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Status: Legacy / discontinued
| Series | x21 Series |
|---|---|
| Bays | 4 |
| CPU | Intel Atom C3538 |
| Cores / Threads | 4 / 4 |
| RAM | 8 |
| CPU architecture | x86_64 |
| Support tier | full |
| Warranty (years) | 3 |
| RAM (max) | 32 |
| Memory slots | 2 |
| Memory generation | DDR4 |
| ECC memory | Non-ECC |
| Network ports | 4x 1GbE |
| USB ports | 3x USB 3.0 |
| Drive bay types | 3.5" SATA HDD, 2.5" SATA HDD, 2.5" SATA SSD |
| Hot-swappable bays | yes |
Documents
Compatible Drives
164 drives certified on DVA3221's official manufacturer compatibility list, sourced directly from Synology's own published Hardware Compatibility List. Each model links to that drive's own compatibility page.
164certified models
6drive brands
24 TBlargest listed
47with verified extra specs
Certified drives by capacity
0.48 TB4
0.96 TB4
1 TB3
1.2 TB1
1.92 TB4
2 TB11
3 TB9
3.84 TB4
4 TB26
6 TB23
8 TB27
10 TB11
12 TB16
14 TB10
16 TB6
18 TB1
20 TB3
24 TB1
Show all 164 certified drives
164 shown
| Brand | Model | Capacity | Type | Verified drive details | Status | Firmware |
|---|---|---|---|---|---|---|
| Synology | HAT5320-24T | 24.0 TB | 3.5" NAS HDD | - | Recommended | 1401 |
| Synology | HAT5310-20T | 20.0 TB | 3.5" NAS HDD | - | Recommended | 1401 |
| Synology | HAT3320-20T | 20.0 TB | 3.5" NAS HDD | - | Recommended | 1401 |
| Synology | HAT5320-20T | 20.0 TB | 3.5" NAS HDD | - | Recommended | 1402 |
| Synology | HAT5310-18T | 18.0 TB | 3.5" NAS HDD | - | Recommended | 1401 |
| Seagate | ST16000VN001 | 16.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | SC60 |
| Synology | HAT5300-16T | 16.0 TB | 3.5" NAS HDD | - | Recommended | 1402 |
| Seagate | ST16000NM001G | 16.0 TB | 3.5" Enterprise HDD | 5-year warranty | Recommended | SN02 |
| Synology | HAT5310-16T | 16.0 TB | 3.5" NAS HDD | - | Recommended | 1403 |
| Seagate | ST16000VE000 | 16.0 TB | 3.5" Surveillance HDD | - | Recommended | EV02 |
| Synology | HAT3310-16T | 16.0 TB | 3.5" NAS HDD | - | Recommended | 1402 |
| Toshiba | MN07ACA14T | 14.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Western Digital | WD140EFFX | 14.0 TB | 3.5" HDD | - | Recommended | 81.00A81 |
| Western Digital | WD140EFGX | 14.0 TB | 3.5" NAS HDD | - | Recommended | 85.00A85 |
| Toshiba | HDWG21EEZSTA | 14.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | 0601 |
| Toshiba | HDWG21EYZSTA | 14.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Seagate | ST14000VE0008 | 14.0 TB | 3.5" Surveillance HDD | - | Recommended | EV02 |
| Toshiba | HDWG21EXZSTA | 14.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Seagate | ST14000VN0008 | 14.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | SC61 |
| Toshiba | HDWG21EUZSVA | 14.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Toshiba | HDWG21EAZSTA | 14.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| HGST | HUH721212ALE604 | 12.0 TB | 3.5" Enterprise HDD | - | Recommended | - |
| HGST | HUH721212ALE600 | 12.0 TB | 3.5" Enterprise HDD | - | Recommended | LEGNT3D0 |
| Seagate | ST12000VN0008 | 12.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | SC60 |
| Seagate | ST12000NM001G | 12.0 TB | 3.5" Enterprise HDD | 5-year warranty | Recommended | SN02 |
| Western Digital | WD120EFBX | 12.0 TB | 3.5" NAS HDD | - | Recommended | 85.00A85 |
| Synology | HAT5300-12T | 12.0 TB | 3.5" NAS HDD | - | Recommended | 1401 |
| Synology | HAT3300-12T | 12.0 TB | 3.5" NAS HDD | - | Recommended | PL01 |
| Toshiba | HDWG21CYZSTA | 12.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Seagate | ST12000VE0008 | 12.0 TB | 3.5" Surveillance HDD | - | Recommended | EV02 |
| Western Digital | WD120EFAX | 12.0 TB | 3.5" HDD | - | Recommended | 81.00A81 |
| Toshiba | HDWG21CAZSTA | 12.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Toshiba | HDWG21CEZSTA | 12.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | 0601 |
