This is a weird one, if there's a better website for this please direct me to it.

Built a new system for myself for Xmas, it's a Ryzen 7 3600X with an Asus ROG Strix B450-F motherboard. The only drive it recognizes is the first M.2 SSD I installed. I've tried different SATA SSDs and SATA HDs but the BIOS does not see any of them. I've switched power cables and SATA cables and even got a separate SATA card, no dice. Finally I got another M.2 drive and it doesn't even see that!

Of course in the OS fdisk sees nothing but the first M.2 I installed:

root@ryzen7 ~]# fdisk -l
Disk /dev/nvme0n1: 953.89 GiB, 1024209543168 bytes, 2000409264 sectors
Disk model: INTEL SSDPEKNW010T8
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x83515916

Device Boot Start End Sectors Size Id Type
/dev/nvme0n1p1 * 2048 2099199 2097152 1G 83 Linux
/dev/nvme0n1p2 2099200 2000408575 1998309376 952.9G 8e Linux LVM

dmesg is similarly unhelpful.

I am really at a loss as to what could be causing this. I've got Fedora 31 running just fine, but I want to dual boot Windoze so I can play things like Skyrim. And I can't add another drive; this is pissing me off.

Please help!

I don't know your specific motherboard, but some boards have M.2 slots that only take SATA SSDs, and/or others that take NVMe. Occasionally, also, using one of the M.2 slots can disable one or more onboard SATA port.

It would be odd for that to be the case on a gamer-spec chassis like a ROG Strix motherboard, but it's worth checking.

Very, very strange that a separate SATA board isn't seen. Perhaps you need to modify the UEFI boot settings to "legacy" for other cards to be picked up, or otherwise add them into and an enable them for the system to see them.

Enable sata ports or change out of fake raid if it has it?

Did you check to see if your Asus has the latest available BIOS installed? I installed one of those ROG Strix B450-F boards for a friend a few weeks ago, but only used his two old SATA disks, never tried any M.2 in it. IIRC its installed BIOS was 2 versions old. I think I remember seeing in the manual that one or two SATA ports are disabled if the M.2 slot farthest from CPU is in use, or if one M.2 slot is in use as SATA instead of NVME.

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also I believe some bios accept M.2 only if installed into a PCI Express slot converter.

most internet searches gave me commercial sites but you might like to see results for ?

m.2 pcie adapter

RocketRay,

Many users are having similar problems with this board. It may be worth contacting ASUS Support for advice.

From the manual on page 9:

AMD Ryzen™ 2nd Generation / Ryzen™ 1st Generation Processors*

- .2_1 socket 3 with M Key, Type 2242/2260/2280 (PCIE 3.0 x 4 and

SATA modes) storage devices support**

- .2_2 socket 3 with M Key, Type 2242/2260/2280/22110 (PCIE 3.0 x 4

mode) storage devices support***

- 2 x SATA 6Gb/s ports

AMD Ryzen™ with Radeon™ Vega Graphics

- .2_1 socket 3 with M Key, Type 2242/2260/2280(PCIE 3.0 x 4 and SATA

modes) storage devices support

- 2 x SATA 6Gb/s ports

AMD® B450 Chipset:

- 4 x SATA 6Gb/s ports

* Support SoreMI and NVMe RAID

** When the M.2_1 Socket 3 is operating in SATA or PCIE mode, SATA6G_5/6

ports will be disabled (see second link below)

*** When the M.2_2 is occupied by M.2 device, PCIe x16_1 will run at x8 mode.

https://www.reddit.com/r/ASUS/commen...rt_m2/etwn19s/

Also:
https://rog.asus.com/forum/showthrea...cognized/page2

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I had some of the problems on a system using an ASUS TUF B450 plus gaming. It was also intermittently failing POST (no beep) The installed bios version was 2006 from 11/2019. I traced the POST failure to the M.2 drive which was working well on instances when POST beeped. Found that a newer bios was released last month (ver 2202) so I updated using motherboards EZ flash 3 in USB mode. This made all of the problems disappear so far. Now I love my motherboard again.

Update: Problem not fixed, Power on self-test still failing intermittently. Verified that problem associated with M.2 drive.

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