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Silver 3.5 inch SCSI hard drive bare unit

Seagate

Seagate Cheetah 15K.5 ST373455LW 73.4GB 15000 RPM 16MB SCSI Ultra320 68pin 3.5" internal hard drive

SKU CH-KFJA-A79TB MPN ST373455LW

73.4 GB 3.5-inch SCSI Ultra320 drive spins at 15000 RPM with 16 MB cache for fast server storage

  • Total capacity73.4 GB
  • Interface typeSCSI Ultra320 68pin
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed15,000 RPM
  • Cache memory16 MB
  • 15,000 RPM spindle cuts average latency to 2 ms
  • 16 MB cache absorbs burst I/O for smoother throughput
  • Ultra320 SCSI 68-pin interface delivers 320 MB/s peak bandwidth
  • 4 GB capacity in a 3.5-inch, 1.0-inch low-profile form factor
  • Brand-new bare drive covered by a 30-day seller warranty

Server-Grade SCSI Drive

The Seagate Cheetah 15K.5 ST373455LW is a 3.5 inch internal hard drive built for high-performance server and workstation environments. It delivers 73.4GB of storage on a SCSI Ultra320 68pin interface with a 15000 RPM spindle speed and 16MB cache.

Low-Capacity SCSI Specialist

This drive suits administrators maintaining legacy SCSI Ultra320 arrays that require the 68pin connector and 15000 RPM rotational speed. It is not for systems lacking a compatible SCSI Ultra320 controller or for deployments needing capacities beyond 73.4GB.

Ultra320 68pin Interface

The single specification that decides fit is the SCSI Ultra320 68pin interface; the drive will only function in backplanes or controllers that provide this exact connection.

How it compares

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

Price $241.99
Pricier than about 75% of the 4,938 comparable items (median $107.99).
Total capacity 73.4 GB
Lower than about 98% of the 2,372 comparable items (median 2 TB).
Price per TB $3,296.87 per TB
Pricier than about 92% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineCheetah 15K.5
Model nameST373455LW
Total capacity73.4 GB
Performance
Rotational speed15,000 RPM
Mean latency2 ms
Storage
Cache memory16 MB
Ports & slots
Interface typeSCSI Ultra320 68pin
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight1.36 kg
Package size160 × 122 × 33 mm

Questions about this item

How do I connect the 68-pin SCSI Ultra320 interface and set the drive ID correctly?

Plug the 68-pin SCSI Ultra320 connector into a matching controller cable, then use the rear jumpers to assign a unique SCSI ID from 0 to 15 so it does not conflict with other devices on the bus.

Will the 16 MB cache or 15000 RPM spindle require any periodic service or replacement?

The sealed 3.5 inch mechanism has no user-serviceable parts; the 16 MB cache and 15000 RPM spindle are maintenance-free for the life of the drive.

At what point does the 2 ms average latency become the limiting factor during sustained transfers?

The 2 ms average latency is a fixed mechanical characteristic; it defines the minimum random-access delay long before any throughput ceiling is reached.

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