Troubleshooting Oracle F640 Flash Card Cooling
Maintaining the proper internal operating temperature of the server is crucial to the health of the server. To prevent server shutdown and damage to components, address overtemperature and hardware-related issues as soon as they occur.
Use the status indicator LEDs to determine the status of Oracle Flash Accelerator F640 PCIe Card v2. The LEDs provide key status information to diagnose Oracle F640 Flash Card issues. See Status Indicators.
Oracle F640 Flash Card is designed to provide continuous full bandwidth performance with temperatures up to 73°C. Qualified host platforms with required software updates operate with sufficient margin to the maximum temperature under worst case environments. Should the system exceed the maximum operating temperature, or a system fault occur that causes internal temperatures of the flash memory modules to rise above this limit, Oracle F640 Flash Card responds as follows:
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73°C – Drive write throttling is engaged to reduce Oracle F640 Flash Card power.
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Oracle F640 Flash Card amber status indicator LED is lit, Service Action Required.
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Temperature warning is displayed in utility output.
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78°C – Additional drive write throttling is engaged.
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Oracle F640 Flash Card amber status indicator LED is lit, Service Action Required.
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Critical temperature status is displayed in utility output.
Caution - Sustained critical temperatures might cause data loss.
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Oracle Flash Accelerator F640 PCIe Cards have an internal temperature sensor with an accuracy of +/-2°C over a range of -10°C to +85°C which can be monitored using the NVMe Health Log. For more information on sensor reading, refer to the SMART attributes. In addition, Oracle F640 Flash Cards provide out-of-band access to temperature by means of an SMBUS. The sensor has an accuracy of +/-3°C over a range of -20°C to 125°C. SMBUS temperature sensor is not reported in NVMe Health Log. Oracle F640 Flash Card thermal parameters are:
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Tstart – Throttling starts
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Tmax – Maximum throttling is applied
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Pmaxdrop – Maximum drop allowed determined by the internal setting
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Thysteresis – 2°C set during the cooling phase to prevent rapid oscillations between throttle states. The temperature must reach the hysteresis level to return the power ceiling back to previous levels.
The following image shows Oracle F640 Flash Card temperature sensor location.
(1): Oracle F640 Flash Card temperature sensor location
Refer to the server documentation for additional service information.