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Silver 3.5 inch bare drive with SAS connector and enterprise label

Seagate

Seagate Cheetah 15K.7 ST3450857SS 450GB 15000 RPM 16MB Cache SAS 6Gb/s 3.5" Internal Hard Drive

SKU CH-5N2P-EZ50M MPN ST3450857SS

A 450 GB enterprise hard drive spinning at 15000 RPM with a SAS interface for server workloads

  • Total capacity450 GB
  • Interface typeSAS 6Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Flash memory typeEnterprise
  • Rotational speed15,000 RPM

Capacity 450GB

  • 15000 RPM spindle cuts average latency to 2ms for rapid data access
  • SAS 6Gb/s interface delivers sustained transfers up to 204MB/s for heavy workloads
  • 16MB cache buffers bursts to smooth random I/O in server arrays
  • Third-generation perpendicular recording packs 450GB into a 3.5-inch form factor
  • Self-encrypting design with FIPS 140-2 certification secures data at rest

Enterprise SAS 6Gb/s Drive

The Seagate Cheetah 15K.7 ST3450857SS is a 450GB 3.5-inch internal hard drive built for server workloads. Its 15000 RPM spindle speed and 16MB cache serve transaction processing, email and decision-support applications. The SAS 6Gb/s interface connects directly to compatible enterprise backplanes and controllers. This bare drive is supplied new without retail packaging.

SAS 6Gb/s Interface Limits

The SAS 6Gb/s link caps sustained throughput at the bus level, so the drive’s 204MB/s maximum transfer rate cannot be exceeded. Average latency sits at 2ms with seek times of 3.4ms read and 3.9ms write. Ultra320 SCSI models exist in the same family but use a different connector and protocol. Systems without SAS ports cannot use this drive.

450GB Capacity and Headroom

At 450GB the drive holds operating systems, databases and log files for small-to-medium arrays. Third-generation perpendicular recording and Powertrim technology keep power draw in check during sustained I/O. Self-encrypting drive options with FIPS 140-2 certification address compliance needs. Larger datasets or long-term archival will require additional spindles or higher-capacity media.

How it compares

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

Price $221.99
Pricier than about 72% of the 4,938 comparable items (median $107.99).
Total capacity 450 GB
Lower than about 82% of the 2,372 comparable items (median 2 TB).
Price per TB $493.31 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 nameST3450857SS
Total capacity450 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 typeEnterprise
Cache memory16 MB
Ports & slots
Interface typeSAS 6Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight1.36 kg
Package size165 × 121 × 36 mm

Other versions of this model

2 more in the same range

Questions about this item

Should I choose the 450 GB 15 000 RPM model or a lower-capacity version for my server?

The 450 GB capacity combined with 15 000 RPM and 16 MB cache delivers the highest transaction throughput in the Cheetah 15K.7 line, making it the preferred choice for database and email workloads.

What does the 204 MB/s sustained rate mean once the drive is installed in a server?

In a SAS 6 Gb/s backplane the drive can stream sequential reads and writes at up to 204 MB/s, so large backup jobs or SAN replication tasks saturate the pipe before the drive becomes the bottleneck.

How does the SAS 6 Gb/s interface cap real-world performance?

The 6 Gb/s link supports the drive's 204 MB/s sustained throughput with headroom for command overhead, while the dual-port SAS architecture provides path redundancy for high-availability clusters.

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