RAID1 setup not using all HDDs

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   This is a newbie question so please bear with me...
I have a Taichi X470 board with the following:
1 480G SATA SSD, with Win10 Pro installed;
1 2T Seagate 5" SATA HDD -- Empty
1 3T WD red 5" SATA HDD  -- Empty

Now I am trying to setup RAID1 on the two 5" HDDs. 
The problem is, after in BIOS I switch the SATA mode from AHCI to RAID, and pressed Ctl-R at reboot into RAID configuration settings -- it gives me an array containing all three HDDs. When I tried to remove the SSD from the array, the system warns me all data on it will be erased, which is not what I want. 

Can someone give me a quick direction on what I should do instead?

Thanks,

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shawshank Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 Dec 2018 Status: Offline Points: 3	Post Options Post Reply Quote shawshank Report Post Thanks(0) Quote Reply Topic: RAID1 setup not using all HDDs Posted: 16 Dec 2018 at 12:12pm
	This is a newbie question so please bear with me... I have a Taichi X470 board with the following: 1 480G SATA SSD, with Win10 Pro installed; 1 2T Seagate 5" SATA HDD -- Empty 1 3T WD red 5" SATA HDD -- Empty Now I am trying to setup RAID1 on the two 5" HDDs. The problem is, after in BIOS I switch the SATA mode from AHCI to RAID, and pressed Ctl-R at reboot into RAID configuration settings -- it gives me an array containing all three HDDs. When I tried to remove the SSD from the array, the system warns me all data on it will be erased, which is not what I want. Can someone give me a quick direction on what I should do instead? Thanks,

gizmic Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 13 Jun 2018 Location: Hong Kong Status: Offline Points: 677	Post Options Post Reply Quote gizmic Report Post Thanks(0) Quote Reply Posted: 17 Dec 2018 at 10:12am
	all 3 cant be in the same array especially when you havent set it up yet. If you are afraid then unplug the windows drive and create the array.