Is RAID 10 Really the Best Choice? Let’s analyze the alternatives
Often in data centers you need both speed and reliability, especially if you manage large amounts of data or require intensive reading and writing performance.
For example, in the case of a backup of large amounts of data on mechanical disks, for example if we needed 20TB storage it would be preferable to have a RAID 10 configuration with four 10TB disks compared to a RAID 1 configuration with two 10TB disks. 20TB because it would increase both the reading speed and the writing speed by 100%.
Let’s see a comparative table of the various architectures that perhaps can help us make the right choice:
Confronto RAID: SSD NVMe vs. SSD SATA vs. HDD
Analisi delle prestazioni, affidabilità e capacità delle diverse configurazioni RAID.
| Feature | Single SSD NVMe | Single SSD SATA | Single HDD 7200 RPM | RAID 10 (8 SSD SAS) | RAID 10 (8 SSD SATA) | RAID 10 (8 HDD) | RAID 50 | RAID 60 | RAID 0+1 |
|---|---|---|---|---|---|---|---|---|---|
| Interface | PCIe 3.0 x4 | SATA III (6 Gbps) | SAS/SATA | SAS-3 (12 Gbps) | SATA III (6 Gbps) | SAS/SATA | SAS/SATA | SAS/SATA | SAS/SATA |
| Sequential Read Speed | ~3,500 MB/s | ~560 MB/s | ~200 MB/s | ~6,400 MB/s | ~2,240 MB/s | ~800 MB/s | ~5,000 MB/s | ~4,800 MB/s | ~3,000 MB/s |
| Sequential Write Speed | ~3,000 MB/s | ~530 MB/s | ~200 MB/s | ~6,400 MB/s | ~2,120 MB/s | ~800 MB/s | ~5,000 MB/s | ~4,800 MB/s | ~3,000 MB/s |
| Random Read IOPS | ~600,000 | ~100,000 | ~150 | ~400,000 | ~380,000 | ~600 | ~500,000 | ~480,000 | ~350,000 |
| Random Write IOPS | ~550,000 | ~95,000 | ~150 | ~400,000 | ~360,000 | ~600 | ~500,000 | ~480,000 | ~350,000 |
| Fault Tolerance | None | None | None | High | High | High | High (RAID 5) | Very High (RAID 6) | Medium |
| Usable Capacity | 2 TB | 2 TB | 2 TB | 8 TB | 8 TB | 8 TB | ~10 TB | ~12 TB | 50% of total |
| Best Use Case | Gaming, Video Editing | General Use, Servers | Storage, Backup | Enterprise, Databases | Servers & Multi-Threading | Mass Storage | Data Centers, VM Hosting | Critical Data Centers | Servers with High Performance Needs |
