Benchmarks: CrystalDiskMark
The Qnap TS-251B-2G is the first dual-bay NAS to be tested using our new 8TB Seagate IronWolf hard disks. Performance is solid, with the NAS having no problem saturating the Gigabit interface during the sequential speed tests, while the dual-core Intel Celeron chip delivers mid-table results in the demanding 4K tests.