Pulled the trigger on a new NAS and wondering what RAID setup I'll be using. Right now I've got a QNAP TS-231P3 with 2 disks in RAID 1 and 2 drives on the side unused in case of failure. My new system will be a 4-bay system and now I'm wondering how I'll set up the drives.
I'm thinking of using 3 drives with 1 on the side for swap in case of failure with a RAID 5, however, RAID 6 could also be an option where 2 drives can fail. RAID 10 is an other option but don't think it's more secure than RAID 6 though.
I'm going to be using 2TB Samsung datacenter SSD's (because of endurance) and a 10Gbe NIC, so speed is not that much of an issue for a RAID setup.
Would you suggest RAID 5 with 3 drives and an unused spare on the side to swap in case of failure or just going for a RAID 6 setup and use all drives?