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Silver rectangular 3.5 inch hard drive with circuit board visible

Seagate

Seagate ST318404LCProduct Cheetah 18XL 18.40 GB 3.5" 10000 rpm SCSI laptop hard drive

SKU CH-G7RM-T6VEH MPN ST318404LCProduct

A new 18.40 GB Cheetah 18XL laptop hard drive spins at 10000 rpm on a 3.5-inch SCSI Ultra160 interface

  • Flash memory typeHard Drive
  • 40 GB capacity stores critical data
  • 10000 rpm spindle speed accelerates access
  • Ultra160 SCSI interface delivers 160 MB/s throughput
  • 5 inch form factor fits standard bays
  • Seagate Cheetah 18XL reliability since 1979

New 18.40 GB SCSI Drive

This is a new Seagate Cheetah 18XL hard drive with an 18.40 GB capacity and a 3.5 inch form factor. It spins at 10000 rpm and connects via an Ultra160 SCSI interface. The unit carries a 1 MB buffer.

For Legacy SCSI Maintenance

It suits technicians who need a direct replacement drive for older servers or workstations that still use the Ultra160 SCSI bus. It is not for builders assembling modern systems, for users who require larger capacities, or for anyone without a compatible SCSI controller.

Ultra160 SCSI Interface Decides Fit

The single specification that determines compatibility is the Ultra160 SCSI interface. The host system must provide a matching wide SCSI connector and controller support for this drive to function.

How it compares

Measured against everything we stock in 2.5-Inch Internal Laptop HDDs, at today’s prices. Recalculated every night.

Price $73.99
Typical for this category: the median of 645 items is $66.99.

New to this? Paying with USDT: TRC-20 or ERC-20 — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameSeagate
Storage
Flash memory typeHard Drive

Questions about this item

How do I verify the ST318404LC is running at the correct 10000 rpm after installation?

The drive should be recognised by the SCSI BIOS at boot and report 18.40 GB capacity. Listen for the characteristic high-pitched whine of a 10000 rpm spindle and check SMART data for zero reallocated sectors.

What comes in the box with the Cheetah 18XL and what must I supply myself?

The drive itself is supplied in retail or OEM packing which may vary. You must provide a 68-pin Ultra160 SCSI cable, an active SCSI terminator, a 4-pin Molex power connector and a 3.5-inch drive bay or mounting bracket.

Which Cheetah 18XL capacity should I choose for a legacy SCSI server?

This model is the single 18.40 GB variant (ST318404LC). No other capacities exist in the 18XL series, so select this part number when you need an 18 GB Ultra160 SCSI drive for a 3.5-inch bay.

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