Best HDD for Synology DS918+. I want to know which brand of HDD is the best for Synology 918+. Also, what RPM? Because I read that 7200RPM make sound, and it runs out quickly. Also, Seagate 10 TB have problem with the Caches?
It depends what you are using this NAS for. Simple file server or Multimedia would require nothing more then regular NAS drives like WD Red and Seagate Ironwolf. If there will be 20 or more users using it, you may consider getting faster drives like WD Red Pro or Ironwolf Pro or even Exos drives. You may also consider NVMe cache in this case. If you do plan on runing web server or virtual machines then SSD cache or even 2.5inch SATA SSD would be recommended instead of regular HDDs. Cache what you find built inside the drives themselves do not play a significant role since RAID does not know how to utilise this storage unit.
Best NVMe cache for M.2 slots will be Samsung EVO 960 and 970. For big user base and heavy use EVO Pro or Plus series SSD.
I hope this helps.
Here are the cheapest WD drives
| url | Price/TB | Price | Capacity | MTBF | RPM | read/write | Bells(idle/seek) | Watt | cache |
| Western Digital WD Red WD40EFAX 3.5″ SATA 6Gb/s 4TB 5400rpm [Not recommended – use only for 1&2 bays NAS] | £23.75 | £95 | 4TB | 1M hours MTBF | 5400 | 180/ | 2.3/2.7 | 4.8 | 256 |
| Western Digital WD Red WD40EFRX 3.5″ SATA 6Gb/s 4TB 5400rpm | £25 | £100 | 4TB | 1M hours MTBF | 5400 | 150/ | 2.5/2.8 | 4.5 | 64 |
| Western Digital WD Red WD80EFAX 3.5″ SATA 6Gb/s 8TB 5400rpm | £25.5 | £204 | 8TB | 1M hours MTBF | 5400 | 210/ | 2.7/2.9 | 8.8 | 256 |
| Western Digital WD Red WD140EFFX 3.5″ SATA 6Gb/s 14TB 5400rpm | £27 | £378 | 14TB | 1M hours MTBF | 5400 | 210/ | 2.0/2.9 | 6.5 | 512 |
| Western Digital WD Red WD101EFAX 3.5″ SATA 6Gb/s 10TB 5400rpm | £27 | £270 | 10TB | 1M hours MTBF | 5400 | 210/ | 2.0/2.9 | 5.7 | 256 |
| Western Digital WD Red WD120EFAX 3.5″ SATA 6Gb/s 12TB 5400rpm | £27.83 | £334 | 12TB | 1M hours MTBF | 5400 | 196/ | 2.0/2.9 | 6.3 | 256 |
| Western Digital WD Red WD60EFAX 3.5″ SATA 6Gb/s 6TB 5400rpm[Not recommended – use only for 1&2 bays NAS] | £28 | £168 | 6TB | 1M hours MTBF | 5400 | 180/ | 2.3/2.7 | 4.8 | 256 |
| Western Digital WD Red WD30EFRX 3.5″ SATA 6Gb/s 3TB 5400rpm | £28.33 | £85 | 3TB | 1M hours MTBF | 5400 | 147/ | 2.3/2.7 | 4.1 | 64 |
