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Barracuda Product Shot
Technical Specifications
Model number ST39236LW
Model Name Barracuda 18XL
Form Factor(width) 3.5"
Form Factor(height) low-profile
  Physical Specifications
Height 25.4 mm
Width 101.6 mm
Length 146.05 mm
Weight 0.68 kg
Formatted Capacity 9.2 Gbytes, formatted
Interface Type 68-pin
  Transfer Rates  
Internal Transfer Rate (min) 195 Mbits/sec
Internal Transfer Rate (max) 315 Mbits/sec
Formatted Int Transfer Rate (min) 18.500000 Mbits/sec
Formatted Int Transfer Rate (max) 29.400000 Mbits/sec
External (I/O) Transfer Rate (max) 160 MBytes/sec
Avg Formatted Transfer Rate 23.9 MBytes/sec
  Seek Times  
Average Seek Time, Read 5.8 msec typical
Average Seek Time, Write 6.3 msec typical
Track-to-Track Seek, Read 0.5 msec typical
Track-to-Track Seek, Write 0.5 msec typical
Full Disc Seek, Read 10.3 msec typical
Full Disc Seek, Write 10.8 msec typical
Average Latency 4.17 msec
Default Buffer (cache) Size 2,048 Kbytes
Spindle Speed 7200 RPM
Spinup Time 25 sec
Power-on to Ready Time 15 sec
Number of Discs (physical) 2
Number of Heads (physical) 3
Total Cylinders 14,384
Total Tracks 43,152
Bytes Per Sector 512
Areal Density (Mbits/sq in) 5,956 Mbits/square inch
Track Density (TPI) 18,145 tracks/inch
Recording Density (BPI, max) 328,272 bits/inch
Sectors/Track (avg) 426
Bytes/Track (avg) 218,112
  Recording Components  
Recording Method EPRML
  Electrical Requirements
Typical Current (12VDC +/- 5%) 0.5 amps
Startup Current (12VDC +/- 5%) 0.8 amps
Typical Current (5VDC +/- 5%) 0.9 amps
Startup Current (5VDC +/- 5%) 1 amps
Idle Power (typ) 6.9 watts
  Environmental Specifications
  Shock and Vibration  
Max Operating Shock (11-msec) 15 Gs
Max Nonoperating Shock (11-msec) 150 Gs
Operating Vibration (max) 1.1 Gs
Nonoperating Vibration (max) 2.5 Gs
  Temperature and Humidity  
Operating Temperature (max) 55 deg C
Operating Temperature (min) 5 deg C
Nonoperating Temperature (max) 70 deg C
Nonoperating Temperature (min) -40 deg C
Operating Temperature Change (max) 20 deg C/hr
Nonoperating Temperature Change (max) 25 deg C/hr
Operating Humidity (max) 95 percent
Nonoperating Humidity (max) 95 percent
Operating Humidity Change (max) 10 percent per hour
Operating Wet Bulb Temp (max) 28 deg C
Operating Altitude (max) 3,000 m
Operating Altitude (min) -300 m
Nonoperating Altitude (max) 12,200 m
Nonoperating Altitude (min) -300 m
Acoustics, Idle (sound power, typ) 3.5 Bels
MTBF (Hours) 1,200,000 hours
Recoverable Read Errors 10 per 1011 bits read
Nonrecoverable Read Errors 1 per 1016 bits read
Seek Errors 1 per 108 bits read
Supports S.M.A.R.T. Yes
Service Life 5 year(s)
Limited Warranty Period 5 year(s)
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