| Toshiba | MN07ACA12T | 12.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Synology | HAT3310-12T | 12.0 TB | 3.5" NAS HDD | - | Recommended | 1402 |
| Toshiba | HDWG21CXZSTA | 12.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Toshiba | HDWG21CUZSVA | 12.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Toshiba | HDWG11AAZSTA | 10.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Western Digital | WD101EFAX | 10.0 TB | 3.5" HDD | - | Recommended | 81.00A81 |
| Toshiba | HDWG11AEZSTA | 10.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | 0603 |
| Western Digital | WD101EFBX | 10.0 TB | 3.5" NAS HDD | - | Recommended | 85.00A85 |
| Seagate | ST10000VN000 | 10.0 TB | 3.5" NAS HDD | - | Recommended | SC60 |
| Seagate | ST10000VE0008 | 10.0 TB | 3.5" Surveillance HDD | - | Recommended | EV02 |
| Toshiba | MN06ACA10T | 10.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Toshiba | HDWG11AUZSVA | 10.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | 0603 |
| Toshiba | HDWG11AYZSTA | 10.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Toshiba | HDWG11AXZSTA | 10.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Seagate | ST10000VN0008 | 10.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | SC61 |
| Toshiba | HDWG180YZSTA | 8.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Toshiba | HDWG480YZSTA | 8.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Seagate | ST8000VN0002 | 8.0 TB | 3.5" NAS HDD | - | Recommended, EOL | SC60 |
| Toshiba | HDWG180EZSTA | 8.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Toshiba | MN06ACA800 | 8.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Toshiba | HDWG180AZSTA | 8.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| HGST | HUH721008ALE600 | 8.0 TB | 3.5" Enterprise HDD | - | Recommended | - |
| Synology | HAT3320-8T | 8.0 TB | 3.5" NAS HDD | - | Recommended | 1401 |
| Western Digital | WD80EFZZ | 8.0 TB | 3.5" NAS HDD | - | Recommended | 81.00A81 |
| Toshiba | HDWG180XZSTA | 8.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Toshiba | HDWG180UZSVA | 8.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Toshiba | HDWG480AZSTA | 8.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Synology | HAT3310-8T | 8.0 TB | 3.5" NAS HDD | - | Recommended | 1403 |
| Synology | HAT5310-8T | 8.0 TB | 3.5" NAS HDD | - | Recommended | 1402 |
| Synology | HAT5320-8T | 8.0 TB | 3.5" NAS HDD | - | Recommended | 1401 |
| Seagate | ST8000NM000A | 8.0 TB | 3.5" Enterprise HDD | - | Recommended | SN02 |
| Synology | HAT3300-8T | 8.0 TB | 3.5" NAS HDD | - | Recommended | PL01 |
| Toshiba | HDWG480XZSTA | 8.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Seagate | ST8000VN002 | 8.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | SC60 |
| Western Digital | WD80EFPX | 8.0 TB | 3.5" NAS HDD | - | Recommended | 81.00A81 |
| Seagate | ST8000VN004 | 8.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | SC60 |
| Toshiba | MN08ADA800 | 8.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Toshiba | HDWG480UZSVA | 8.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Synology | HAT5300-8T | 8.0 TB | 3.5" NAS HDD | - | Recommended | 1401 |
| Toshiba | HDWG480EZSTA | 8.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | 0601 |
| Western Digital | WD80EFZX | 8.0 TB | 3.5" NAS HDD | - | Recommended | 81.00A81 |
| Western Digital | WD80EFBX | 8.0 TB | 3.5" NAS HDD | - | Recommended | 85.00A85 |
| Toshiba | HDWG460AZSTA | 6.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Toshiba | HDWG160EZSTA | 6.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Toshiba | HDWG460EZSTA | 6.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | 0601 |
| Toshiba | HDWG460UZSVA | 6.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | 0601 |
