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R350: Question regarding PSU redundancy options
Dear all,
I am currently planning a PowerEdge R350 system. However, there are some ordering options which I don't understand what the differences are and for which I could not find documentation so far.
One of them is the PSU options.
I want a redundant, hot-swappable PSU configuration. The configurator has however two options which seem relevant to me:
1. Dual, Hot-Plug, Redundant Power Supply (1+1), 600W
2. Dual, Hot-Plug, Power Supply Fully Redundant (1+1), 700W MM HLAC (200-240Vac) Titanium
I understand that the latter has 100W more power per PSU, and explicitly indicating "Titanium" may mean that the 700W PSU has a higher degree of efficiency than the 600W one. I don't plan to equip the system with many options or drives, so I should be fine with 600W.
But what is the difference between "Redundant" and "Fully Redundant"?
In the PSU section of the configurator, there is a link "Help me choose" but when clicking it I am just directed to the dell.com homepage.
I then grabbed the R350 "Technical Guide" document. In the section "Power", Table 17, it says "Dell's PSU portfolio includes intelligent features such as dynamically optimizing efficiency while maintaining availability and redundancy. Find additional information in the Power supply units section."
But, apart from the section "Power" where Table 17 resides in, there is no section entitled "Power supply units" and I cannot find details on the different PSU options in the rest of the document either.
Thanks in advance.
DELL-Chris H
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March 10th, 2023 06:00
Stan2030,
The differences are;
* PSU Redundant - Similar to A/B Grid Redundant, except that the PSUs are not grouped into grids. Instead, each PSU is an individual contributor to the server's power, allowing for more redundancy. This option is not available in every server.
Full Redundancy configurations
Run at full performance during normal operating conditions and after PSU redundancy loss (if a PSU goes down due to input loss or fault). FR is optimized for consistent performance, thus the minimum PSU capacity allowed will ensure that the platform configurations full performance power requirements can be supported.
Let me know if this helps.
stan2030
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March 10th, 2023 08:00
Dear @Alexander-36725 ,
I have exactly the same issue currently: I don't know what is meant by "redundant" vs. "fully redundant", I was not able to find documentation where this is explained and the answer(s) in this thread don't help me either since they don't react to the exact notions "redundant" vs. "fully redundant".
Have you been able to answer your question in the meantime?
Alexander-36725
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March 12th, 2023 14:00
Hey @stan2030 !
Nope sorry i dont think i ever realy fully grasped the difference:)
I am guessing that "fully redundant" means that the server can operate at max capacity if one PSU fails, but "normal redundant" perhaps means that it may continue to operate if some threshold hasnt been reached. Or something like that...