When comparing Helios4 vs Udoo x86, the Slant community recommends Helios4 for most people. In the question“What are the best single-board computers for building a NAS system?” Helios4 is ranked 4th while Udoo x86 is ranked 10th. The most important reason people chose Helios4 is:
Has four SATA 3.0 ports so it can handle up to 48TB of storage (12TB on each SATA port).
Specs
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Pros
Pro 4 X SATA 3.0
Has four SATA 3.0 ports so it can handle up to 48TB of storage (12TB on each SATA port).
Pro SATA III (x1)
This board has a SATA III connector to allow the use of a hard drive or SSD (although a hard drive may need external power).
Pro x86
You don't need to use a custom operating system.
Pro Gigabit Ethernet
Pro Up to 8GB RAM
Pro USB3
3 USB 3 ports.
Cons
Con The project fall down
Con No battery or UPS
A PC tailored for NAS usage should have a battery or UPS to prevent data corruption after a power loss. A tiny battery to safely shut it down would be enough.
Con Company shut down business!
See their website-shop.
Con Expensive
After the preorder It is expensive now.