would not nag you, but what would be the easiest and cheapest controller for a RAID1
with "Zero-Maintenance Cache Protection" an 6Gbit/s SATA, which run on PVE 2.0
so far as I know only Adaptec and LSI offers flash based cache protection, but maybe my info is outdated. the Adaptec controllers are working well here, we use many of them in our labs, also a Adaptec RAID 6805 with the cache module.