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Seagate ST318438LW SCSI Hard Drive
Item Number: SGT-ST318438LW-RF-OE
Manufacturer's Part Number: ST318438LW |
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Seagate Barracuda 36ES2 18GB 7.2K U160 68pin SE LVD SCSI Hard Drive ST318438LW-Refurbished
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Capacity: 18GB
Spindle Speed: 7,200RPM
Interface Type: SCSI 68pin / HD68 Female
Disk Size: 3.5"x1.0" (Low Profile Hard Drive)
Sustained Throughput (MBps):
Average Seek Time (read/write ms): 8.5 / 9.3
Electrical Interface Speed: SCSI LVD U160 - 160MBps 16-bit
On-Board Cache: 2MB |
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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)
Compatibility
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SEAGATE TECHNOLOGY LLC
1-800-SEAGATE
http://www.seagate.com
(C)opyright 2002
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
Click here to view the manufacturers item description/brochure |
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