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Silver 3.5 inch bare hard drive with 68 pin SCSI connector

Seagate

Seagate Cheetah 15K.4 ST336754LW 36.7GB 15000 RPM 8MB SCSI Ultra320 68pin 3.5" internal hard drive

SKU CH-89RQ-VZ57B MPN ST336754LW

A 36.7 GB, 15 000 RPM SCSI Ultra320 drive with 8 MB cache and 3.5 ms seek time

  • Total capacity36.7 GB
  • Interface typeSCSI Ultra320 68pin
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed15,000 RPM
  • Cache memory8 MB
  • 15,000 RPM spindle speed cuts average seek to 3.5 ms
  • 320 MB/s SCSI Ultra320 bus moves large files fast
  • 8 MB cache buffers bursts for smoother throughput
  • 7 GB capacity in a 1.0-inch 3.5" form factor fits tight bays
  • Industry-leading reliability rating protects critical data

Enterprise Server Storage

The Seagate Cheetah 15K.4 ST336754LW is a 36.7GB 3.5-inch internal hard drive built for enterprise servers and legacy workstations. It spins at 15000 RPM with an 8MB cache and connects via a SCSI Ultra320 68pin interface. The bare drive delivers a 3.5ms average seek time and 2ms average latency for high-throughput workloads.

Compatibility Constraints

This drive suits administrators maintaining older SCSI-based arrays or replacing failed units in existing Ultra320 environments. It is not for systems lacking a compatible SCSI Ultra320 68pin host bus adapter or backplane. Buyers needing larger capacities or different physical interfaces must select alternative storage solutions.

Decisive Specification

The SCSI Ultra320 68pin interface is the single specification that determines whether this drive fits the target system. Without a matching 68-pin SCSI controller or backplane, the drive cannot be installed or recognised. Confirm the host 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 $184.99
Pricier than about 66% of the 4,938 comparable items (median $107.99).
Total capacity 36.7 GB
Lower than about 99% of the 2,372 comparable items (median 2 TB).
Price per TB $5,040.60 per TB
Pricier than about 93% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineCheetah 15K.4
Model nameST336754LW
Total capacity36.7 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 typeSCSI Ultra320 68pin
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight0.64 kg
Package size147 × 102 × 25 mm

Questions about this item

How do I install the ST336754LW into a 3.5" bay and what step is often missed with the 68-pin Ultra320 SCSI connector?

Mount the 1.0-inch high drive in a 3.5" bay, attach the 68-pin Ultra320 SCSI cable, set a unique SCSI ID with the jumpers, and terminate the bus at the last device — the ID and termination steps are the ones most often missed.

What maintenance or replacement will the Cheetah 15K.4 need later?

The 15000 RPM mechanical drive has no user-serviceable parts; plan to replace the entire unit when SMART attributes indicate wear or after the five-year limited period.

What limit appears first under sustained use on the ST336754LW?

The 15000 RPM spindle and 3.5 ms average seek generate heat that typically hits the thermal envelope before the 320 MB/s Ultra320 bus saturates.

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