Question Suddenly out of nowhere, M.2 drive inaccessible ?

[Elliah246]

Some might recognize me from my previous threads, I've managed to get the new PC up and running now.
There are two M.2 drives mounted to this new pc.
One Samsung 990 pro 1TB and one of the same with 4TB.

Previously the 4TB drive showed up normally. Now i connected 3 sata drives to the system to transfer data to the new PC.

After booting, the 4TB drive was gone. I shutdown the PC, unplugged all 3 SATA drives, rebooted but the 4TB M.2 drive still doesn't show up anymore.
I checked the manual page 13 "connectors with shared bandwidth" but there is no mention of SATA drives disabling an M.2 slot.

So what now?

 

[USAFRet]

Need Full parts list.
All devices, make/model.

 

[Elliah246]

Need Full parts list.
All devices, make/model.

GPU AMD Radeon RX 9070 Sapphire Pure 16GB GDDR6 DP 2.1a UHBR13.5
Monitor ASUS ROG Strix OLED XG27AQDMG
CPU AMD Ryzen 7 9800X3D 8C/16T
Mainboard ASUS ROG Strix B850-E
PSU be quiet! Straight Power 12 850W
Ram Corsair Vengeance 32GB DDR5 6000MT CL28
Storage Samsung SSD 990 PRO 4TB M.2
Storage Samsung SSD 990 PRO 1TB M.2
Case Antec Flux Pro
CPU Cooler Arctic Liquid Freezer III 360

The sata drives i connected are from samsung 870 evo and so on.

 

[SkyNetRising]

Mainboard ASUS ROG Strix B850-E

Motherboard has 5x M.2 slots.
Specify, which M.2 slots are being used.

Note - M.2_2 and M.2_3 slots switch PCIEx16 (G5) slot into x8 operation mode. Probably shouldn't use those slots.
M.2_4 slot gets disabled, if second PCIEx16(G4) slot is being used.

If you installed 4TB M.2 drive into M.2_4 slot and installed some PCIE card into 2nd PCIEx16 slot(G4),
this would explain why M.2 drive has disappeared from system.

 

[Elliah246]

Motherboard has 5x M.2 slots.
Specify, which M.2 slots are being used.

Note - M.2_2 and M.2_3 slots switch PCIEx16 (G5) slot into x8 operation mode. Probably shouldn't use those slots.
M.2_4 slot gets disabled, if second PCIEx16(G4) slot is being used.

If you installed 4TB M.2 drive into M.2_4 slot and installed some PCIE card into 2nd PCIEx16 slot(G4),
this would explain, why M.2 drive has disappeared from system.

The M.2 slots whom aren't sharing bandwith are the ones populated.
M.2_1 and M.2_5
I have the GPU mounted into PCIEX16(G5), and forgot to mention in the parts list, a sound card is mounted to PCIEX16(G4).
Still i don't understand why the 4TB drive doesn't show up anymore.

Edit:
The 4TB M.2 drive shows up in bios, and with libre hardware monitor i can read out the temps.
It is being detected, so how come i can't access it?

 

[SkyNetRising]

The 4TB M.2 drive shows up in bios, and with libre hardware monitor i can read out the temps.
It is being detected, how come i can't access it?

Can you show screenshots from ?

Disk Management,​

Device Manager - disk drives and storage controllers sections expanded and​

Windows Storage Spaces (Control Panel\Storage Spaces)​

​

(upload to imgur.com and post link)

 

[cruisetung]

It's possible Windows did not assign a drive letter.

Use disk management to take a look. Assign a drive letter if necessary.

 

[Elliah246]

Can you show screenshots from ?

Disk Management,​

Device Manager - disk drives and storage controllers sections expanded and​

Windows Storage Spaces (Control Panel\Storage Spaces)​

​

(upload to imgur.com and post link)

Oh man! You did it... i ran diskmgmt.msc and a promp came up saying i need to initialize a drive.
It's the 4TB drive. I can now create a new volume but there are various options.
simple, spanned, stripped, mirrored, i'm asuming to go with simple?
And what i don't get, the drive showed up in file explorer before, how come it was gone out of nowhere if it was shown before?
Anyways, i owe you a thank you!