Owners Manual
Table Of Contents
- Dell EMC PowerEdge C6420 Installation and Service Manual
- Dell EMC PowerEdge C6420 overview
- Initial system setup and configuration
- Installing and removing enclosure components
- Safety instructions
- Before working inside your system
- After working inside your system
- Recommended tools
- Dell EMC PowerEdge C6420 sled
- PERC battery
- Air shroud
- System memory
- Support bracket
- Linking board and PCIe cable
- Processor and heat sink module
- Removing a processor and heat sink module
- Installing a processor and heat sink module
- Removing the fabric processor from the processor heat sink module
- Installing the fabric processor into the processor heat sink module
- Removing the non-fabric processor from the processor and heat sink module
- Installing the non-fabric processor into a processor and heat sink module
- Removing the fabric and sideband cables
- Installing the fabric and sideband cables
- Expansion cards
- PCIe slot priority
- Removing the expansion card riser assembly
- Installing the expansion card riser assembly
- Removing an expansion card
- Installing an expansion card
- Removing the riser card
- Installing the riser card
- Removing the M.2 SATA x16 riser
- Installing the M.2 SATA x16 riser
- Removing the M.2 SATA card
- Installing the M.2 SATA card
- M.2 SSD module
- Mezzanine and OCP cards
- System battery
- System board
- Trusted Platform Module
- System diagnostics
- Jumpers and connectors
- Getting help
- Documentation resources
Table 8. Memory operating modes
Memory Operating Mode Description
Optimizer Mode The Optimizer Mode if enabled, the DRAM controllers operate independently in the
64-bit mode and provide optimized memory performance.
Mirror Mode The Mirror Mode if enabled, the system maintains two identical copies of data in
memory, and the total available system memory is one half of the total installed physical
memory. Half of the installed memory is used to mirror the active memory modules.
This feature provides maximum reliability and enables the system to continue running
even during a catastrophic memory failure by switching over to the mirrored copy.
The installation guidelines to enable Mirror Mode require that the memory modules be
identical in size, speed, and technology, and they must be populated in sets of 6 per
processor.
Single Rank Spare Mode Single Rank Spare Mode allocates one rank per channel as a spare. If excessive
correctable errors occur in a rank or channel, while the operating system is running, they
are moved to the spare area to prevent errors from causing an uncorrectable failure.
Requires two or more ranks to be populated in each channel.
Multi Rank Spare Mode Multi Rank Spare Mode allocates two ranks per channel as a spare. If excessive
correctable errors occur in a rank or channel, while the operating system is running, they
are moved to the spare area to prevent errors from causing an uncorrectable failure.
Requires three or more ranks to be populated in each channel.
With single rank memory sparing enabled, the system memory available to the operating
system is reduced by one rank per channel.
For example, in a dual-processor configuration with sixteen 16 GB single-rank memory
modules, the available system memory is: 3/4 (ranks/channel) × 16 (memory modules)
× 16 GB = 192 GB, and not 16 (memory modules) × 16 GB = 256 GB. For multi rank
sparing, the multiplier changes to 1/2 (ranks/channel).
NOTE: To use memory sparing, this feature must be enabled in the BIOS menu of
System Setup.
NOTE: Memory sparing does not offer protection against a multi-bit uncorrectable
error.
Dell Fault Resilient Mode The Dell Fault Resilient Mode if enabled, the BIOS creates an area of memory that is
fault resilient. This mode can be used by an OS that supports the feature to load critical
applications or enables the OS kernel to maximize system availability.
NOTE: This feature is only supported in Gold and Platinum Intel processors.
NOTE: Memory configuration has to be of same size DIMM, speed, and rank.
Optimizer Mode
This mode supports Single Device Data Correction (SDDC) only for memory modules that use x4 device width. It does not
impose any specific slot population requirements.
● Dual processor: Populate the slots in round robin sequence starting with processor 1.
NOTE: Processor 1 and processor 2 population should match.
Table 9. Memory population rules
Processor Configuration Memory population Memory population information
Single processor Optimizer (Independent
channel) population order
1, 2, 4, 5 Odd amount of DIMMs per
processor allowed.
Mirror population order {1, 2, 3, 4, 5, 6} Mirroring is supported with 6
DIMMs per processor
32 Installing and removing enclosure components