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For the last several months, there has been a lively debate in the industry about Emulex’s choice to use heat sinks on our 8Gb/s host bus adapters (HBAs). In contrast, QLogic, another market participant, chose not to put a passive cooling device on their HBA. But their decision can leave customers burned.
Citation preview
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Passive Cooling Technology
From Emulex Labs
Emulex – Reliability by Design
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Emulex LPe12000 Familyvs
QLogic QLE2562 Family
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Testing Procedure
No Airflow– Server fans blocked off to prevent airflow– Lab HVAC system may have had some effect
Heat Soak– A minimum of 10 minutes was allowed for the parts to reach a stable temp, HBA ports idle of
I/O traffic but ports are looped back
Calibration– Spot temps were checked with a Omega contact thermocouple– HBAs were painted flat black to prevent reflections– The cameras general emissivity was adjusted to .92 to match the reflection properties of the
painted surface and to coincide with the Omega temps
IR Camera– Electrophysics Hotshot HD-S
• 640x480 IR imager – +/-2c accuracy spec - -20c-350c calibrated
Test Bench
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• LPe12002 operates 27◦ F cooler than QLE2562• Why is this significant?
• Reduces heat stress• Reduces thermal cycles
• Benefits of cooler operation:• Increase server reliability• Improve SAN availability
Increase Server Reliability
QLogic QLE2562Emulex LPe12002
Max = 121○ F Max = 148○ F
150
80
°
140
130
120
110
100
90
◦ Fah
renh
eit
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Emulex I/O controller operates 12◦ F cooler than QLogic –even without a heat sink!
Emulex solutions are designed to work in broad range of server environments without :
– Sacrificing reliability– Impacting performance – Jeopardizing SAN availability
QLogic QLE2562Emulex LPe12002
More Reasons To Choose Emulex…
Max = 148○ F
Max = 136○ F150
80
°
140
130
120
110
100
90◦ F
ahre
nhei
t
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Heat stressed components generally exhibit lower reliability and system performance impacting:
– Device reliability– System availability– Network serviceability
Emulex 8Gb/s I/O controllerA operates cooler than QLogic’s 8Gb/s I/O controller, resulting in 166% greater MTBF performanceB
RAS Advantages of Emulex 8Gb/s HBAs
A: Junction Temperature
B: Calculation based on standard Bellcore methodology and assumes same die size
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So which HBA would data center administrators prefer to have operating in their servers?
Emulex HBAs provide the greatest level of reliability and SAN availability by operating cooler than the competition in a broader range of server environments
Emulex - The Choice is Clear
OR
QLogic QLE2562
Emulex LPe12002
The Cooler Running HBA The Hotter Running HBA
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The LPe12000 family with passive cooling provides superior reliability
– Optimize server performance – Improve SAN availability
Emulex has superior MTBF hours– Emulex’s 10 Million vs QLogic’s 7.6 million
Emulex LPe12002 operates 27º F cooler than QLogic QLE2562 running identical workloads
Emulex LPe12002 – Maximizes server performance– Increases server reliability– Reduces maintenance costs– Improves SAN availability
Emulex QLogic100
110
120
130
140
150
160
I/O Controller Temperature Performance
Tem
pera
ture
(F)
Competitive Overview – QLogicCooler Operation & Better Efficiency and MTBF
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Emulex LP21000 Family vs
QLogic QLE8042 Family
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Leverages similar passive cooling technology as the LPe12000 familyEmulex LP21002 provides greater reliability and energy savings than QLogic’s QL8042 FCoE CNA
– Lower Power Consumption• 19% less power than QLogic QLE8042
– Higher Reliability• Operate 28% cooler than QLogic QLE8042
Emulex LP21000 Family – A Better Solution
QLogic QLE8042Emulex LP21002
Max = 190○ F
Max = 148○ F
190
170180
80
16015014013012011010090
° ◦ F
ahre
nhei
t
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So which CNA would data center administrators prefer to have operating in their servers?
Emulex CNAs provide the greatest level of reliability and SAN availability by operating cooler than the competition in a broader range of server environments.
QLogic QLE8042Emulex LP21002
Emulex - The Choice is Clear
OR
The Hotter Running CNA
The Cooler Running CNA
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While competitors talk about reliability, Emulex delivers it
More Data center and IT professionals rely on Emulex than any other brand to ensure reliable server to SAN connectivityA
Emulex 8Gb/s Fibre Channel and FCoE CNA solutions are the clear choice for:
– Unrivaled performance– Uncompromised reliability
Emulex Is the Reliability Leader
March 2009 Survey
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Thank You
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