Seagate Nytro 3550 6.4TB 12Gb/s SAS 2.5-inch Mixed-Use Enterprise Solid State Drive
By: Seagate

Starting from
$1,325
Indicative. Final pricing is confirmed with your quote.
In Stockships worldwide
Key specs
- Capacity
- 6.4TB
- Interface Standard
- 12Gb/s SAS
- Form Factor
- SFF
- Endurance
- 3 DWPD (mixed use)
- NAND Type
- 3D eTLC
- Condition:
- New (authorized channel)
- Warranty:
- Full manufacturer warranty
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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
The 6.4TB is the largest capacity in Seagate's Nytro 3550 range, which spans 1.6TB to 6.4TB across 3 capacity points. Mixed-use 12G SAS flash for transactional and write-amplified workloads.
It attaches over 12Gb/s SAS in the 2.5" SFF form factor. and is dual-ported, so both controllers in a redundant pair keep a path to the drive. Rated throughput is up to 2,200 MB/s sequential read and up to 2,100 MB/s sequential write.
At 3 DWPD this is a write-endurance part: logging, journals, checkpoint targets and transactional databases rather than bulk read-mostly capacity. That endurance rating works out to roughly 35 PB written over a five-year term, so it is worth checking against your measured write rate before you standardise on it. Media is 3D eTLC.
Specifications
General
- Product Line
- Nytro
- Product Series
- 3550
- Product Type
- Solid State Drive
- Drive Type
- Internal
Technical specifications
- Capacity
- 6.4TB
- NAND Type
- 3D eTLC
- Endurance
- 3 DWPD (mixed use)
- Sequential Read
- Up to 2,200 MB/s
- Sequential Write
- Up to 2,100 MB/s
Interfaces & connectivity
- Drive Interface
- SAS
- Interface Standard
- 12Gb/s SAS
- Port Configuration
- Dual port
Physical
- Drive Width
- 2.5"
- Form Factor
- SFF
Compatibility & compliance
- Compliance Standards
- RoHS, WEEE
Full published specifications for the Seagate Nytro 3550 6.4TB 12Gb/s SAS 2.5-inch Mixed-Use Enterprise Solid State Drive, as supplied. Confirm your backplane presents 12Gb/s SAS and that the platform supports SAS before ordering: compatibility validation against your specific server model is part of every order.
Where the Nytro 3550 6.4TB is deployed
- Write-heavy tiers: logging, journals and checkpoint targets
- Capacity expansion into free 2.5" SFF bays
- Like-for-like replacement and spares holding for deployed fleets
- New build-outs standardised on 12Gb/s SAS
Who this part is for
- Engineers replacing a failed member of a live parity group
- Integrators building to a customer storage specification
- Procurement buying drives on a purchase order against a build sheet
Questions buyers ask about this part
Will the 6.4TB Nytro 3550 fit my server?
This is a 2.5" SFF part on 12Gb/s SAS. It fits any bay wired for 12Gb/s SAS with dual-port SAS routing. Send us your server model and we will confirm backplane support, firmware level and any bracket or caddy required before you order. That check is part of every order we ship.
What is the endurance rating on the 6.4TB?
3 DWPD (mixed use). Across 6.4TB of capacity that is approximately 35 PB of total writes over a five-year term, calculated from the drive-writes-per-day rating. Compare that against your workload's measured daily write volume: if you are writing more than 19TB a day to a single drive, ask us about the mixed-use alternatives instead.
Should I take the 6.4TB or the 3.2TB?
They are the same drive line in a different capacity, with the same 12Gb/s SAS, 2.5" SFF and endurance rating. The 3.2TB gives you less capacity per bay at a lower unit cost. Where bays are the constraint (a full backplane, or a rack you cannot grow), the larger capacity is usually cheaper per usable terabyte once you count the chassis it saves. Ask us for both on one quote and compare.
How fast is the 6.4TB Nytro 3550?
Up to 2,200 MB/s sequential read and up to 2,100 MB/s sequential write, which is what 12Gb/s SAS allows. Sustained figures under a real mixed workload land lower than the sequential headline. Tell us your access pattern and queue depth and we will tell you what to expect rather than quoting the datasheet at you.
Is this Seagate part genuine, and is the warranty intact?
Yes. We supply through authorized distribution only, so the part carries the full Seagate manufacturer warranty and its firmware update path stays supported. No grey-market stock, no re-labelled drives, no voided warranties.
Do you offer volume pricing and accept purchase orders?
The listed price is per unit and indicative; tiered pricing applies at quantity. We accept purchase orders from qualified businesses, government and defence agencies, and educational institutions, with net terms and consolidated invoicing available. Email the quantity you need and we will come back within 48 business hours.
Other capacities in the Seagate Nytro 3550 range
| Model | Part number | Availability | From |
|---|---|---|---|
| Seagate Nytro 3550 1.6TB 12Gb/s SAS 2.5-inch Mixed-Use Enterprise Solid State Drive | N/A | In Stock | $330 |
| Seagate Nytro 3550 3.2TB 12Gb/s SAS 2.5-inch Mixed-Use Enterprise Solid State Drive | N/A | In Stock | $665 |
Compare other Enterprise SSD we stock
| Model | Brand | Key spec | Availability | From |
|---|---|---|---|---|
| Samsung PM893 480GB SATA 6Gb/s 2.5-inch Enterprise Solid State Drive | Samsung | Capacity: 480GB | In Stock | $100 |
| Micron 7450 PRO 960GB PCIe 4.0 x4 NVMe U.3 2.5-inch Enterprise Solid State Drive | Micron | Capacity: 960GB | In Stock | $200 |
| Kioxia CD8-R 1.92TB PCIe 4.0 x4 NVMe U.3 2.5-inch Data Center Solid State Drive | Kioxia | Capacity: 1.92TB | In Stock | $345 |
| Solidigm D5-P5430 1.92TB PCIe 4.0 x4 NVMe U.2 2.5-inch Data Center Solid State Drive | Solidigm | Capacity: 1.92TB | In Stock | $305 |
| Intel D3-S4510 480GB SATA 6Gb/s 2.5-inch Enterprise Solid State Drive | Intel | Capacity: 480GB | In Stock | $90 |
| Toshiba PX05SRB 960GB 12Gb/s SAS 2.5-inch Enterprise Solid State Drive | Toshiba | Capacity: 960GB | In Stock | $155 |
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