* Older SSD drives with less efficient flash media may not perform as well as newer drives.
* A microSD card is required for forceing the Raspbian OS to use the HDD/SSD for its "root" partition
===Fan Speed Adjustment===
modify the fan.py file as following. please refer to: [[X-C1_Software]]
[[File:Adjust-fan-fan.png|none|How to adjust the fan speed|700px]]
=== Raid Setting===