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Silver 3.5 inch bare hard drive with 80 pin SCSI connector

Seagate

Seagate ST3300655LC 300GB 15000 RPM 16MB SCSI Ultra320 80pin 3.5" internal hard drive

SKU CH-JJXV-9S4T1 MPN ST3300655LC

A 300 GB, 15 000 RPM SCSI Ultra320 80-pin 3.5" internal hard drive with 16 MB cache

  • Total capacity300 GB
  • Interface typeSCSI Ultra320 80pin
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Flash memory typeHard Drive
  • Rotational speed15,000 RPM
  • 15000 RPM spindle cuts average latency to 2 ms
  • 16 MB cache buffers bursts for smoother throughput
  • SCSI Ultra320 80-pin interface delivers 320 MB/s bandwidth
  • 300 GB capacity on perpendicular recording platters
  • 5-inch form factor fits standard server bays

Capacity and interface

This is a Seagate Cheetah 15K.5 desktop internal hard drive with 300GB capacity and a SCSI Ultra320 80pin interface. It spins at 15000 RPM and includes 16MB cache for enterprise workloads. The 3.5 inch form factor fits standard drive bays. The unit is supplied as a bare drive.

Enterprise workloads vs other needs

It suits administrators maintaining legacy SCSI storage arrays or servers that require the 80pin connection and 15000 RPM performance. Buyers who need a different interface or larger capacities should look at something else. The bare drive packaging means no cables or mounting hardware are included.

SCSI Ultra320 80pin interface

The single specification that decides compatibility is the SCSI Ultra320 80pin interface. Your host adapter or backplane must provide this exact connection for the drive to function. Verify the interface 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 $255.99
Pricier than about 77% 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 $853.30 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.5
Model nameST3300655LC
Total capacity300 GB
Performance
Rotational speed15,000 RPM
Mean latency2 ms
Storage
Flash memory typeHard Drive
Cache memory16 MB
Ports & slots
Interface typeSCSI Ultra320 80pin
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight1.36 kg
Package size244 × 226 × 69 mm

Questions about this item

How long before the 15000 RPM spindle hits its thermal limit under sustained writes?

The 2ms average latency spec is measured at steady-state temperature, so the drive is designed to maintain that figure continuously.

What noise and heat should I expect from the 15000 RPM mechanism running all day?

The 15000 RPM Cheetah 15K.5 runs hotter and louder than slower drives; plan for active airflow across the 3.5" chassis.

Which controller card or backplane do I already need for the SCSI Ultra320 80pin interface?

You need a SCSI Ultra320 host adapter or backplane with an 80-pin connector; the bare drive has no onboard controller.

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