| Western Digital WD Red WD30EFAX 3.5″ SATA 6Gb/s 3TB 5400rpm [Not recommended – use only for 1&2 bays NAS] | £28.33 | £85 | 3TB | 1M hours MTBF | 5400 | 180/ | 2.3/2.7 | 4.8 | 256 |
| Western Digital WD Red WD100EFAX 3.5″ SATA 6Gb/s 10TB 5400rpm | £28.8 | £288 | 10TB | 1M hours MTBF | 5400 | 210/ | 2.0/2.9 | 5.7 | 256 |
| Western Digital WD Red WD60EFRX 3.5″ SATA 6Gb/s 6TB 5400rpm | £29 | £174 | 6TB | 1M hours MTBF | 5400 | 175/ | 2.5/2.8 | 5.3 | 64 |
| Western Digital WD Red WD80EFZX 3.5″ SATA 6Gb/s 8TB 5400rpm | £29.88 | £239 | 8TB | 1M hours MTBF | 5400 | 175/ | 2.0/2.9 | 6.4 | 128 |
| Western Digital WD Red Pro WD141KFGX 3.5″ SATA 6Gb/s 14TB 7200rpm | £31.79 | £445 | 14TB | 1M hours MTBF | 7200 | 255/ | 2.0/3.6 | 6.2 | 512 |
| Western Digital WD Red Pro WD101KFBX 3.5″ SATA 6Gb/s 10TB 7200rpm | £33.4 | £334 | 10TB | 1M hours MTBF | 7200 | 240/ | 2.0/2.9 | 5.7 | 256 |
| Western Digital WD Red Pro WD8003FFBX 3.5″ SATA 6Gb/s 8TB 7200rpm | £33.88 | £271 | 8TB | 1M hours MTBF | 7200 | 235/ | 2.9/3.6 | 8.8 | 256 |
| Western Digital WD Red Pro WD102KFBX 3.5″ SATA 6Gb/s 10TB 7200rpm | £33.9 | £339 | 10TB | 1M hours MTBF | 7200 | 240/ | 2.0/2.9 | 5.7 | 256 |
| Western Digital WD Red WD20EFRX 3.5″ SATA 6Gb/s 2TB 5400rpm | £34 | £68 | 2TB | 1M hours MTBF | 5400 | 147/ | 2.3/2.4 | 4.1 | 64 |
| Western Digital WD Red Pro WD121KFBX 3.5″ SATA 6Gb/s 12TB 7200rpm | £34.08 | £409 | 12TB | 1M hours MTBF | 7200 | 240/ | 2.0/2.9 | 6 | 256 |
| Western Digital WD Red Pro WD6003FFBX 3.5″ SATA 6Gb/s 6TB 7200rpm | £34.17 | £205 | 6TB | 1M hours MTBF | 7200 | 238/ | 2.9/3.6 | 7.2 | 256 |
| Western Digital WD Red WD20EFAX 3.5″ SATA 6Gb/s 2TB 5400rpm [Not recommended – use only for 1&2 bays NAS] | £35.5 | £71 | 2TB | 1M hours MTBF | 5400 | 180/ | 2.1/2.6 | 4.1 | 256 |
| Western Digital WD Red Pro WD4003FFBX 3.5″ SATA 6Gb/s 4TB 7200rpm | £37.75 | £151 | 4TB | 1M hours MTBF | 7200 | 217/ | 2.9/3.6 | 7.2 | 256 |
| Western Digital WD Red Pro WD2002FFSX 3.5″ SATA 6Gb/s 2TB 7200rpm | £53 | £106 | 2TB | 1M hours MTBF | 7200 | 227/ | 2.9/3.6 | 9.1 | 128 |
| Western Digital WD Red WD10EFRX 3.5″ SATA 6Gb/s 1TB 5400rpm | £54 | £54 | 1TB | 1M hours MTBF | 5400 | 150/ | 2.1/2.2 | 3.3 | 64 |
