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The HGST Ultrastar DC SN200 is a real enterprise NVMe SSD family, but its headline figures need context. The 7.68TB U.2 model is rated for up to 3,350MB/s sequential read and 835,000 random-read IOPS. The approximately 6,170MiB/s read speed and 1.2 million random-read IOPS figures apply to a faster HH-HL add-in-card configuration, not automatically to one 7.68TB U.2 drive.
The SN200 remains interesting for older servers, storage arrays, and homelabs that support enterprise U.2 hardware. It is not a current-generation SSD, however, and used units must be checked carefully for compatibility, firmware, wear, and warranty status.
What the Ultrastar DC SN200 is
The Ultrastar DC SN200 was introduced by HGST as a data-center NVMe SSD family and is now documented and supported through Western Digital and SanDisk. It uses PCIe 3.0, NVMe 1.2, and 15nm MLC NAND. Its design priorities were enterprise endurance, predictable performance, power-loss protection, and high-capacity deployment rather than consumer desktop use.
Key enterprise features include PowerSafe power-loss protection, end-to-end data-path protection, advanced ECC, flash-aware RAID, secure erase, and an unrecoverable bit error rate below 1 in 1017. The U.2 version also supports dual-port operation for suitable high-availability server designs.
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![HGST Ultrastar SN200 HUSMR7616BHP301 1.60 TB Solid State Drive - PCI Express [PCI Express 3.0 x8] - Internal - Plug-in Card](https://m.media-amazon.com/images/I/31JvQMI5fnL._SL160_.jpg)
- High Capacity: 1.6 TB solid state drive provides ample storage for demanding applications
- Fast Data Transfer: PCIe 3.0 x8 interface delivers high-speed data transfer speeds
- Reliable Performance: HGST Ultrastar SN200 series offers reliable data protection and endurance
- Compact Design: 2.5 inch form factor is ideal for compact desktop systems
- Easy Installation: Plug-in card design allows for quick and easy installation
The formal product name is Ultrastar DC SN200 NVMe SSD. “SN200 Accelerator” is wording used in the original news coverage and should not be interpreted as a separate accelerator card or software product.
See the current SanDisk product listing.
SN200 specifications at a glance
| Feature | SN200 family |
|---|---|
| Interface | PCIe 3.0 |
| Protocol | NVMe 1.2 |
| NAND | 15nm MLC |
| Form factors | 2.5-inch U.2 and HH-HL add-in card |
| Endurance classes | 1 DWPD and 3 DWPD |
| Maximum listed U.2 capacity | 7.68TB |
| Maximum listed AIC capacity | 6.4TB for the listed endurance configurations |
| Warranty language | Five-year limited warranty for the original product terms |
Available capacity points included approximately 800GB/960GB, 1.6TB/1.92TB, 3.2TB/3.84TB, 6.4TB, and 7.68TB, depending on form factor and endurance tier. The largest 7.68TB models are in the 1-DWPD class, while 3-DWPD versions top out at lower capacities.
DWPD, or drive writes per day, is an endurance-rating convention. A 1-DWPD rating does not mean the SSD suddenly fails after one full drive write every day; actual life depends on workload, write amplification, temperature, firmware, and the drive’s history.
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Why the 7.68TB, 6.1GB/s, and 1.2M-IOPS headline is misleading
The three headline numbers do not describe a single undifferentiated SN200 model.
7.68TB U.2 model
| Specification | 7.68TB U.2 SN200 |
|---|---|
| Form factor | 2.5-inch U.2 |
| Interface | PCIe 3.0 x4 or 2×2 |
| Sequential read | Up to 3,350MB/s |
| Sequential write | Up to 2,100MB/s |
| Random read | Up to 835,000 IOPS |
| Random write | Up to 75,000 IOPS |
| Endurance | 1 DWPD |
The 7.68TB U.2 part is identified in the official part-number documentation as 0TS1357 / HUSMR7676BDP3Y1.
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- 14TB Ultrastar data center high capacity internal hard disk drive
- Sata-to-sata power adapter cable included for legacy system compatibility, power-disable feature enables host power control, power supply cables that have 4 wires do not require an adapter.
