Seagate Cheetah 18LP FC ST318251FC / 9P2004-001 18GB

Seagate Part #/MPN: ST318251FC

DiscTech Item #: SGT-ST318251FC-RF-OE

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    Special Order - Ships in 5-10 business days

    This item has a lead time for fulfilment (as listed), this is approximate. Your credit card will be authorized in full on the day of ordering; it will not be charged until the day of shipment.


Enterprise Grade

Capacity: 18GB

Speed: 10,000RPM

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

Form Factor: 3.5inx1.0in LFF Hard Drive

Sector Size: 512 / 512e

Sustained Throughput: 193-300

Average Seek Time: 5.4/6.0

Electrical Interface: FC-AL - 2Gbps

Seagate Cheetah 18LP FC ST318251FC / 9P2004-001 18GB 3.5" FC-AL HDD - Refurbished

Cheetah 18LP FC General Description

CheetahTM 18LP FC drives combine dual stripe magneto resistive (DSMR) heads, partial response/maximum likelihood (PRML) read channel electronics, embedded servo technology, and a Fibre Channel interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers.

Cheetah 18LP FC drives are random access storage devices designed to support the Fibre Channel Arbitrated Loop (FC-AL) and SCSI Fibre Channel Protocols. Cheetah 18LP FC drives are classified as intelligent peripherals and provide level 2 conformance (highest level) with the ANSI SCSI-1 standard.

Cheetah 18LP FC drives have the following standard features:

  • Integrated dual port FC-AL controller
  • Concurrent dual port transfers
  • Support for FC arbitrated loop, private and public attachment
  • Differential copper FC drivers and receivers
  • Downloadable firmware using the FC-AL interface
  • Supports SCSI enclosure services via interface connector
  • 128-deep task set (queue)
  • Supports up to 32 initiators
  • Drive selection ID and configuration options are set on the FC-AL backpanel or through interface commands. Jumpers are not used on the drive.
  • Supports SCSI Enclosure Services through the interface connector
  • Fibre Channel worldwide name uniquely identifies the drive and each port
  • User-selectable logical block size (512 to 4,096 bytes per logical block)
  • Selectable frame sizes from 128 to 2,112 bytes
  • Industry standard 3.5-inch low profile 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 code
  • 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
  • Reallocation of defects on command (Post Format)
  • Fibre Channel interface transports SCSI protocol


  • Programmable multi-segmentable cache buffer
  • 106 Mbytes/sec maximum instantaneous data transfers per port
  • 10,016 RPM spindle; average latency = 2.99 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.

Cheetah 18LP FC Disc Drive
Model NumberST318251FC
Alt Model Number9P2004-001
Drive capacity18.2 GB
Read/write data heads12
Bytes per track153,284 -229,045 Bytes (average, rounded off values)
Bytes per surface (total)1,913 Mbytes (unformatted, rounded off value)
Tracks per surface (total)9,801 Tracks (user accessible)
Tracks per inch12,580 TPI
Peaksbits per inch252 KBPI
Internal data rate193-300 Mbits/sec (variable with zone)
Disc rotation speed10,016 rpm (+ 0.5%)
Avg rotation latency2.99 msec
Data buffer to/from disc media
  • Minimum: 22.7 Mbytes/sec
  • Average: 29.5 Mbytes/sec
  • Maximum: 36.2 MBytes/sec
  • Fivre Channel Interface maximum instantaneous transfer rate106 Mbytes/sec per port
    Logical block size
  • Default is 512-byte data block
  • Variable 512 to 4,096 bytes per sector in even number bytes per secoter.
  • Read/write consecutive secotors on a trackYes
    Flae reallocation performance impactNegiligible
    Overhead time for head switch in sequential mode0.8 msec
    Overhead time for one track cylinder switch in sequetial mode1.2 msec (typical)
    Average rotational latency2.99 msec
    Seek error rateLess than 10 errors in 10^8
    Read Error Rates
  • Recovered Data: Less than 10 erros in 10^12 bits transferred
  • Unrecoverd Data: Les than 1 sector in 10^8 bits transferred
  • Miscrrected Data: Less than 1 sector in 10^21 bits transferd
  • Interface error rates
  • Less than 1 error in 10^12 bits transferred with minimum receive eye
  • Less than 1 error in 10^14 bits transferred with typical receive eye
  • MTBF1,000,000 hours
    Typical power dissipation under idle conditions12.1 watts
    Maximum wet bulb temperature82°F (28°C)
    Operating Temperature41°F to 122°F (5°C to 50°C)
    Non-operating Temperature–40° to 158°F (–40° to 70°C)
    Relative humidity opererating5% to 95% non-condensing relative humidity with a maximum gradient of 10% per hour
    Relative humidity Non-operating5% to 95% non-condensing relative humidity.)
    Effective altitude (sea level) Operating–1,000 to +10,000 feet (–305 to +3,048 meters)
    Effective altitude (sea level) Non-operating82°F (28°C)
    Vibration Operating - normal5-400 Hz @ 0.5 G
    Vibration Operating - abnormal15 minutes of duration at major resonant frequency 5-400 Hz @ 0.75 G (X, Y, or Z axis)
    Vibration Non- operating
  • 5-22 Hz @ 0.040 inches (1.02 mm) displacement
  • 22-400 Hz @ 2.00 G
  • Air cleanlinessThe drive is designed to operate in a typical office environment with minimal environmental control.
    AcousticsSound power during idle mode shall be 4.3 bels typical when measured to ISO 7779 specification
    Weight1.3pounds/0.589 kilograms

    Click here to view the manufacturer's item description/brochure

    Alternate MPNs: 9P2004-001

    Weight: 2.5 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