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Seagate 3.5 inch SCSI hard drive silver metal enclosure

Seagate

Seagate ST318404LW 18GB 10000 RPM 4MB Cache SCSI 3.5" internal hard drive

SKU CH-Q3KR-7BR6H MPN ST318404LW

18 GB 10000 RPM SCSI hard drive for enterprise storage in 3.5 inch form factor

  • Total capacity18 GB
  • Interface typeSCSI
  • Form factor3.5 in (8.89 cm)
  • Rotational speed10,000 RPM
  • Cache memory4 MB
  • Recommended useFor Enterprise Storage
  • 10000 RPM spindle speed accelerates data access for demanding enterprise workloads
  • 4 MB on-board cache buffers bursts to sustain throughput under heavy I/O
  • 18 GB capacity fits legacy SCSI arrays and replacement scenarios
  • 5 inch form factor mounts in standard server drive bays
  • SCSI interface connects directly to compatible controllers without adapters

Enterprise SCSI storage drive

The Seagate ST318404LW is an 18 GB 3.5-inch internal hard drive built for enterprise storage workloads. It spins at 10000 RPM with a 4 MB cache and uses a SCSI interface. The drive is supplied new and carries a five-year limited warranty from the manufacturer.

SCSI host integration

Installation requires a compatible SCSI host adapter and an available 3.5-inch drive bay with standard mounting points. The SCSI bus handles command queuing and multiple device addressing, freeing the system CPU from direct storage management. Power and termination must be provided according to the host adapter specification.

Legacy capacity upgrade

This drive replaces earlier lower-capacity or lower-RPM SCSI disks in servers and workstations that still rely on the SCSI bus. The jump is worth it when an existing array needs more space or faster spindle speed without migrating to a newer interface. It does not suit systems that lack SCSI support or that require larger modern capacities.

How it compares

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

Price $174.99
Pricier than about 64% of the 4,938 comparable items (median $107.99).
Total capacity 18 GB
Lower than about 99% of the 2,372 comparable items (median 2 TB).

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Specifications

Product
Model namest318404lw
Total capacity18 GB
Recommended useFor Enterprise Storage
Performance
Rotational speed10,000 RPM
Storage
Cache memory4 MB
Ports & slots
Interface typeSCSI
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight0.91 kg
Package size152 × 102 × 51 mm

Questions about this item

How does the 10000 RPM spindle speed affect sustained throughput on the SCSI bus?

The 10000 RPM rotation reduces rotational latency, so sequential reads and writes stay closer to the SCSI bus ceiling during long transfers.

What thermal and acoustic profile should I expect when the drive runs continuously in an enterprise array?

A 10000 RPM 3.5-inch mechanism produces noticeable whine and heat; plan for active airflow across the chassis bays.

Which SCSI host adapter and cable type are required to connect this 3.5-inch drive?

You need a compatible SCSI host adapter with the matching connector and a terminated SCSI cable for the 3.5-inch form factor.

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