I plan to build a server for a small office whith 2 SSD disk in RAID1 volume.
Can I buy a modern motherboard with two M.2 connectors on board and run esxi with RAID1 volume?
Or buy cheap RAID controller with M2 NVME connectors, supported by ESXI?
Please advise inexpensive SSD RAID1 configuration.
I think you would be fine using the SATA bus for just a RAID 1 of 2 SSD drives. That should give you plenty of throughput (6 Gb/s) for a small environment without having to worry about NVMe compatibility. Just my 2 cents.