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Silver 3.5 inch bare enterprise hard drive, rectangular metal casing with exposed circuit board on underside

Seagate

Seagate ST3300657SS 300GB 15000 RPM 16MB SAS 6Gb/s 3.5" internal hard drive

SKU CH-BPF9-FP1SZ MPN ST3300657SS

A 300GB 15000 RPM SAS enterprise drive with 16MB cache and 204MB/s sustained data rate

  • Total capacity300 GB
  • Interface typeSAS 6Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Flash memory typeServer
  • Rotational speed15,000 RPM

Capacity 300GB

  • 300GB capacity stores critical server datasets
  • 15000 RPM spindle speed accelerates transaction processing
  • 4ms average seek time reduces data access latency
  • SAS 6Gb/s interface enables high-throughput connectivity
  • 6-million-hours MTBF rating supports continuous enterprise operation

Seagate Cheetah 15K.7 300GB SAS 6Gb/s

This 3.5-inch enterprise hard drive delivers 300GB of storage on a SAS 6Gb/s interface. It spins at 15000 RPM with a 16MB cache to serve high-transaction server workloads. The bare-drive unit uses third-generation perpendicular recording technology. Average latency is rated at 2ms for rapid data access.

Suited for transaction-heavy servers.

The 15000 RPM spindle and 3.4ms average seek time support databases and email servers needing fast random I/O. Sustained data rates reach 204MB/s for sequential workloads. Buyers who need more storage per drive should consider higher-capacity models. Systems without a SAS host bus adapter cannot use this drive.

15000 RPM spindle speed decides fit

The 15000 RPM rotation is the primary factor determining whether this drive matches the performance envelope of the target server. It yields the 3.4ms seek time and 204MB/s sustained throughput listed in the specifications. If the application prioritises cost-per-gigabyte over access speed, a slower spindle drive is more appropriate.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $136.99
Pricier than about 57% of the 4,938 comparable items (median $107.99).
Total capacity 300 GB
Lower than about 88% of the 2,372 comparable items (median 2 TB).
Price per TB $456.63 per TB
Pricier than about 90% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineCheetah 15K.7
Model nameST3300657SS
Total capacity300 GB
Recommended useIdeal for Servers
Performance
Rotational speed15,000 RPM
Average seek time3.4 ms
Mean write time3.9 ms
Mean latency2 ms
Storage
Flash memory typeServer
Cache memory16 MB
Ports & slots
Interface typeSAS 6Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height25.4 mm
Maximum width101.6 mm
Maximum length146.52 mm
Shipping weight0.71 kg
Package size146 × 102 × 25 mm

Other versions of this model

2 more in the same range

Questions about this item

Does the 3.5-inch form factor with 25.40mm height fit my server drive bay?

The drive measures 25.40mm high, 101.60mm wide and 146.52mm long, matching the standard 3.5-inch enterprise bay dimensions.

How do I connect the SAS 6Gb/s interface without damaging the port?

Align the SAS connector with the backplane or HBA port and press firmly until the latch clicks; the interface supports the SAS 2.0 feature set at 6Gb/s.

When should I plan to replace the drive given its 1.6-million-hours MTBF rating?

MTBF of 1.6 million hours is a population statistic, not a service-life guarantee; monitor SMART attributes and replace if reallocated sectors or latency increases appear.

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