| Toshiba | HDWG160UZSVA | 6.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Synology | HAT3300-6T | 6.0 TB | 3.5" NAS HDD | - | Recommended | PL01 |
| Western Digital | WD60EFPX | 6.0 TB | 3.5" NAS HDD | - | Recommended | 81.00A81 |
| Seagate | ST6000VN006 | 6.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | SC60 |
| Toshiba | MN08ADA600 | 6.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Seagate | ST6000VN001 | 6.0 TB | 3.5" NAS HDD | - | Recommended | SC60 |
| Toshiba | MN06ACA600 | 6.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Western Digital | WD60PURX | 6.0 TB | 3.5" Surveillance HDD | - | Recommended | 80.00A80 |
| Toshiba | HDWG460YZSTA | 6.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Seagate | ST6000VX001 | 6.0 TB | 3.5" Surveillance HDD | - | Recommended | CV11 |
| Toshiba | HDWG160AZSTA | 6.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Western Digital | WD60PURZ | 6.0 TB | 3.5" Surveillance HDD | 3-year warranty | Recommended | 80.00A80 |
| Western Digital | WD60EFZX | 6.0 TB | 3.5" NAS HDD | - | Recommended | 81.00A81 |
| Toshiba | HDWG460XZSTA | 6.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Toshiba | HDWG160XZSTA | 6.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Toshiba | HDWG160YZSTA | 6.0 TB | 3.5" NAS HDD | - | Recommended | 0603 |
| Western Digital | WD60EJRX | 6.0 TB | 3.5" Surveillance HDD | - | Recommended | - |
| Western Digital | WD6003FFBX | 6.0 TB | 3.5" NAS HDD | - | Recommended | 83.00A83 |
| Seagate | ST6000NM021A | 6.0 TB | 3.5" Enterprise HDD | - | - | SN01 |
| Toshiba | HDWG440YZSTA | 4.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Western Digital | WD40PURX | 4.0 TB | 3.5" Surveillance HDD | - | Recommended | 80.00A80 |
| Toshiba | HDWQ140UZSVA | 4.0 TB | 3.5" NAS HDD | - | Recommended | - |
| Toshiba | HDWQ140EZSTA | 4.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | - |
| Western Digital | WD40PURZ | 4.0 TB | 3.5" Surveillance HDD | 5400 RPM · 64 MB cache · 3-year warranty | Recommended | - |
| Western Digital | WD4003FFBX | 4.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · 5-year warranty | Recommended | - |
| Synology | HAT3300-4T | 4.0 TB | 3.5" NAS HDD | - | Recommended | PL01 |
| Seagate | ST4000VN008 | 4.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | SC60 |
| Seagate | ST4000NE001 | 4.0 TB | 3.5" NAS HDD | 5-year warranty | Recommended | EN01 |
| Synology | HAT5300-4T | 4.0 TB | 3.5" NAS HDD | - | Recommended | 1403 |
| Toshiba | HDWG440AZSTA | 4.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Toshiba | HDWG440UZSVA | 4.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Western Digital | WD40EFPX | 4.0 TB | 3.5" NAS HDD | - | Recommended | 81.00A81 |
| Seagate | ST4000VN006 | 4.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | SC60 |
| Toshiba | HDWG440EZSTA | 4.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | 0601 |
| Toshiba | MN08ADA400E | 4.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Synology | HAT5320-4T | 4.0 TB | 3.5" NAS HDD | - | Recommended | 1401 |
| Toshiba | MN04ACA400 | 4.0 TB | 3.5" NAS HDD | - | Recommended | FJ1M |
| Seagate | ST4000NM002A | 4.0 TB | 3.5" Enterprise HDD | - | Recommended | SN02 |
| Toshiba | HDWQ140AZSTA | 4.0 TB | 3.5" NAS HDD | - | Recommended | - |
| Toshiba | HDWQ140XZSTA | 4.0 TB | 3.5" NAS HDD | - | Recommended | - |
| Toshiba | HDWG440XZSTA | 4.0 TB | 3.5" NAS HDD | - | Recommended | 0601 |
| Western Digital | WD40EFZX | 4.0 TB | 3.5" NAS HDD | - | Recommended | 81.00B81 |
| Toshiba | MG04ACA400E | 4.0 TB | 3.5" Enterprise HDD | 3-year warranty | Recommended | FP4B |
| Toshiba | HDWQ140YZSTA | 4.0 TB | 3.5" NAS HDD | - | Recommended | - |
| Western Digital | WD40EJRX | 4.0 TB | 3.5" Surveillance HDD | 5400 RPM · 64 MB cache | Recommended | - |
| Synology | SAT5220-3840G | 3.84 TB | 2.5" Enterprise SSD | - | Recommended | SCEMH5.0 |