- HelioSeal technology is key to achieving higher drive capacities, greater reliability ratings, and extreme power efficiency.
- Up to 58% lower idle W, TB than 8TB Ultrastar air-filled drives, top of the line mean-time-between-failure of 2.5 million hours.
HH-HL add-in-card version
The faster SN200 add-in-card configuration uses PCIe 3.0 x8 and is rated at up to approximately:
- 6,170MiB/s sequential read
- 2,200MiB/s sequential write
- 1.2 million random-read IOPS
- 200,000 random-write IOPS
- 580,000 mixed random read/write IOPS in the listed 70% read and 30% write test
The 7.68TB HH-HL part is identified as 0TS1353 / HUSMR7676BHP3Y1. These peak AIC figures should not be quoted as the performance of the 7.68TB U.2 drive.
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Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →The difference is not merely cosmetic. The AIC has a wider PCIe x8 connection, while the U.2 model uses PCIe x4 or dual x2 connectivity. More lanes provide substantially more host bandwidth, assuming the server, firmware, cooling, and workload can use it.
Read the official SN200 data sheet.
How to interpret the performance ratings
Sequential throughput measures large, orderly transfers and is relevant to activities such as streaming data or moving large files. Random-read IOPS measures many small simultaneous operations and is more relevant to databases, virtualization, metadata-heavy applications, and transactional systems.
The manufacturer’s ratings are maximum or peak values, not guaranteed application performance. Sequential tests use 128KiB operations, while random IOPS tests use 4KiB operations. Results vary with capacity, usable capacity, queue depth, read/write mix, thermal conditions, host CPU, PCIe topology, filesystem, and software stack.
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- 512e SAS interface only works in servers with capable backplanes
- 2.5M MTBF and 0.35% AFR
- 44% lower idle W/TB than 6TB air drives
- Instant Secure Erase for data security and easy drive retirement
A mixed-workload result can be more useful than a sequential-read headline for database or online-transaction-processing deployments. Even then, benchmark results should be matched to the intended queue depths and read/write pattern.
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Workloads the SN200 was built for
The SN200 was intended for enterprise workloads such as:
- SQL and NoSQL databases
- Online transaction processing
- Real-time applications
- Virtualization datastores
- High-density storage arrays
- Read-heavy caching and acceleration
- High-availability systems using dual-port U.2 connectivity
Its MLC NAND, power-loss protection, endurance options, and data-path safeguards distinguish it from ordinary consumer SSDs. An E8 Storage deployment, for example, used 7.68TB SN200 drives in high-capacity storage systems aimed at SQL, NoSQL, and real-time workloads.
That does not make every SN200 appropriate for every enterprise workload. The 1-DWPD versions may be a poor choice for sustained write-heavy applications, and the 3-DWPD models have different capacity limits.
Compatibility: U.2 is not SATA
A 2.5-inch U.2 SSD may look similar to a SATA or SAS drive, but it requires PCIe/NVMe connectivity. A physically compatible drive bay can still be wired only for SATA or SAS and therefore cannot operate an SN200.
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- Industry's leading 8TB capacity in a standard 3.5-inch form factor
- Industry's best Idle and Active power efficiency (Watts/TB)
- Reliable, field-proven, 2nd generation HelioSeal process and 7Stac design
- 2M hours MTBF rating & 5-year limited warranty
- Advanced format 4Kn and 512e models
Before buying, verify:
- Form factor: Confirm whether the listing is for a U.2 drive or an HH-HL add-in card.
- Backplane wiring: A U.2 bay must be wired for PCIe/NVMe, not merely SATA or SAS.
- PCIe lanes: The AIC needs a suitable PCIe slot and enough lanes, ideally x8 for its rated configuration.
- Cabling and power: Check the exact SFF connector, cable, power delivery, and server backplane.
- Dual-port topology: Dual-port capability is useful only when the server, backplane, controllers, and software support it.
- BIOS and platform support: Confirm NVMe boot, hot-plug, PCIe bifurcation, and vendor qualification requirements.
- Cooling: Enterprise NVMe drives can throttle under sustained load. Bare adapters and poorly ventilated bays are risky.
