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UCS C240 M5 online spare memory

apereira3
Beginner
Beginner

Hello dears,

 

Please, could you help me with this question?

The Online Spare Memory feature is supported in UCS C240 M5?

 

 

I will apreciate your support!

Allyson

1 Reply 1

Kirk J
Cisco Employee
Cisco Employee

Greetings.

It appear memory mirroring is your memory HA type option

https://www.cisco.com/c/dam/en/us/products/collateral/servers-unified-computing/ucs-c-series-rack-servers/memory-guide-c220-c240-b200-m5.pdf

This basically reduces available memory to 50%, but all primary DIMMs are  mirrored...

 

NOTE: When memory mirroring is enabled, the memory subsystem simultaneously
writes identical data to two DIMMs. If a memory read from primary DIMM returns
incorrect data due to an uncorrectable memory error, the system automatically
retrieves the data from the secondary DIMM in the mirrored pair. Thus, an error in
one DIMM does not affect the mirrored data, and operation continues unless the
error propagates to both the DIMMs in the mirrored pair. Memory mirroring reduces
the amount of memory available to the operating system by 50% because only one of
the two DIMMs in the mirrored pair provides data.

 

Thanks,

Kirk...

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