Dell PowerEdge M620 Technical Manual

Also see for PowerEdge M620: Command reference guide Glossary Owner's manual Administrator's guide Hardware reference manual

Contents

Dell PowerEdge M620 Technical Manual Manual pdf 19 page image

19 PowerEdge M620 Technical GuideDIMMtype DIMM 0 DIMM 1 DIMM 2 # ofDIMMsSpeed (MT/s)800 1066 1333 1600QR DR 2 ∞QR QR 2 ∞SR SR SR 3 ∞ ∞SR SR DR 3 ∞ ∞SR DR DR 3 ∞ ∞DR DR DR 3 ∞ ∞QR 1 ∞ ∞QR QR 2 ∞ ∞QR QR QR 3 ∞Reliability, availability, and serviceability (RAS) features help keep the system online and operationalwithout significant impact to performance, and can decrease data loss and crashing due to errors.RAS aids in rapid, accurate diagnosis of faults which require service. Table 9 describes the memoryRAS features supported on the M620.Feature DescriptionDense configurationoptimized profileIncreased memory reliability can be a result from this selectable platform profilethat adjusts parameters to reduce faults regarding refresh rates, speed,temperature and voltage.Memory demand andpatrol scrubbingDemand scrubbing is the ability to write corrected data back to the memory oncea correctable error is detected on a read transaction. Patrol scrubbing proactivelysearches the system memory, repairing correctable errors.Recovery from singleDRAM device failure(SDDC)Recovery from Single DRAM Device Failure (SDDC) provides error checking andcorrection that protects against any single memory chip failure as well as multi-biterrors from any portion of a single memory chip.Failed DIMM isolation This feature provides the ability to identify a specific failing DIMM channel pair,thereby enabling the user to replace only the failed DIMM pair.Memory mirroring:intra-socketMemory mirroring is a method of keeping a duplicate (secondary or mirrored)copy of the contents of memory as a redundant backup for use if the primarymemory fails. The mirrored copy of the memory is stored in memory of the sameprocessor socket.Memory address parityprotectionThis feature provides the ability to detect transient errors on the address lines ofthe DDR channel.Memory sparing (rank)Memory sparing allocates one rank per channel as a spare. If excessivecorrectable errors occur in a rank or channel, they are moved to the spare areawhile the operating system is running to prevent the errors from causing anuncorrectable failure.Memory thermalthrottlingThis feature helps to optimize power/performance and can also be used toprevent DIMMs from overheating.For information on memory mirroring and sparing configurations, see theDell PowerEdge M620Systems Owner’s Manual on Support.Dell.com/Manuals. Memory RAID is not supported.