HAS5310-20T: Synology 20TB 7200RPM SAS 3.5-Inch Hard Drive
MPN: HAS5310-20T|By: Synology

Starting from
$1,750
Indicative. Final pricing is confirmed with your quote.
In Stockships worldwide
- Condition:
- New (authorized channel)
- Warranty:
- Full manufacturer warranty
Prefer your own inbox? Email us about this part
Bulk order? Request volume pricing
Authorized & warrantied
Sourced through authorized distribution, with the full manufacturer warranty.
Compatibility checked
Validated against your server platform before dispatch.
Delivery & lead time
Confirmed with your quote, including expedited freight where available.
Business & public sector
POs, net terms and volume pricing for qualified organizations, government and edu.
Product overview
Synology lists HAS5310-20T as a 20TB 7200RPM SAS 3.5-Inch hard Drive. Vendor-keyed firmware is the usual reason a mechanically identical drive is rejected by the controller, and a 20TB spare is not worth discovering that on. We check the firmware family against your controller before the drive ships.
If the part is wrong for your platform we will say so and suggest the one that is, which is cheaper for both of us than a return.
Specifications
General
- Manufacturer part number
- HAS5310-20T
- Product Type
- Server Hard Drives
- Manufacturer
- Synology
Technical specifications
- Capacity
- 20TB
- Rotational Speed
- 7200RPM
Interfaces & connectivity
- Drive Interface
- SAS
Physical
- Form Factor
- 3.5-Inch
These are the 6 facts we can state about HAS5310-20T without inferring anything. Compatibility beyond this is confirmed per platform, on request, before you order.
Where the Synology HAS5310-20T is deployed
- Like-for-like replacement of HAS5310-20T in an existing system
- Growing bulk capacity in an existing disk shelf
- Rebuilding a parity group after a drive failure
Who this part is for
- Backup and archive teams growing bulk capacity in an existing shelf
- IT teams swapping a failed drive in a live parity group
- MSPs holding cold spares across a fleet of identical chassis
What you get ordering this from us
Ordered by part number
HAS5310-20T is what is quoted and HAS5310-20T is what ships; where an alternate code is genuinely the same part we name it rather than swap it silently.
Firmware family matched
A mechanically identical drive with the wrong firmware is rejected by the controller; we check the family, not just the capacity.
Answered by a human
A quote comes back with the reasoning attached, including the cases where we think you should buy something else.
Questions buyers ask about this part
Is HAS5310-20T genuine and is the warranty intact?
Yes, new and sealed, with the Synology warranty and the firmware update path intact. We do not sell refurbished stock as new, and we do not source grey-market units.
Will HAS5310-20T work in my server?
Send the server model or the shelf it is going into. Vendor-keyed firmware is the usual reason an identical-looking drive is rejected, so we check that alongside interface and form factor.
Do you accept purchase orders and quote at volume?
Yes, POs from qualified organisations, net terms on approval, and banded pricing once the quantity is worth banding. Send the number and we will price it properly.
Compare other Server Hard Drives we stock
| Model | Brand | Key spec | Availability | From |
|---|---|---|---|---|
| Seagate Exos X18 12TB 7200RPM SAS 12Gb/s 512e 3.5-inch Enterprise Hard Drive | Seagate | Capacity: 12TB | In Stock | $280 |
| WD Ultrastar DC HC550 16TB 7200RPM SATA 6Gb/s 512e 3.5-inch Data Center Hard Drive | Western Digital | Capacity: 16TB | In Stock | $345 |
| Toshiba MG09 16TB 7200RPM SATA 6Gb/s 512e 3.5-inch Enterprise Hard Drive | Toshiba | Capacity: 16TB | In Stock | $335 |
| Hitachi HGST Ultrastar He10 8TB 7200 RPM 12Gb/s SAS 512e 3.5"-inch Enterprise Hard Drive | Hitachi | Capacity: 8TB | In Stock | $190 |
| Dell 4TB 7200RPM 12Gb/s SAS 512e 3.5-inch Hot-Plug Nearline PowerEdge Hard Drive | Dell Technologies | Capacity: 4TB | In Stock | $155 |
| HPE 4TB 7200RPM 12Gb/s SAS 512e 3.5-inch LFF Smart Carrier Midline ProLiant Hard Drive | HPE | Capacity: 4TB | In Stock | $155 |
Browse all Server Hard Drives or everything we stock from Synology.
Specifying a system, not just the part?
Bulk capacity usually sits behind the flash tier that feeds a training cluster rather than under it.
