2 x 2 mirrors with nvme m2 but one is PCIE3 (not 4)

tsm37

Dabbler
Joined
Feb 19, 2023
Messages
46
Can someone please shed some light if I will have some performance hit / bottleneck in this setup?

Scenario:
I'm thinking to setup a 2 x 2 mirrors within one pool with four pcie4 nvme m2 drives of the same size. On the hardware level, one of the bubble gum sticks (lol) will be installed via an adapter on a PCIE3 x16 slot, which pulls 4x lanes from the chipset. The other three bubble gum sticks will be installed on native PCIE4 nvme m2 slots on the mobo.

Question: In this 2 x 2 mirror setup, am I going to experience some bottleneck from a read and write perspective because one pcie4 m2 drive is installed on a
"pcie3" x16 slot via an adapter?

Thanks
 

ChrisRJ

Wizard
Joined
Oct 23, 2020
Messages
1,919
Theoretically yes. Practically, it depends on your hardware and workload.
 
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