Seagate ST318438LW SCSI Hard Drive

Seagate Part #/MPN: ST318438LW

DiscTech Item #: SGT-ST318438LW-RF-OE


Enterprise Grade

Capacity: 18GB

Speed: 7,200RPM

Interface Types: SCSI 68pin HD68

Form Factor: 3.5inx1.0in LFF Hard Drive

Sector Size: 512 / 512e

Average Seek Time: 8.5 / 9.3

Electrical Interface: SCSI LVD U160 - 160MBps 16-bit

On-Board Cache: 2MB

Seagate Barracuda 36ES2 18GB 7.2K U160 68pin SE LVD SCSI Hard Drive ST318438LW-Refurbished

Alt MPN: 9W8005-001

Barracuda 36ES2 drives combine giant magnetoresistive (GMR) heads, partial response/maximum likelihood (PRML) read channel electronics, embedded servo technology, and a wide SCSI Ultra160 interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers.

  • Integrated Ultra160 SCSI controller
  • Multimode SCSI drivers and receivers—single-ended (SE) and low voltage differential (LVD)
  • 16 bit I/O data bus on LW models. 8 bit I/O data bus on the N model.
  • Asynchronous and synchronous data transfer protocol
  • Firmware downloadable via SCSI interface
  • Selectable even-byte sector sizes from 512 to 4,096 bytes/sector
  • Programmable sector reallocation scheme
  • Flawed sector reallocation at format time
  • Programmable auto write and read reallocation
  • Reallocation of defects on command (post format)
  • Enhanced ECC maximum burst correction length of 240 bits with a guaranteed burst correction length of 233 bits.
  • Sealed head and disc assembly
  • No preventative maintenance or adjustment required
  • Dedicated head landing zone
  • Embedded servo design
  • Self diagnostics performed when power is applied to the drive
  • 1:1 Interleave
  • Zoned bit recording (ZBR)
  • Vertical, horizontal, or top down mounting
  • Dynamic spindle brake
  • 2,048 kbyte data buffer
  • Drive Self Test (DST)

ST-318438LW UNFORMATTED CAPACITY (GB) ________________ FORMATTED CAPACITY (GB) __________________19.923 AVERAGE SECTORS PER TRACK ________________748 rounded down ACTUATOR TYPE ____________________________ROTARY VOICE COIL TRACKS ___________________________________52,000 CYLINDERS ________________________________26,000 user HEADS ______PHYSICAL______________________2 DISCS (3.5 in) ___________________________1 MEDIA TYPE _______________________________THIN FILM/GMR RECORDING METHOD _________________________PRML 16/17 EPR4 INTERNAL TRANSFER RATE (mbits/sec)________434 to 500 INTERNAL FORMATTED TRANSFER RATE (MB/sec)_32.3 to 52.2 EXTERNAL TRANSFER RATE (mbyte/sec) _______40 Sync Low Voltage Differential(LVD) _______80/160 Sync SPINDLE SPEED (RPM) ______________________7,200 AVERAGE LATENCY (mSEC) ___________________4.17 BUFFER ___________________________________2048KB Read Look-Ahead, Adaptive, Multi-Segmented Cache INTERFACE ________________________________Ultra SCSI Wide Low Voltage Differential __________Ultra3-SCSI Wide ASA II, SCAM level 2 (1 default) BYTES PER TRACK __________________________401Kbytes avg SECTORS PER DRIVE ________________________38,914,048 TPI (TRACKS PER INCH) ____________________58,480 BPI (PEAK KBITS PER INCH) ________________480 AVERAGE ACCESS (ms read/write)____________8.5/9.3 Drive level without controller overhead4 SINGLE TRACK SEEK (ms read/write) ________0.6/1.0 MAX FULL SEEK (ms read/write) ____________10.0/10.7 MTBF (power-on hours) ____________________800,000 SHOCK (G's, 11/2/.5 ms): operating (Read/Write) __________/63/ abnormal ________________________ nonoperating (single event) _____/350/ ACOUSTICS (Bels typical) ________Idle ____2.0 Max ____ POWER DISSIPATION (watts/BTUs) Active ____/ Idle ______8.0/27.3 POWER REQUIREMENTS: +12V START-UP (amps) _2.05 +12V TYPICAL (amps) __0.31 idle +5V START-UP (amps) __0.82 +5V TYPICAL (amps) ___0.78 idle IDLE (watts) _________ LANDING ZONE (cyl) _______________________AUTO PARK IBM AT DRIVE TYPE ________________________0 or NONE Physical: Height (inches/mm): 1.0/25.4 Width (inches/mm): 4.00/101.6 Depth (inches/mm): 5.75/146 Weight (lbs/kg): 1.2/0.54 

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Alternate MPNs: 9W8005-001

Weight: 1.8 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