Adequate System Cooling - SanDisk Fusion ioMemory ioDrive2 Hardware Installation Manual

Fusion ioMemory Hardware Installation Guide | Rev 80-11-71092
ATTENTION!
Refer to the matrix to determine if your slot provides 75W. The fio-status and fio-pci-check utilities
may incorrectly display a 75W slot as a 25W slot.
The following are important considerations:
If you are installing more than one dual Fusion ioMemory device, and enabling the override parameter for each
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device, make sure the motherboard is rated to provide 55W power to each slot used.
ATTENTION!
For example, some motherboards safely provide up to 75W to any one slot, but run into power constraints
when multiple slots are used to provide that much power. Installing multiple devices in this situation may
also result in server hardware damage. Consult with the manufacturer to determine the total PCIe slot
power available.
The override parameter, if enabled correctly, will persist in the system, and will enable full power draw on an
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enabled device even if the device is removed and then placed in a different slot within the same system. If the
device is placed in a slot that is not rated to provide 55W of power, then you may damage your server hardware.
This override parameter is a setting for the Fusion ioMemory VSL software per server, and is not stored in the
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device. When moved to a new server, the device will default to the 25W power limit until an external power cable
is added or this override parameter is enabled for that device in the new server. Consult with the manufacturer to
determine the total PCIe slot power available for the new server.

Adequate System Cooling

300 LFM: To maximize the longevity and performance of Fusion ioMemory devices, we recommend at least 300 Linear
Feet per Minute (LFM) of airflow across the devices.
55°C Maximum: The ambient air temperature around the device should not exceed 55°C.
Device Thermal Monitoring: In order to protect against thermal damage, all Fusion ioMemory devices monitor the
temperature of its onboard controller chip (This is reported by the fio-status command-line utility as Internal
temperature). Newer devices, such as Fusion ioMemory ioDrive2 devices, also monitor the NAND boards to prevent
overheating of the NAND flash components (reported by fio-status, using the -fj or -fx options, as nand_
thermal_deg_c). If your device is throttled or shuts down due to thermal issues, the fio-status utility will print a
warning and indicate whether the cause was the FPGA Junction (controller) or the NAND Temperature.
In an attempt to contain temperatures within an optimal range, the Fusion ioMemory VSL software will start
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throttling write performance once the controller temperature or NAND board reaches a set temperature.
If the controller or NAND board temperature continues to rise, the software will shut down the device once the
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maximum operating temperature is reached.
The throttling and shutdown temperature depends on the device. Some devices detect the NAND board temperature,
while others do not.
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