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Z390 Second M2 Drive operates half speed - 2 lanes

Skyzlmt
Level 7

Added a new M2 SSD  (M2_2) lower slot and it transfers at half the speed of the first/primary.  2 lanes for the new second drive and 4 for the primary.    Ive read many comments regarding how that M2_2 slot shares data with SATA drives and can slow things but its not clear to me how I disable that shared SATA potential so I can get max speed on my SSD.   I successfully swapped out of Intel Optitane mode as I dont have raid. Ive disabled SATA drives.  Odd to me that there isnt a more "crisp" set of settings

Maybe my SATA HD is plugged into wrong connector?

Anyone shed some light on how to get M2_2 operating full speed while I also have a mechanical drive?

My drive config

  • C Windows: M2_1 an older Sabrent 2tb drive.  Operates with 4 lanes
  • D Media Storage:  M2_2 brand new Crucial 4tb. Operating with only 2 lanes.  Being new its rated much higher
  • E Bulk Media:  16tb Western Digital Sata drive for bulk media

No RAID anywhere.  I chose to backup my date with an offline service.

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