UCS hot add/replace memory/CPU

[TsapkoDmitry]

Hello. As I know on cisco UCS C460 we can extend amount of memory with the help of memory riser boards. Memory riser boards are hot swappable. Does it mean that when I run Win2008R2 Datacenter on c460 server I can hot add and replace memory at riser memory board?

Can I hot replace memory on motherboard slots?

Which models of UCS servers do support hot CPU add/replacement?

[Robert Burns · Accepted solution]

Dmitry,

Yes the memory risers are hot swappable, so assuming the bare metal OS can support hot-add memory it will work.

There are no DIMM slots on the motherboard directly on the C460.  The memory riser is the only motherboard interfaces for memory.

There's no such thing to my knowledge as hot-add CPU on any Cisco platforms.

Refer to the HW Install Guide for more information:

http://www.cisco.com/en/US/docs/unified_computing/ucs/c/hw/C460/install/replace.html#wp1160169

Regards,

Robert

[TsapkoDmitry]

Thank you for answer.

I compared last models of UCS servers, and find out that only UCS C460 supports hot-add/replace memory, and I created small list of hot-swappable parts. May be it will helpful for somebody.

Server	cpu	memory	Power supplies	PCIe risers/PCIe slots	Cooling fans	HDD
C260M2	no	no	yes	no/no	yes	yes
C460M2	no	yes	yes	-/4 yes and 6 no	yes	yes
C220M3	no	no	yes	no/no	yes	yes
C22 M3	no	no	- (1 power supply)	no/no	no	yes
C24M3	no	no	yes	no/no	yes	yes
C240M3	no	no	yes	no/no	yes	yes
C420M3	no	no	yes	no/no	yes	yes

table fixed

[Robert Burns]

Dmitry - Great table. 

One correction.

All platforms have hot swap HDDs.  It's actually recommended to never swap HDDs with the server powered off with any LSI controllers.

Regards,

Robert

[TsapkoDmitry]

Thank you for correction and remark.