Will a NVMePCIe gen3 x4 (physical x16) Adapter use x8 of PCIe gen2?

I’ve found a couple of x16 nvme adapters like those: https://www.amazon.de/dp/B07VV9DYTL/ref=sr_1_2_sspa https://www.amazon.de/dp/B07RWCGP1S/ref=sr_1_8 So as a follow up to my earlier question PCIe gen3 x4 card in PCIe gen2 x8 slot – full performance possible?: If a gen3 card that has physical x16 but only uses x4 (gen3) is put into a gen2 slot, would it…

In CentOS 7, is there a way to specify which block devices should be tuned with the scheduler (or ELEVATOR)?

In CentOS 6, there was /etc/tune-profiles/my-server/ktune.sysconfig with this text(I’m referring to the comments that explain what the code is doing): # This is the I/O scheduler ktune will use. This will *not* override anything # explicitly set on the kernel command line, nor will it change the scheduler # for any block device that is…