Seagate ST118273FC 18GB Fibre Channel Hard Drive

Seagate Part #/MPN: ST118273FC

DiscTech Item #: SGT-ST118273FC-RF-OE


Capacity: 18GB

Speed: 7,200RPM

Interface Types: Fibre Channel - Internal - Arbitrated Loop ASA II

Form Factor: 3.5inx1.0in LFF Hard Drive

Sector Size: 512 / 512e

Sustained Throughput: 120/190

Average Seek Time: 7.8 ms

Electrical Interface: FC-AL - 2Gbps

On-Board Cache: 1MB

Seagate Barracuda 18FC ST118273FC 18GB 3.5in 7.2K RPM FC-AL HDD - Refurbished

Seagate Barracuda 18FC ST118273FC 18GB 3.5" 2Gb/s 7200 RPM Fibre Channel - Internal Arbitrated Loop ASA II Hard Disk Drive

General Description
Barracuda 18FC drives are random access storage devices designed to support the Fibre Channel Arbitrated Loop (FC-AL) and SCSI Fibre Channel Protocol as described in the ANSI specifications, this document, and the Fibre Channel Interface Manual (part number 77767496) which describes the general interface characteristics of this drive. ST118273FC drives are classified as intelligent peripherals and provide level 2 conformance (highest level) with the ANSI SCSI-1 standard.

You can view the Fibre Channel interface simply as a transport vehicle for the supported command set (ST118273FC drives use the SCSI command set). In fact, the Fibre Channel interface is unaware of the content or meaning of the information being transported. It simply packs the SCSI commands in frames, transports them to the appropriate devices, and provides error checking to ensure that the information reaches its destination accurately.

The head and disc assembly (HDA) is environmentally sealed at the factory. Air recirculates within the HDA through a non-replaceable filter to maintain a contamination-free HDA environment.

Barracuda 18FC drives use a dedicated landing zone at the innermost radius of the media to eliminate the possibility of destroying or degrading data by landing in the data zone. The heads automatically go to the landing zone when power is removed from the drive.

An automatic shipping lock prevents potential damage to the heads and discs that results from movement during shipping and handling. The shipping lock disengages and the head load process begins when power is applied to the drive.

The drives also use a high-performance actuator assembly design that provides excellent performance with minimum power dissipation.

Standard Features
Barracuda 18FC drives have the following standard features:

  • Integrated dual port FC-AL controller
  • Concurrent dual port transfers
  • Support for FC arbitrated loop and private loop attachment
  • Differential copper FC drivers and receivers
  • Downloadable firmware using the FC-AL interface
  • Drive selection ID and configuration options are set on the FC-AL backpanel or through interface commands. Jumpers are not used on the drive.
  • Fibre Channel worldwide name uniquely identifies the drive and each port
  • User-selectable logical block size (512 to 4,096 bytes)
  • Selectable frame sizes from 128 to 2,112 bytes
  • Industry standard 3.5-inch half height form factor dimensions
  • Programmable logical block reallocation scheme
  • Flawed logical block reallocation at format time
  • Programmable auto write and read reallocation
  • Reed-Solomon error correction
  • Sealed head and disc assembly (HDA)
  • No preventive maintenance or adjustments required
  • Dedicated head landing zone
  • Automatic shipping lock
  • Embedded Grey Code track address to eliminate seek errors
  • Self-diagnostics performed at power on
  • 1:1 interleave
  • Zone bit recording (ZBR)
  • Vertical, horizontal, or top down mounting
  • Dynamic spindle brake
  • 1,024 Kbyte data buffer
  • Embedded servo design
  • Supports SCSI enclosure services via interface connector
  • Supports up to 32 initiators
  • Reallocation of defects on command (Port Format)
  • Fibre Channel interface transports SCSI protocol

Media Description
The media used on the drive has a diameter of approximately 95 mm (approximately 3.7 inches). The aluminum substrate is coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability and environmental protection.


  • Programmable multi-segmentable cache buffer
  • 106 Mbytes/sec maximum instantaneous data transfers per port
  • 7,200 RPM spindle; average latency = 4.17 msec
  • Command queuing of up to 128 commands
  • Background processing of queue
  • Supports start and stop commands
  • Adaptive seek velocity; improved seek performance


  • 1,000,000 hour MTBF
  • LSI circuitry
  • Balanced low mass rotary voice coil actuator
  • Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)
  • Dithering


This drive is compatible with any server that accepts 3.5inx1.0in LFF Fibre Channel Drive.

Barracuda 18FC Disc Drive
Standard Model NumberST118273FC
Internal Drive CHaracteristics
Read/Write data heads20
Bytes per track155,000 Bytes
Bytes per surface1,165 Mbytes
Cylinders/tracks per surface7,501 Tracks
Tracks per inch8,250 TPI
Internal data rate120-190 Mbits/sec
Disc rotation speed7,200 rpm
Avg rotation latency4.17 msec

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Weight: 1.5 lb

Warranty: 1 Year DiscTech


Condition Levels Explained

These products have had NO problems or failures, they merely have some usage. The product has been professionally returned to excellent condition. These items have been fully tested, formatted (if appropriate) &repackaged. Hard drives are fully vetted for surface defects and wear, only healthy disks are approved for resale to our customers. Please see our refurbishing process for more details. Watch a video about our refurbishing process

1 Year DiscTech Warranty

Product Warranties Explained

The product has a DiscTech warranty for the time period specified. View our limited warranty