Dell PowerEdge M620 Manuel technique - Page 20

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Dell PowerEdge M620 Manuel technique
Feature
Recovery from single
DRAM device failure
(SDDC)
Failed DIMM isolation
Memory mirroring:
intra-socket
Memory address parity
protection
Memory sparing (rank)
Memory thermal
throttling
For information on memory mirroring and sparing configurations, see the
Systems Owner's Manual
Description
Recovery from Single DRAM Device Failure (SDDC) provides error checking and
correction that protects against any single memory chip failure as well as multi-bit
errors from any portion of a single memory chip.
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 is a method of keeping a duplicate (secondary or mirrored)
copy of the contents of memory as a redundant backup for use if the primary
memory fails. The mirrored copy of the memory is stored in memory of the same
processor socket.
This feature provides the ability to detect transient errors on the address lines of
the DDR channel.
Memory sparing allocates one rank per channel as a spare. If excessive correctable
errors occur in a rank or channel, they are moved to the spare area while the
operating system is running to prevent the errors from causing an uncorrectable
failure.
This feature helps to optimize power/performance and can also be used to
prevent DIMMs from overheating.
on Support.Dell.com/Manuals. Memory RAID is not supported.
Dell PowerEdge M620