| Western Digital WD Mobile Red WD7500BFCX 2.5″ SATA 6Gb/s 750GB 5400-7200 | £66.67 | £50 | 750GB | 5400-7200 | 144/ | 2.4/2.5 | 1.4 | 16 | |
| Western Digital WD Mobile Red WD10JFCX 2.5″ SATA 6Gb/s 1TB 5400-7200 | £72 | £72 | 1TB | 5400-7200 | 144/ | 2.4/2.5 | 1.4 | 16 |
Here are the cheapest Seagate drives
| Price/TB | Price | Capacity | MTBF | RPM | read/write | Bells(idle/seek) | Watt | cache | W | |
| Seagate IronWolf (NAS) ST12000VN0008 3.5″ SATA 6Gb/s 12TB 7200rpm | £21.75 | £261 | 12TB | 1M hours MTBF | 7200 | 210/ | 1.8-2.0/2.6-2.8 | 7.8 | 256 | 3yr |
| Seagate IronWolf (NAS) ST4000VN008 3.5″ SATA 6Gb/s 4TB 5900rpm | £22.75 | £91 | 4TB | 1M hours MTBF | 5900 | 180/ | 2.3/2.5 | 4.8 | 64 | 3yr |
| Seagate IronWolf (NAS) ST8000VN004 3.5″ SATA 6Gb/s 8TB 7200rpm | £24.25 | £194 | 8TB | 1M hours MTBF | 7200 | 210/ | 2.8/3.2 | 6.8 | 256 | 3yr |
| Seagate IronWolf (NAS) ST10000VN0008 3.5″ SATA 6Gb/s 10TB 7200rpm | £24.3 | £243 | 10TB | 1M hours MTBF | 7200 | 210/ | 1.8-2.0/2.6-2.8 | 7.8 | 256 | 3yr |
| Seagate IronWolf (NAS) ST8000VN0022 3.5″ SATA 6Gb/s 8TB 7200rpm | £24.5 | £196 | 8TB | 1M hours MTBF | 7200 | 210/ | 2.7/2.8 | 9 | 256 | 3yr |
| Seagate IronWolf (NAS) ST3000VN007 3.5″ SATA 6Gb/s 3TB 5900rpm | £25.67 | £77 | 3TB | 1M hours MTBF | 5900 | 180/ | 2.3/2.5 | 5.6 | 64 | 3yr |
| Seagate IronWolf (NAS) ST6000VN0033 3.5″ SATA 6Gb/s 6TB 7200rpm | £25.83 | £155 | 6TB | 1M hours MTBF | 7200 | 210/ | 2.7/2.8 | 8.8 | 256 | 3yr |
| Seagate IronWolf (NAS) ST16000VN001 3.5″ SATA 6Gb/s 16TB 7200rpm | £25.94 | £415 | 16TB | 1M hours MTBF | 7200 | 210/ | 2.8-3.0/3.2-3.4 | 7.9 | 256 | 3yr |
| Seagate IronWolf (NAS) ST6000VN001 3.5″ SATA 6Gb/s 6TB 5400rpm | £26.17 | £157 | 6TB | 1M hours MTBF | 5400 | 190/ | 2.6/2.7 | 5.3 | 256 | 3yr |
| Seagate IronWolf Pro (NAS) ST16000NE000 3.5″ SATA 6Gb/s 16TB 7200rpm | £26.5 | £424 | 16TB | 1.2M hours MTBF | 7200 | 250/ | 2.8-3.0/3.2-3.4 | 7.6 | 256 | 5yr |
| Seagate IronWolf Pro (NAS) ST12000NE0007 3.5″ SATA 6Gb/s 12TB 7200rpm | £26.75 | £321 | 12TB | 1.2M hours MTBF | 7200 | 250/ | 2.8-3.0/3.2-3.4 | 7.8 | 256 | 5yr |
| Seagate IronWolf (NAS) ST12000VN0007 3.5″ SATA 6Gb/s 12TB 7200rpm | £26.83 | £322 | 12TB | 1M hours MTBF | 7200 | 210/ | 2.8-3.0/3.2-3.4 | 7.8 | 256 | 3yr |
| Seagate IronWolf Pro (NAS) ST8000NE001 3.5″ SATA 6Gb/s 8TB 7200rpm | £26.88 | £215 | 8TB | 1.2M hours MTBF | 7200 | 214/ | 1.8/2.8 | 9.8 | 256 | 5yr |
