Price per TB is the fastest way to compare SAS hard drives with different capacities, but it should not be the only decision. A larger drive can offer better capacity economics while creating a bigger rebuild unit and concentrating more data in each bay. This page pairs the current SAS listings with a calculator so you can compare the actual offers you are considering.
Use price per TB to shortlist capacities, then choose the size that fits your array layout, redundancy target, controller limits and replacement strategy.
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.
A saving badge appears only when fresh Amazon data supplies a comparable reference price for the same ASIN.
Seagate EXOS X20 18TB SAS 3.5IN 7200RPM 6GB/S 512E/4K
18TB · $38.30/TB
HGST Ultrastar He8 HUH728080AL5200 | 0F23268 | 8TB 7.2K RPM 128MB Cache SAS 12Gb/s 512E 3.5" Helium Platform Enterprise Hard Drive Bare Drive
8TB · $36.18/TB
Dell 4TB HDD SAS 3,5 Inch 7,2K Near Line, 202V7 (Near Line)
4TB · $40.00/TB
Hpe 834031-B21 8TB 7.2K LFF SAS Hard Drive
8TB · $32.75/TB
Seagate Exos X24 16TB Enterprise Internal Hard Drive HDD - 6GB/s SAS 7200RPM 2.5M MTBF (ST16000NM002H)
16TB · $41.56/TB
HGST Ultrastar He6 6TB 3.5" SAS 7200 RPM Enterprise Internal Hard Drive - SAS 64 Mb Cache, 12Gb/s - HUS726060als640 / 0F18370 64 MB Cache 3.5-Inch Internal Bare or OEM Drives 0F18370
6TB · $37.50/TB
Dell M40TH 8TB 7.2K 12G LFF SAS 512E Hard Drive
8TB · $45.00/TB
New Sealed 857965-001 HPE 10TB SAS 12G MIDLINE 7.2K LFF (3.5IN) SC Hard Drive 857644-B21
10TB · $38.85/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
Take the current drive price and divide it by the advertised capacity in terabytes. A $240 12TB drive is $20/TB before shipping, taxes and redundancy.
For a real storage system, calculate the total cost of all drives and divide by usable capacity after mirrors, parity or spares. That number reflects the storage you can actually use.
What should you compare before buying?
| Option | Best fit | Check before buying |
|---|---|---|
| Drive $/TB | Quick capacity value | Best first comparison |
| Usable $/TB | Accounts for RAID/ZFS redundancy | Better array metric |
| Bay efficiency | TB per drive bay | Important in dense chassis |
| Power efficiency | Watts per usable TB | Important at scale |
SAS Price per TB Calculator
Compare two drives using the same currency and condition.
SAS hard drive buying guide
How to calculate SAS HDD price per TB
When a bigger SAS drive is worth it
Higher-capacity drives reduce the number of bays needed for a target raw capacity and can lower the number of controllers, cables and chassis slots required.
The trade-off is that rebuilds involve more data per failed drive and replacement units may cost more. The right capacity depends on operational risk as well as price.
Why this page separates alternatives
Enterprise SATA drives can sometimes offer lower cost or simpler controller requirements. They appear separately so a buyer can compare without confusing SATA products with SAS listings.
If dual-port SAS, a SAS backplane or existing SAS infrastructure is a requirement, a cheaper SATA alternative may not be an equivalent replacement.
Related SAS buying guides
Frequently asked questions
How do I calculate price per TB?
Divide the current drive price by its advertised terabyte capacity.
Should I calculate raw or usable price per TB?
Use both. Raw $/TB helps compare drives, while usable $/TB is better for planning the full array after redundancy.
Do 24TB drives always have the best $/TB?
No. Market inventory and seller pricing can make a smaller capacity the better value at a given moment.
Does SAS have a price premium over SATA?
Sometimes. Compare the same enterprise family, capacity and condition because interface and inventory can affect the gap.
Manufacturer and platform references
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