SAS hard drives remain useful where servers and storage shelves need enterprise error handling, dual-port connectivity and predictable 24/7 operation. The key is not simply finding a large drive. You need a 3.5-inch enterprise SAS HDD that matches your controller, sector format, bay and workload. This page puts current SAS listings first, then shows SATA alternatives and the HBA/cabling hardware often required to use SAS drives correctly.
For a new SAS build, start with 12Gb/s 3.5-inch enterprise HDDs from Seagate Exos, WD Ultrastar or Toshiba MG. Buy the capacity that gives the best price per usable TB for your array, then confirm your HBA and backplane support the drive.
See compatible products ↓Current SAS Hard Drives on Amazon 8
Compare 3.5-inch enterprise SAS hard drives that match the capacity and interface on this page. SATA drives, SSDs, trays and accessories are kept separate so you can focus on compatible SAS HDDs.
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Seagate Exos 7E8 ST4000NM005A 4 TB Hard Drive - Internal - SAS (12Gb/s SAS)
4TB · $58.75/TB
HGST HGST Ultrastar 7K4000 4 TB 3.5" 7200 RPM SAS Internal Enterprise Hard Drive 64 MB cache 12Gb/s - HUS724040ALS640 / 0B26885 64 MB Cache 3.5-Inch Internal Bare or OEM Drives 0B26885
4TB · $41.23/TB
Dell 4TB HDD SAS 3,5 Inch 7,2K Near Line, 202V7 (Near Line)
4TB · $40.00/TB
Hpe 846523-004 4TB 7.2K 12G MIDLINE LFF SAS SC Hard Drive
4TB · $53.00/TB
Seagate Exos 7E8 ST6000NM029A 6 TB Hard Drive - Internal - SAS (12Gb/s SAS) - 7200rpm - 512e Format - 5 Year Warranty
6TB · $53.00/TB
HGST Ultrastar 7K6000 4TB 7200 RPM 512e SAS 12Gb/s 128MB Cache 3.5-Inch Enterprise Internal Hard Disk Drive - HUS726040AL5210 (0F22795)
4TB · $44.75/TB
Dell M40TH 8TB 7.2K 12G LFF SAS 512E Hard Drive
8TB · $45.00/TB
Hpe 834031-B21 8TB 7.2K LFF SAS Hard Drive
8TB · $32.75/TB
Enterprise SATA Alternatives 8
These are enterprise SATA HDDs, shown separately so a lower-cost SATA listing is never mistaken for a SAS drive. They can make sense when your server does not require SAS features.
Seagate Exos 7E10 ST4000NM000B - Hard Drive - 4 TB - SATA 6Gb/s | 2 Million Hour MTBF, 550TB Workload Rate, Data Centers, RAID Systems, Cloud Storage
4TB · $69.52/TB
HGST Ultrastar He6 6TB 3.5" SATA 7200 RPM Enterprise Internal Hard Drive with 64Mb Cache - HUS726060ALA640/ 0F18335 64 MB Cache 3.5-Inch Internal Bare or OEM Drives 0F18335
6TB · $22.50/TB
![Toshiba MG09ACA18TE 18 TB Hard Drive - 3.5 Internal - SATA [SATA/600]](https://m.media-amazon.com/images/I/41LMzYKRp7L._SL160_.jpg)
Toshiba MG09ACA18TE 18 TB Hard Drive - 3.5 Internal - SATA [SATA/600]
18TB · $47.06/TB
Seagate Exos 7E8 6TB Internal Hard Drive Enterprise HDD – CMR 3.5 Inch 512E SATA 6Gb/s 7200 RPM 128MB Cache for Enterprise, Data Center – Frustration Free Packaging (ST6000NM021A)
6TB · $54.73/TB
HGST Ultrastar 7K6000 HUS726060ALE610 0F23001 6TB 7200 RPM SATA 3.5" 512E ISE 128MB Cache Enterprise Hard Drive
6TB · $31.67/TB
Toshiba MG09ACA16TE / JP-EC 7,200 RPM, SATA 24x7, RV Sensor, Helium-Filled Hard Drive, 3.5 Inch Enterprise Grade Hard Drive, 16 TB (CMR), Authorized Japanese Dealer, 5 Year Warranty
16TB · $55.88/TB
Seagate Exos 7E8 8TB Enterprise Capacity HDD - 7200 RPM, 256MB Cache, SATA III 6 Gb/s Interface, 3.5" Internal Hard Drive, Crypto Chia Mining - ST8000NM0055
8TB · $46.88/TB
HGST Ultrastar 7K4000 4 TB 3.5" 7200 RPM SATA Internal Enterprise Hard Drive 64 MB Buffer 6.0Gb/s - HUS724040ALA640 / 0F14688 64 MB Cache 3.5-Inch Internal Bare or OEM Drives 0F14688
4TB · $50.00/TB
SAS Hardware You May Also Need 8
A SAS hard drive needs the right host hardware. Compare HBAs and cables only after checking the connector on your controller or backplane.
