Note:

1. For better system compatibility & performance, please format your HDD/SSD to Ext4 file system!
2. Only one hard drive can be recognized if you already select RAID0/RAID1 mode. Please exit the RAID mode and enter the PM mode(clear raid mode) to test again. (Why only one hard drive can be recognized?)
3. NASPi-Gemini 2.5 is a hardware RAID. It supports RAID at the hardware level and does not require any software configuration. There is nothing to do with software, even if OMV does not support RAID settings.
4. Support Max 16mm thickness 2.5" SATA HDD/SSD installation.
5. Support Max 7mm thickness heatsinks on Raspberry Pi 4 as we use 11mm height spacers for the fan with bracket installation on Pi4.
6. Insert the SD card into Raspberry Pi 4 first before NASPi Gemini installation start.
7. The Raspberry Pi 4 board, 2.5" SATA SSDs/HDDs, power adapter are all not included in the packing list.

Installation Video: youtu.be/telXhhnfzfA (Software Guide of script installation, please fast forward video to 5 minutes 10 seconds.)

Overview:

Geekworm NASPi Gemini is an ultra-compact dual 2.5 inch SATA HDD/SSD NAS storage kit with safe shutdown, auto power on and RAID function that specially designed for Raspberry Pi 4 Model B computer, it allows two pcs 2.5" HDD/SSD to working at the same time with your Raspberry Pi 4. Also support use with one single 2.5" SATA HDD/SSD. The SuperSpeed USB 3.0 port delivers a blistering data transfer rate of up to 5Gbps, letting you transfer a large amount of data in seconds.

NASPi Gemini is composed of three parts: X882 dual 2.5" SATA HDD shield, NASPi Gemini metal case and heat dissipation system(3Pin 4010 PWM fan with metal bracket). To get better heat dissipation of NASPi Gemini, it also support install Max 7mm thickness heatsink above Pi4, as we use the M2.5*11+6mm spacers to fix the PWM fan with bracket.There is space for extra heatsink installation on Pi4.

Features:

• Model: NASPi Gemini 2.5
• Ultra-compact NAS storage solution for Raspberry Pi 4 with Dual 2.5" SATA HDD/SSD
• For use with Raspberry Pi 4 Model B only
• Supports Dual Max 16mm thickness 2.5 SATA HDDs/SSDs working at the same time
• Support Auto Power On function by jumper setting (Automatically turn on when there is a power supply)
• Support Software & Hardware safe shutdown function(Integrated on X882 shield, do not need extra expansion board)
• Support connecting 3pin PWM fan for cooling
• Support Three RAID Modes by jumper setting
• UASP supported only, do not support TRIM
• Allows booting OS from your HDD/SSD for faster app opens, web serving and file copying
• Compatible with all Raspberry Pi operating systems (If the OS (such as Home Assistant) does not allow the installation of external scripts, then the software safe shutdown and automatic adjust fan speed functions are not supported;)

Note about SSD:

• Do not recommend using Samsung hard drives, please use hard drives of other brands.
• As with all SSDs, new SSD/HDD must be formatted before use.
• 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.

How to Power NASPi Gemini

• Via DC5521 Jack of X882 V2.0, 6-18Vdc +/-5% , =4A (DC5525 Jack is compatible with DC5521, also support 5V PSU with DC5525 Jack) Recommend!!!

Warning about power supply:

1. Don't use that adjustable voltage power supply.
2. Don't use the same power supply used on LED strips.

The above two are absolute garbage power supply, can not be used!!!

3. Please use high quality power adapter, or the dual HDD/SSD may cannot be recognized. Since NASPi Gemini can install two pcs 2.5 inch hard drives, it needs a high-quality power supply to provide enough current.

RAID Setting

Please read Raid Instruction on WiKi firstly. You can freely choose the four RAID modes supported by NASPi Gemini by setting the jumper cap.

Warning : Please backup your data before setup and switch, otherwise you maybe lost your data.

1. Inert HDDs to X882 shield and fix it.

2. Please connect the X882 to your PC or Raspberry Pi board and keep power on.

3. Switch RAID mode

Set the switch button to your preferred RAID mode(PM/RAID 0/RAID 1/SPAN) as per the RAID illustration table.

Press the SET button for about 5 seconds, and release it till the blue LED indicators starts flashing.

After RAID mode changed, please confirm that the PC can recognize the disk(s) properly and shows the right capacity.

or you can run the fdisk -l command to view the hard drive on raspberry pi OS when you connect x880 to raspberry pi board:

fdisk -l

You can find two hard drives if you select 'clear raid mode'(this is PM mode)

or

You found only one hard drive if you select the RAID0/RAID1 mode!!!

4. Set CLEAR RAID mode (PM, factory default setup)

Press the SET button for about 5 seconds then and release it till blue LED indicators starts flashing.

After above processes, the setup for CLEAR RAID is done.

[NOTE] Once you set the RAID mode successfully, you need to partition&format&mount the hdd/ssd, so that it can be recognized by your Raspberry Pi OS. please refer to How to View/Partition/Format/Mount HDD/SSD on WiKi.