UCS C220 Server Installation and Service Guide

3-20

OL-25760-01

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Cisco Systems UCSSP6C220E, UCUCSEZC220M3S, UCSRAID9266CV, 9266CV-8i Enabling Low-Voltage Dimm Operation Power Saving Mode
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UCSRAID9266CV, C220, 9266CV-8i, UCSSP6C220E, UCUCSEZC220M3S specifications

Cisco Systems offers a range of powerful solutions for data center and enterprise infrastructures, among which are the UCSSP6C220E and UCUCSEZC220M3S, as well as the UCS C220 servers and the 9266CV-8i RAID controller. These products are designed to deliver high performance, scalability, and reliability, making them ideal for mission-critical applications across various industries.

The UCSSP6C220E is an essential component for the Cisco Unified Computing System (UCS) environment. It is designed for exceptional performance in virtualization and cloud computing environments. Key features include support for Intel Xeon Scalable processors, allowing for improved processing power and efficiency. Additionally, the server supports numerous memory configurations, with support for up to 3TB of RAM using 24 DIMM slots. With its innovative design, the UCSSP6C220E provides efficient cooling and power management, ensuring optimal performance under heavy workloads.

The UCUCSEZC220M3S model further enhances the capabilities of Cisco UCS with its flexible storage options and advanced management features. It supports multiple networking technologies, enabling seamless integration into existing IT infrastructures. The server's scalability is a significant benefit, accommodating a wide variety of workloads from virtualization to high-performance computing.

The UCS C220 series is a versatile platform known for its balance of performance, storage, and density. It is ideal for running more applications while minimizing data center space. The C220 server can support both SAS and SATA drives, enabling businesses to choose the right storage solution for their specific needs.

The 9266CV-8i RAID controller is a robust solution designed to enhance data protection and performance. It supports RAID levels 0, 1, 5, 6, 10, 50, and 60, providing multiple options for balancing performance and redundancy. With 1GB of integrated cache memory, it helps accelerate data access, while its eight internal ports ensure high connectivity and flexibility for storage expansions.

Coupled with the UCSRAID9266CV, this controller simplifies storage management with advanced features such as online capacity expansion and dynamic RAID migration. Together, these technologies help organizations optimize their data centers while ensuring high availability and reliability, making Cisco Systems’ offerings a cornerstone for enterprise IT infrastructures.
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