Seagate ST318405LW Cheetah 36XL 18GB Ultra160 SCSI front view Seagate ST318405LW Cheetah 36XL 18GB Ultra160 SCSI front view
Seagate ST318405LW Cheetah 36XL 18GB Ultra160 SCSI front view Seagate ST318405LW Cheetah 36XL 18GB Ultra160 SCSI front view
Seagate ST318405LW top view Seagate ST318405LW top view
Seagate ST318405LW angled view Seagate ST318405LW angled view
Seagate ST318405LW Cheetah 36XL 18GB Ultra160 SCSI front view
Seagate ST318405LW Cheetah 36XL 18GB Ultra160 SCSI front view
Seagate ST318405LW top view
Seagate ST318405LW angled view

Seagate

Seagate ST318405LW – 18.35GB Ultra160 SCSI 68-Pin | 3.5" | 10,000 RPM | Legacy HDD

$225.00

Brand New, Factory Sealed | In Stock | Bulk Orders Available

The ST318405LW is an 18.35GB Ultra160 SCSI hard drive featuring 10,000 RPM spindle speed, 4MB cache buffer, and 5.2ms average seek time in a 3.5" low-profile form factor. Built for late 1990s and early 2000s server and workstation systems, it is ideal for legacy system restoration, vintage computing projects, and enterprise storage retrofits. Compatible with 68-pin Ultra160 SCSI controllers and systems requiring LVD (Low Voltage Differential) interface support. Engineered with rotary voice coil actuators and thin film GMR heads for reliable continuous operation in demanding server environments.

All products from Anand International ship brand new and factory sealed. Volume and B2B pricing available for qualified buyers.
Specifications
  • Manufacturer: Seagate
  • Model: ST318405LW
  • Capacity: 18.35GB
  • Interface: Ultra160 SCSI 68-Pin
  • Spindle Speed: 10,000 RPM
  • Cache: 4MB
  • Form Factor: 3.5" Low Profile
  • Seek Time: 5.2ms average
  • Latency: 2.99ms
  • MTBF: 1,000,000 hours
  • Drive Type: Enterprise Legacy HDD
  • Warranty: 90 days
  • Shipping: Free domestic US shipping
  • Condition: Brand New, Factory Sealed
Product Features
  • Ultra160 SCSI interface with 160MB/s transfer rate
  • 10,000 RPM spindle speed for fast data access
  • 4MB read look-ahead adaptive cache buffer
  • 5.2ms average seek time for rapid response
  • 68-pin LVD connector for enterprise compatibility
  • 3.5" low-profile form factor
  • Rotary voice coil actuator technology
  • Thin film GMR recording heads
  • Direct replacement for legacy systems requiring SCSI connectivity
  • 90-day Anand International warranty on all legacy stock
  • Free domestic US shipping included
  • Volume and B2B pricing available for qualified buyers
Compatibility

Compatible with SCSI-3 Ultra160 controllers, Sun workstations, HP-UX systems, legacy Compaq servers, and vintage enterprise storage arrays requiring 68-pin SCSI drives. Not compatible with modern SATA or SAS interfaces, standard IDE/PATA systems, or modern servers without SCSI controller cards.
Shipping & Returns
  • Free Shipping: We currently offer free Economy Shipping within the continental U.S. with no minimum order required. Expedited shipping is available at standard carrier rates.
  • Same-Day Shipping: Order placed before 2PM PST will ship the same day. Orders received after this time will ship the following business day.
  • Hassle-Free Returns: If you're not completely satisfied with your purchase, simply return it within 10 days for a hassle-free refund or exchange.

18.35GB Ultra160 SCSI 10K RPM 4MB Cache Factory Sealed

Why the ST318405LW is the right Legacy Enterprise HDD

Part of Seagate's fifth-generation Cheetah 36XL series, this drive represents the pinnacle of late 1990s SCSI technology. With 10,000 RPM performance and Ultra160 interface speeds up to 160MB/s, it delivered enterprise-class reliability for mission-critical applications. The combination of fast seek times, adaptive caching, and robust construction made it ideal for server environments requiring continuous operation.

Ultra160 SCSI Performance

Delivers 160MB/s sustained throughput with LVD signaling for maximum data transfer efficiency in enterprise storage systems.

10K RPM Enterprise Speed

High-speed spindle provides 5.2ms average seek time and 2.99ms latency for responsive application performance.

4MB Adaptive Cache Buffer

Multi-segmented cache with read look-ahead optimizes data throughput for sequential and random access patterns.

Legacy System Compatibility

68-pin connector works with vintage SCSI controllers in Sun, HP, Compaq, and other enterprise systems from the late 1990s era.

New Old Stock with 90-Day Warranty

Available as brand new, factory sealed old stock units from Anand International with a 90-day warranty. Ideal for legacy system maintenance, vintage computing restoration, and hard-to-find replacement needs.

Frequently Asked Questions

Frequently asked questions for SCSI, including information on usage, configuration, and compatibility.

1. What is a SCSI hard drive?

A SCSI (Small Computer System Interface) hard drive is a legacy enterprise storage device that connects using parallel ribbon cables. SCSI was widely used in servers, workstations, and storage arrays before newer technologies like SAS and SATA became standard.
2. What systems are SCSI hard drives compatible with?

SCSI drives are designed for older servers, RAID controllers, and storage arrays that have SCSI interfaces. They are commonly used today to maintain or repair legacy IT infrastructure.
3. What’s the difference between SCSI and SAS?

SCSI uses parallel communication and bulky ribbon cables, with speeds up to 320 MB/s. SAS (Serial Attached SCSI) is the modern successor, offering serial communication, smaller connectors, dual-port redundancy, and speeds up to 24 Gb/s.
4. Can SCSI hard drives still be used in modern systems?

Most modern computers don’t have SCSI ports. To use a SCSI drive, you’ll need a compatible SCSI controller card or an external enclosure designed for parallel SCSI.
5. What capacities are available for SCSI hard drives?

SCSI hard drives were typically available in capacities ranging from a few gigabytes to several hundred gigabytes. Larger capacities are rare compared to modern SATA and SAS drives.
6. Are SCSI hard drives hot-swappable?

Yes, many SCSI drives used in enterprise servers were hot-swappable when paired with a compatible RAID backplane or enclosure. This allowed replacement without shutting down the system.
7. Why are SCSI hard drives still used today?

SCSI hard drives remain important for maintaining legacy servers, specialized equipment, and industrial systems where upgrading to newer storage technologies isn’t possible or practical.