Qsan Technology XCubeSAN XS5224D, Hardware Manual

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5.2.4. Cache-to-Flash Module LEDs and Button
Please refer to the following content for definitions of the LED and button behaviors.
Figure 5-12 Flash Module LEDs and Button
Table 5-12 Descriptions of Flash Module LEDs and Button
Number Description Definition
1 Power LED

Solid Green : Power is good at flash module.

Off: There is no power at flash module.
2 Status LED

Solid Blue : The status of flash module is
good.
 Blinking Blue and Amber Interlaced: Installing
or removing the flash module.

Solid Amber : The flash module is failed or
wrong PCIe connection speed.
3 Attention Button Used to prompt system that the flash module
can be removed later.
CAUTION:
The flash module of Cache-to-Flash is hot swappable because it is a PCIe
device. Before removing the flash module from the system chassis, you
must press the attention button until the flash module status LED finished
blinking. Otherwise, the flash module maybe damage. For more
information about Cache-to-Flash modules, please refer to the chapter
3.5,
Installing the Optional Cache-to-Flash Modules section and the
chapter 6.5, Removing the Cache-to-Flash Modules section.