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Seagate Cheetah 15K.4 3.5 inch SAS hard drive bare drive

Seagate

Seagate ST3146854SS Cheetah 15K.4 147GB 15000 RPM SAS 3.5" internal hard drive

SKU CH-4GXY-NWN2S MPN ST3146854SS

A 147 GB SAS hard drive spinning at 15000 RPM with 8 MB cache and 3.5 ms average seek time for high-speed enterprise storage

  • Total capacity147 GB
  • Interface typeSerial Attached SCSI (SAS)
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed15,000 RPM
  • Cache memory8 MB
  • 15000 RPM spindle for rapid data access
  • SAS interface provides 3Gb/s transfer rate
  • 147GB capacity fits enterprise workloads
  • 5ms average seek time speeds read operations
  • Low power consumption reduces operating costs

Enterprise 15K SAS Drive

The Seagate Cheetah 15K.4 ST3146854SS is a 3.5 inch internal hard drive built for enterprise servers and storage arrays. It delivers 147GB of capacity on a Serial Attached SCSI interface spinning at 15000 RPM with an 8MB cache. The bare-drive unit is supplied new and carries the manufacturer's highest reliability rating.

Suited for High-IOPS Workloads

This drive suits administrators who need low latency and high transaction rates for databases, email servers or tiered storage pools. The 3.5ms average seek time and 2ms average latency support consistent random I/O performance. It is not for buyers who need larger capacities or solid-state endurance for write-intensive logging.

15000 RPM Spindle Speed

The 15000 RPM spindle speed is the single specification that determines whether this drive meets the performance window of the target application. It enables the 3Gb/s SAS transfer rate and the sub-4ms access times that define the 15K.4 class. Verify that the host backplane and controller support 3Gb/s SAS before purchase.

How it compares

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

Price $423.99
Pricier than about 90% of the 4,938 comparable items (median $107.99).
Total capacity 147 GB
Lower than about 94% of the 2,372 comparable items (median 2 TB).
Price per TB $2,884.29 per TB
Pricier than about 91% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineCheetah 15K.4
Model nameST3146854SS
Total capacity147 GB
Performance
Rotational speed15,000 RPM
Average seek time3.5 ms
Mean write time4.0 ms
Mean latency2 ms
Storage
Cache memory8 MB
Ports & slots
Interface typeSerial Attached SCSI (SAS)
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight0.91 kg
Package size127 × 127 × 127 mm

Questions about this item

How do I choose between the 146 GB and 147 GB capacity listings?

Both figures describe the same drive; 146 GB is the formatted capacity and 147 GB is the unformatted label used by Seagate.

What does the 15 000 RPM speed mean for actual system responsiveness?

The spindle rotates at 15 000 RPM, giving an average seek time of 3.5 ms and average latency of 2 ms for faster random access.

What does the SAS 3 Gb/s interface limit in practice?

The Serial Attached SCSI link caps the maximum external transfer rate at 3 Gb/s, which is the ceiling for sustained sequential throughput.

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