Hello!

I am looking at this Asus addon card that holds 4 M.2 SSD drives and can RAID them together, but I have a couple of questions. First off, can Linux actually use it as a raid volume? Can I get two addon cards to effectively use 8 M.2 cards in RAID1? And also, if I use those addon cards, am I still able to use the slot built on the motherboard itself? I was thinking of having a Pro drive for that mobo slot that holds the OS and apps, then using two of the asus addon cards to make 8tb of storage RAIDed (1) together. I would have plenty of PCI slot space to do that.

Kind of an unknown.

To work I'd have to assume or prove the following.

The board(s) will be viewed in bios. This may be a sticking point. In the past I've had some issues with trying such but your motherboard and your card(s) will decide.

From this site I'd think that it will work. https://www.asus.com/us/Motherboard-...D-V2/overview/

There are other pcie ssd cards too.

From Amazon site reviewer said this.

"2.0 out of 5 starsBeware
July 29, 2019
Verified Purchase
Pro: Sturdy hardware. When one NVMe M.2 module is installed you will see the module (in Linux at least)
Con: If you install more than one NVMe M.2 modules you will only see one. Do not expect to plug in 4 modules and configure them as a software raid array.

Software raid (Intel version of NVMe) is only possible with certain Intel CPU's and certain Intel motherboards. In addition you will have to purchase a license (a key that plugs into the motherboard) if you want to have a raid array. I do not know the status of Linux software for this configuration. "

I don't know how accurate that is.