Modern Linux and Windows Server systems generally support NVMe, but operating-system support alone does not guarantee that a particular server will recognize or qualify the drive.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Buying a used SN200 in 2026
SanDisk still hosts product documentation and an SN200 support portal, but that does not establish that new retail stock, ongoing firmware development, or the original warranty is available for every drive sold today. A drive introduced years ago may now be sold as used, refurbished, OEM-surplus, or remaining channel inventory.
Ask for the exact model number rather than buying on the family name alone. OEM-branded drives from Dell, Lenovo, or another system vendor may carry different firmware, qualification, or support terms. Do not assume a generic SN200 firmware package is appropriate for an OEM-specific unit.
Request NVMe health information before purchase. On Linux with nvme-cli installed, these general inspection commands are useful:
sudo nvme list
sudo nvme id-ctrl /dev/nvme0
sudo nvme smart-log /dev/nvme0
sudo nvme id-ns /dev/nvme0n1Check the model and serial number, firmware revision, namespace size, percentage used, data units written, critical warnings, temperature, media errors, unsafe shutdowns, and power-on hours. Do not run destructive namespace-management or format commands on a drive containing data.
Best Value
- MLC NAND Flash for ultra-high performance and endurance
- Best IOPS/Watt for reduced TCO
- Advanced Power-loss Data Management technology
- 6Gb/s SAS interface for maximum throughput
Nominal capacity says nothing about remaining life. A used drive’s condition depends on its actual media wear, previous workload, power-on hours, temperature history, firmware, and storage environment.
The original data sheet cites a projected two-million-hour MTBF, a projected 0.44% annual failure rate, and a five-year limited warranty. MTBF and AFR are statistical vendor estimates, not predictions for an individual drive. A used drive purchased in 2026 may also be outside its warranty period; eligibility can depend on serial number, region, seller, and OEM provenance.
Capacity and temperature details
The advertised 7.68TB is a decimal capacity. The operating system will show a smaller binary-equivalent figure, and usable capacity can be reduced further by overprovisioning, metadata, and reserved flash.
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The displayed U.2 product page lists an operating-temperature range of approximately 0°C to 55°C. Verify the exact rating for the particular part number because configuration and regional product pages can differ.
SN200 versus newer enterprise SSDs
| Drive | Platform | 7.68TB-class headline performance | Best fit |
|---|---|---|---|
| SN200 U.2 | PCIe 3.0, NVMe 1.2, MLC | Up to 3,350MB/s read and 835K random-read IOPS | Existing Gen3 U.2 systems and cost-sensitive used hardware |
| Ultrastar DC SN655 | PCIe Gen4, U.3-oriented, TLC | Up to 6,800MB/s read and 980K random-read IOPS | Newer U.3-compatible servers |
| Ultrastar DC SN861 | PCIe Gen5 U.2 | Up to 13,700MB/s read and 3.3M random-read IOPS | Modern Gen5 platforms requiring maximum performance |
The SN655 is a more modern choice for a compatible Gen4 server, while the SN861 is designed for Gen5 systems and adequate cooling. Neither is a simple value upgrade if the server is limited to PCIe Gen3 or has an older U.2 backplane. Compare platform compatibility, endurance, latency, power, form factor, warranty, and total cost—not just sequential read speed.
When the SN200 still makes sense
Consider an SN200 when you already have an older enterprise server with PCIe Gen3 U.2 bays, need high capacity, value enterprise power-loss protection and MLC NAND, and can verify the drive’s health at a reasonable used-market price. It can also be a practical homelab or virtualization-storage option when used hardware is acceptable.
Avoid it for a new Gen4 or Gen5 deployment seeking maximum performance, a consumer desktop without U.2 support, a SAS-only chassis, or a workload that needs current vendor warranty and lifecycle support. Be especially cautious with an unverified 1-DWPD unit for sustained write-heavy use.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesThe most important buying rule is simple: identify the exact part number, confirm the server’s PCIe wiring and form factor, obtain health and firmware data, and calculate whether a newer SN655 or SN861 offers better value. Reject listings that omit health information, firmware details, return rights, or the exact model.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
