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Adequate Power for Second Generation IBM High IOPS Duo Adapters
Second Generation IBM High IOPS Duo Adapters require more power than the minimum 25W provided by PCIe
Gen2 slots to properly function, and therefore
Without additional power, function will be limited with Second Generation IBM High IOPS Duo Adapters. For more
information on providing additional power via a power cable, see
Adapters
.
$body
Adequate System Cooling
300 LFM: To maximize the longevity and performance of IBM High IOPS Adapters, 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 IBM High IOPS Adapters monitor the
temperature of its onboard controller chip (This is reported by the
temperature"). Newer devices, such as IBM High IOPS Adapters, also monitor the NAND boards to prevent
overheating of the NAND flash components. If your device is throttled or shuts down due to thermal issues, the
ioMemory VSL software will log the event in the system logs.
In an attempt to contain temperatures within an optimal range, the ioMemory VSL software will start 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 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.
To find these temperatures limits for your device, find your device in the
Attention
High Performance/Power Mode
using IBM High IOPS Adapters. Also disable any power-saving modes. This improves performance in two
ways:
1.
Prevents operating systems and the BIOS from suspending PCIe devices (using ASPM), including IBM High
IOPS Adapters. IBM High IOPS Adapters do not support ASPM.
2.
Maintains higher fan speeds to prevent thermal throttling.
IBM High IOPS Adapter Hardware Installation Guide for ioMemory VSL 3.2.2
[no notes on this page]
must
receive additional power via the included power cable.
Power Cables for Second Generation IBM High IOPS Duo
fio-status
: If your BIOS has a High Performance/Power Mode, enable it when
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IBM Adapters
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