Specifications
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Following are the specifications for the Seagate 73 GB Ultra320 SCSI hard drive.

Feature Specification
Formatted Capacity 73.4 GB
Average Sectors per Track 789 rounded down
Actuator Type Rotary voice coil
Tracks 181,548
Cylinders 90,774 user
Heads (Physical) 2
Discs 1
Media Type Thin film/GMR
Recording Method PRML
Internal Transfer Rate 470 to 944 mbits/sec
Internal Formatted Transfer Rate 59 to 118 MB/sec
External Transfer Rate
  • 40 Sync mbyte/sec
  • Low Voltage Differential(LVD) 80/320 Sync
  • Spindle Speed 10,008 RPM
    Average Latency 3.00 mSEC
    Buffer 8 MB
    Interface Ultra-SCSI Wide
    • Low Voltage Differential Ultra3-SCSI Wide
    • ASA II, SCAM level 2 (1 default)
    Bytes per Track 556K avg
    Sectors per Drive 143,374,744
    Tracks per Inch (TPI) 105,000
    Peak Kbits per Inch (BPI) 658
    Average Access 4.7/5.3 ms read/write; Drive level without controller overhead
    Single Track Seek 0.2/0.5 ms read/write
    Max Full Seek 9.5/10.3 ms read/write
    Annualized Failure Rate (AFR) 0.62%
    Shock G's, 11/2/.5 ms:
    • operating (Read/Write) 15/60/
    • Non-operating 75/225/120
    Acoustics 3.3 Bels typical, sound power
    Power Requirements
  • +12V START-UP (amps) 1.56
  • +12V TYPICAL (amps) 0.34 idle
  • +5V START-UP (amps) 0.77
  • +5V TYPICAL (amps) 0.54 idle
  • Dimensions (H × W × D) 1.0 × 4.00 × 5.75 inches (25.4 × 101.6 × 146 mm)
    Weight 1.6 lbs (0.726 kg)