| Synology | SAT5200-3840G | 3.84 TB | 2.5" Enterprise SSD | - | Recommended | SCEMJ2.1 |
| Synology | SAT5221-3840G | 3.84 TB | 2.5" Enterprise SSD | 5-year warranty | Recommended | SCEM16.3 |
| Synology | SAT5210-3840G | 3.84 TB | 2.5" Enterprise SSD | 5-year warranty | - | SCEMH3.1 |
| Seagate | ST3000VN007 | 3.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | - |
| Western Digital | WD30EFZX | 3.0 TB | 3.5" NAS HDD | 64 MB cache · 3-year warranty | Recommended | 81.00B81 |
| Western Digital | WD30PURZ | 3.0 TB | 3.5" Surveillance HDD | 3-year warranty | Recommended | - |
| Seagate | ST3000VX009 | 3.0 TB | 3.5" Surveillance HDD | 3-year warranty | Recommended | CV11 |
| Western Digital | WD30EFPX | 3.0 TB | 3.5" NAS HDD | 5400 RPM · 64 MB cache · 3-year warranty | Recommended | 81.00A81 |
| Seagate | ST3000VN006 | 3.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | SC60 |
| Western Digital | WD30EJRX | 3.0 TB | 3.5" Surveillance HDD | 5400 RPM · 64 MB cache · 3-year warranty | Recommended | - |
| Western Digital | WD30PURX | 3.0 TB | 3.5" Surveillance HDD | - | Recommended | - |
| Toshiba | MG04ACA300E | 3.0 TB | 3.5" Enterprise HDD | - | Recommended | FP4B |
| Seagate | ST2000VN004 | 2.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | - |
| HGST | HUS722T2TALA604 | 2.0 TB | 3.5" Enterprise HDD | - | Recommended | RAGNWA07 |
| Western Digital | WD20EFZX | 2.0 TB | 3.5" NAS HDD | - | Recommended | 81.00B81 |
| Western Digital | WD20PURZ | 2.0 TB | 3.5" Surveillance HDD | 3-year warranty | Recommended | - |
| Seagate | ST2000VN003 | 2.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | SC60 |
| Western Digital | WD20PURX | 2.0 TB | 3.5" Surveillance HDD | - | Recommended | - |
| Western Digital | WD20EJRX | 2.0 TB | 3.5" Surveillance HDD | - | Recommended | - |
| Toshiba | MG04ACA200E | 2.0 TB | 3.5" Enterprise HDD | 3-year warranty | Recommended | FP4B |
| Synology | HAT3300-2T | 2.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | PL01 |
| Western Digital | WD20EFPX | 2.0 TB | 3.5" NAS HDD | - | Recommended | 81.00A81 |
| Seagate | ST2000NM001A | 2.0 TB | 3.5" Enterprise HDD | - | Recommended | SN02 |
| Synology | SAT5220-1920G | 1.92 TB | 2.5" Enterprise SSD | - | Recommended | SCEMH5.0 |
| Synology | SAT5221-1920G | 1.92 TB | 2.5" Enterprise SSD | 5-year warranty | Recommended | SCEM16.3 |
| Synology | SAT5200-1920G | 1.92 TB | 2.5" Enterprise SSD | - | Recommended | SCEMJ2.1 |
| Synology | SAT5210-1920G | 1.92 TB | 2.5" Enterprise SSD | 5-year warranty | - | SCEMH3.2 |
| Intel | SSDSC2BB012T6 | 1.2 TB | 2.5" Enterprise SSD | - | Recommended, EOL | - |
| HGST | HUS722T1TALA604 | 1.0 TB | 3.5" Enterprise HDD | - | Recommended | - |
| Seagate | ST1000VN008 | 1.0 TB | 3.5" NAS HDD | 3-year warranty | Recommended | SC60 |
| Seagate | ST1000VN002 | 1.0 TB | 3.5" NAS HDD | - | Recommended | - |
| Synology | SAT5200-960G | 0.96 TB | 2.5" Enterprise SSD | - | Recommended | SCEMJ2.1 |
| Synology | SAT5221-960G | 0.96 TB | 2.5" Enterprise SSD | 5-year warranty | Recommended | F3MN902 |
| Synology | SAT5220-960G | 0.96 TB | 2.5" Enterprise SSD | - | Recommended | SCEMH5.0 |
| Synology | SAT5210-960G | 0.96 TB | 2.5" Enterprise SSD | 5-year warranty | - | SCEMH3.2 |
| Synology | SAT5220-480G | 0.48 TB | 2.5" Enterprise SSD | - | Recommended | SCEMH5.0 |
| Synology | SAT5221-480G | 0.48 TB | 2.5" Enterprise SSD | 5-year warranty | Recommended | F3MN902 |
| Synology | SAT5200-480G | 0.48 TB | 2.5" Enterprise SSD | - | Recommended | SCEMJ2.1 |
| Synology | SAT5210-480G | 0.48 TB | 2.5" Enterprise SSD | 5-year warranty | - | SCEMH3.1 |
Extra drive details are published only from manufacturer-owned documents or explicit human review. Follow the model link for field-level sources.
Certified list last checked 2026-08-18.
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