• Our team is working to address issues posting quotes or media to the forums. Please bear with us as we get this sorted out.

Question M.2 SSD shows up as unknown and not initialized


Jun 21, 2017
I recently bought a second XPG SX6000 Pro I already have for OS, this one is 1TB though. From what I understood from the specification of my motherboard it should work but it doesn't, it shows up in BIOS and in Disk Manager (BIOS sees it as 1TB and Disk Manager doesn't see it's capacity at all), Disk Manager calcifies it as Unknown and Uninitialized, any operation I try to perform on it from Device Manager gives the "A device which does not exist was specified." error. I also tried diskpart, it listed it as a 0B drive, I cleaned it and than diskpart no longer saw it. It came back after a restart. What am I doing wrong?

OS: Windows 10 Pro 64 bit
CPU: Ryzen 7 2700X
Motherboard: Asus PRIME X470-PRO
SSD: SX6000 Pro 512GB M.2
SSD: SX6000 Pro 1TB M.2 <- this is the new drive
HDD: 1TB Western Digital Caviar Blue 3.5''
Do you have any of PCIE x1 slots occupied?

The M.2_2 socket shares PCIe clock with PCIe x1_1. When PCIe x1_1 or PCIe x1_3 is occupied, the M.2_2 socket can only support SATA mode.
Check BIOS to see if M.2 slot in question is fully enabled?

(You can try to reverse M.2 drives (or just try to test original in 2nd M.2 slot) and confirm you can boot from the other M.2 slot to confirm the slot is enabled/working; if it is, that really only leaves the drive as the issue.)