Today I disassembled my computer to clean it. Tons of dust. Felt great. Reassembled everything and…one of my HDDs isn’t showing up. Checked data and power, all good. So it’s a SATA port thing.

Looked at motherboard manual, looked at the charts/reference guides, thought I understood it, changed a port…the HDD in question is there but now my M.2 SSD isn’t showing up.

Also, I wasn’t expecting to need to be doing minor surgery on my PC so I took some edibles and they are hitting and I’m…I’m just lost. Everything I thought I knew is a lie. Help?

SPECS:

  • MSI x299 Raider motherboard (direct link to manual PDF, start at page 36?)
  • i9-7920x CPU
  • M.2 NVMe SSD in M2_1
  • M.2 SATA SSD in M2_2
  • SATA HDD connected at SATA2
  • SATA HDD connected at SATA4
  • SATA HDD connected at SATA3

This configuration results in M2_2 not appearing. If I move SATA3 to SATA6 one of the HDDs doesn’t appear.

I’ve been mucking with computers over 30 years now, I should have this but I’m so lost.