| Seagate IronWolf (NAS) ST14000VN0008 3.5″ SATA 6Gb/s 14TB 7200rpm | £26.93 | £377 | 14TB | 1M hours MTBF | 7200 | 210/ | 2.8-3.0/3.2-3.4 | 7.9 | 256 | 3yr |
| Seagate IronWolf Pro (NAS) ST12000NE0008 3.5″ SATA 6Gb/s 12TB 7200rpm | £27.58 | £331 | 12TB | 1.2M hours MTBF | 7200 | 250/ | 2.8/3.2 | 7.8 | 256 | 5yr |
| Seagate IronWolf Pro (NAS) ST14000NE0008 3.5″ SATA 6Gb/s 14TB 7200rpm | £27.86 | £390 | 14TB | 1.2M hours MTBF | 7200 | 250/ | 2.8-3.0/3.2-3.4 | 7.6 | 256 | 5yr |
| Seagate IronWolf Pro (NAS) ST10000NE0008 3.5″ SATA 6Gb/s 10TB 7200rpm | £27.9 | £279 | 10TB | 1.2M hours MTBF | 7200 | 214/ | 2.8/3.2 | 7.8 | 256 | 5yr |
| Seagate IronWolf Pro (NAS) ST6000NE000 3.5″ SATA 6Gb/s 6TB 7200rpm | £29.67 | £178 | 6TB | 1.2M hours MTBF | 7200 | 214/ | 2.8-3.0/3.2-3.4 | 8.1 | 256 | 5yr |
| Seagate IronWolf Pro (NAS) ST10000NE0004 3.5″ SATA 6Gb/s 10TB 7200rpm | £30.2 | £302 | 10TB | 1.2M hours MTBF | 7200 | 214/ | 2.8-3.0/3.2-3.4 | 6.8 | 256 | 5yr |
| Seagate IronWolf Pro (NAS) ST8000NE0004 3.5″ SATA 6Gb/s 8TB 7200rpm | £30.63 | £245 | 8TB | 1.2M hours MTBF | 7200 | 214/ | 1.8/2.8 | 7.4 | 256 | 5yr |
| Seagate IronWolf Pro (NAS) ST6000NE0023 3.5″ SATA 6Gb/s 6TB 7200rpm | £32.5 | £195 | 6TB | 1.2M hours MTBF | 7200 | 214/ | 2.8-3.0/3.2-3.4 | 8.1 | 256 | 5yr |
| Seagate IronWolf (NAS) ST2000VN004 3.5″ SATA 6Gb/s 2TB 5900rpm | £33 | £66 | 2TB | 1M hours MTBF | 5900 | 180/ | 1.9/2.1 | 5 | 64 | 3yr |
| Seagate IronWolf Pro (NAS) ST4000NE001 3.5″ SATA 6Gb/s 4TB 7200rpm | £33.25 | £133 | 4TB | 1.2M hours MTBF | 7200 | 214/ | 2.8-3.0/3.2-3.4 | 9 | 128 | 5yr |
| Seagate IronWolf Pro (NAS) ST4000NE0025 3.5″ SATA 6Gb/s 4TB 7200rpm | £36.5 | £146 | 4TB | 1.2M hours MTBF | 7200 | 214/ | 2.8-3.0/3.2-3.4 | 8.5 | 128 | 5yr |
| Seagate IronWolf Pro (NAS) ST2000NE001 3.5″ SATA 6Gb/s 2TB 7200rpm | £37 | £74 | 2TB | 1.2M hours MTBF | 7200 | 195/ | 2.2-2.4/2.6-2.8 | 7.5 | 128 | 5yr |
| Seagate IronWolf Pro (NAS) ST2000NE0025 3.5″ SATA 6Gb/s 2TB 7200rpm | £38.5 | £77 | 2TB | 1.2M hours MTBF | 7200 | 195/ | 2.2-2.4/2.6-2.8 | 7.5 | 128 | 5yr |
| Seagate IronWolf (NAS) ST1000VN002 3.5″ SATA 6Gb/s 1TB 5900rpm | £44 | £44 | 1TB | 1M hours MTBF | 5900 | 180/ | 2.1/2.3 | 3.6 | 64 | 3yr |
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