SAS HBA Card Compatible with LSI 9300-8i IT Mode 9211-8i 9207-8i | PCIe 3.0 x8, 2x 8643 Internal, PCIe SATA Expansion Card, 12Gb/s SAS + SATA 6Gb/s, HBA Controller for ZFS TrueNAS unRAID NAS
SAS infrastructure
SAS HBA Card Compatible with LSI 9300-8i & D3307 IT Mode HBA Controller | SAS3008, PCIe 3.0 x8, 2x SFF-8643 Internal, 12Gb/s SAS + SATA 6Gb/s, PCIe SATA Expansion Card for ZFS TrueNAS unRAID NAS
SAS infrastructure
2-Pack SFF-8643 to 4x SFF-8482 SAS Forward Breakout Cable 0.5m, 12Gbps | Two 0.5m/1.6ft SAS-3 cables with 29+15-pin power connect up to 8 SAS HDDs/SSDs; for LSI 9300-8i and Broadcom 9400-8i
SAS infrastructure
LSI Logic SAS 9300-8e SGL LSI00343
SAS infrastructure
ADCAUDX Mini-SAS to SAS Cable: 0.5M SFF-8087 to SAS SFF-8087 to SFF-8482 | 4X SFF-8482 Connector with SATA Power Adapter Cable (1.6FT)
SAS infrastructure
Sonilco Storage Configurations Cable Mini SAS HDD SFF-8643 to 4 SFF-8482 with 15-pin Power Port Cord (1 Cable, 0.5 Meter / 1.6 Feet)
SAS infrastructure
NGFF Internal Slimline SAS HD SFF-8654 Host Controller to 4 SFF-8482 Target SAS Hard Disk and SATA Power Breakout Fanout Cable (100cm)
SAS infrastructure
CableCreation Mini SAS 26Pin (SFF-8088) Male to 4 SATA 7Pin Female Cable, Mini SAS Host/Controller to 4 SATA Target/Backplane, 1M / 3.3FT
SAS infrastructure
SAS cables are not universal. Confirm the HBA, backplane and connector standard before ordering.
Why this buying advice matters
SAS remains a practical choice for servers, JBOD shelves and storage arrays that already use SAS infrastructure. Enterprise SAS drives add features such as dual-port connectivity, deeper command handling and predictable behavior in larger multi-drive systems.
For a buyer, the most important distinction is interface compatibility. A SAS drive can sit in a SAS-capable backplane, while a motherboard SATA-only port cannot directly operate a SAS drive.
What should you compare before buying?
| Option | Best fit | Check before buying |
|---|---|---|
| Seagate Exos SAS | Dense server and storage arrays | Check exact SAS SKU and sector format |
| WD Ultrastar SAS | Enterprise capacity and multipath environments | Check HC generation and SAS model number |
| Toshiba MG SAS | Broad capacity coverage | Check MG SAS part number and block format |
| Enterprise SATA alternative | Lower controller complexity | No SAS dual-port capability |
SAS Price per TB Calculator
Compare two drives using the same currency and condition.
SAS hard drive buying guide
Why SAS still makes sense for enterprise storage
How to compare capacity without overpaying
Capacity alone does not tell you which drive is the better buy. Divide the current price by the advertised capacity and compare the result at the same condition, warranty and sector format.
Large drives can reduce bay count and power per usable terabyte, but they also increase rebuild exposure and the amount of data concentrated in each device. Match drive size to your redundancy plan.
Why the controller and cable matter
A common SAS build uses a Broadcom or LSI HBA with the correct internal cable or a server backplane. The connector on the HBA determines which breakout cable is appropriate.
Avoid listings that imply a simple SAS-to-SATA plug will make a SAS drive work from a SATA motherboard port. The host still needs a SAS controller.
Related SAS buying guides
Frequently asked questions
Can I plug a SAS hard drive into a SATA motherboard port?
No. A SAS drive needs a SAS-capable controller or backplane. A passive connector change does not add SAS protocol support.
Is 12Gb/s SAS faster than a hard drive can read data?
Usually yes for one spinning HDD. The interface bandwidth is still useful for compatibility, dual-port operation and aggregate workloads across controllers and expanders.
Should I buy SAS or SATA for TrueNAS?
Either can work when the controller and topology are appropriate. SAS is especially useful in enterprise backplanes and larger systems, while SATA can reduce cost and complexity in smaller builds.
What capacity gives the best value?
It changes with market pricing. Compare the current price per TB, warranty, condition and the number of bays your array can support.
Manufacturer and platform references
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