The best SAS hard drive is the one that matches your controller, capacity target and workload without forcing an awkward compromise on sector format or bay count. For most buyers, that means comparing Seagate Exos, WD Ultrastar and Toshiba MG SAS models at the same capacity. OEM Dell and HPE drives can be useful where server qualification matters, but they should be compared carefully against standard enterprise drives.
Start with Seagate Exos SAS, WD Ultrastar SAS and Toshiba MG SAS at the same capacity. Choose OEM Dell or HPE SAS drives when server-specific qualification, firmware or support matters more than the lowest price per TB.
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
A good SAS HDD combines a clearly identified enterprise model, the correct capacity, the SAS interface and a form factor that fits the target chassis. The cheapest listing is not automatically the best if the sector format, condition or warranty is unclear.
For most modern capacity builds, 7200 RPM nearline SAS drives are the relevant category. High-RPM 2.5-inch 10K and 15K drives are a different workload and are intentionally excluded from the main capacity listings here.
What should you compare before buying?
| Option | Best fit | Check before buying |
|---|---|---|
| Seagate Exos | High-capacity arrays | Strong current SAS capacity range |
| WD Ultrastar | Data-center storage | Strong high-capacity SAS options |
| Toshiba MG | Capacity flexibility | Broad enterprise SAS range |
| Dell/HPE OEM | Qualified server deployments | Check firmware and caddy requirements |
SAS Drive Fit Finder
Choose the main constraint and get a practical starting point.
Confirm controller, sector format and condition.
SAS hard drive buying guide
What makes a SAS drive a good buy
When OEM SAS drives are worth paying for
Dell and HPE branded drives can simplify support in validated enterprise servers, especially when firmware qualification or vendor support policies matter.
For an independent storage server or homelab, a standard Exos, Ultrastar or Toshiba MG SAS drive may offer better value if the controller and backplane accept it.
How to avoid the wrong SAS listing
Check that the listing is the hard drive itself rather than a tray, caddy, cable or controller. Also confirm that SAS is explicitly stated because many enterprise families are sold in both SAS and SATA versions.
When you compare a specific capacity, keep the results to that exact advertised TB size so a 20TB choice is not confused with an 18TB or 22TB drive.
Related SAS buying guides
Frequently asked questions
What are the main SAS hard drive brands?
Seagate Exos, WD Ultrastar and Toshiba MG are major enterprise-capacity families. Dell and HPE also sell server-qualified SAS drives.
Are OEM SAS drives better?
Not automatically. They can be valuable for server qualification and support, but standard enterprise SAS drives can be better value in compatible systems.
Should I buy 10K or 15K SAS drives?
For high-capacity storage, usually no. Those smaller high-RPM drives serve a different performance niche. This authority focuses on 3.5-inch capacity-oriented enterprise SAS HDDs.
Can I mix SAS brands in one array?
It can work, but matching capacity, sector size, firmware behavior and performance characteristics generally makes planning and replacement easier.
Manufacturer and platform references
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