Qsan XCubeSAN XS5224D Hardware Owner's Manual page 122

The following content and image are detail steps of removing the flash module.
 Press the attention button of flash module until the flash module status LED is blinking.
After blinking for a while, the LED will light off. At this point, you can safely remove the
flash module.
Figure 6-23
 Press the release button of flash module and pull it out until it is free from system
chassis.
Install the substitute flash module. The detailed steps of installing the flash module,

please refer to the chapter 3.5,
 Install the dummy cache-to-flash cage and then use a Phillips screw driver to tighten it.
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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
chapter 5.2.4, Cache-to-Flash Module LEDs and Button
Pressing Attention Button of the Flash Module
Installing the Optional Cache-to-Flash Modules
section and the
section.
section.