OviOS Linux
StorPool
VMware vSAN
PetaSAN
DataCore SANsymphony
Starwind Virtual SAN
LINBIT VSAN
Datrium
Unraid
TrueNAS Core
OpenMediaVault
XigmaNAS
Amahi
Rockstor
PetaSAN
Open-E Data Storage Software SOHO
OviOS Linux UnraidThis small distro is incredibly fast and effective, we use it for SMB with AD authentication, around 300 clients, and to provide a few large LUNs to ESXi. The performance is way better than commercial products, just set it up and you'll forget it's there
Based on our record, Unraid seems to be more popular. It has been mentiond 13 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Really: I've got a Synology 10-disk unit in JBOD mode (each drive independent, but see SnapRaid) containing backup of backups and recent set of 4x 14TB unopened drives. I'm working at building a new UnRaid system to contain everything; I just need to confirm the power supply max load and if I can stagger the drives to avoid the maximum inrush. RAID5 is great (but Is Not A Backup), UnRaid is a "daily" RAID5... Source: over 1 year ago
As an example, I have qemu+kvm host running my VMs (NAS, plex, Nextcloud etc.). As for NAS OS, TrueNAS is a great options. With different drive size you can consider UnRAID. It allows to pool drives of a different size. https://unraid.net/product. Source: over 1 year ago
You can turn a PC case into a NAS with NAS OS like openmediavault (https://www.openmediavault.org/), unraid (https://unraid.net/product), or TrueNAS Core (https://www.truenas.com/docs/core/gettingstarted/corehardwareguide/). They require +8 GB RAM (Unraid system requirements say 4 and OMV is ok with +1GB RAM). To start, I'd go with openmediavault. If you need it to be windows, say, using for anything else, you can... Source: almost 2 years ago
Take a look at using unraid as a backup server. https://unraid.net/product. Source: almost 2 years ago
In case you are interested in software options. UnRAID is a nice option. Https://unraid.net/product. Source: about 2 years ago
StorPool - StorPool is designed from the ground up to provide cloud builders, shared hosting providers and MSPs with the most resource efficient storage software on the market.
TrueNAS Core - TrueNAS Core (formerly FreeNAS) is a storage operating system strong and robust enough to meet the needs of enterprise level businesses.
VMware vSAN - VMware vSAN is radically simple, enterprise-class software-defined storage powering VMware hyper-converged infrastructure.
OpenMediaVault - OpenMediaVault is the next generation network attached storage (NAS) solution based on Debian Linux.
PetaSAN - PetaSAN is an open source Scale-Out SAN solution offering massive scalability and performance.
XigmaNAS - File Sharing, OS & Utilities, and Security & Privacy