Specifications
Part number 5502235,5502263

Commodity SCSI hard drive
Manufacturer Seagate
Model number ST318406LW
Data buffer 4,096 KB
Interleave 1:1
Number of active heads 2
Number of I/O connector pins 68
Number of I/O data bus bits 16
Data buffer size 4 MB
Performance
  • Supports industry standard Ultra160 SCSI interface
  • Programmable multi-segmentable cache buffer (see Section 3.1)
  • 10,028 rpm spindle; average latency = 2.99 ms
  • Command queuing of up to 64 commands
  • Background processing of queue
  • Supports start and stop commands (spindle stops spinning)
    • Performance characteristics
    Formatted capacity 18.352 GB (formatted, rounded off values)
    Read/write heads 2
    Bytes per track 348,900 bytes (average, rounded off values)
    Bytes per surface 12,183 MB(unformatted, rounded off values)
    Tracks per surface (total) 26,302 tracks (user accessible)
    Tracks per inch 38,000 tpi
    Peak bits per inch 460.00 KBpi
    Internal data rate 530-674 Mbps (variable with zone)
    Disc rotational speed 10,028 rpm (+0.5%)
    Average rotational latency 2.99 ms
    Access time
                        Including controller overhead without disconnect Not including controller overhead without disconnect
                        Drive level Drive level
      Read Write Read Write
    Average typical ms 5.4 6.4 5.2 6.2
    Single track typical ms 0.7 1.1 0.5 0.9
    Full stroke typical ms 10.2 11.2 10.0 11.0
    Power +5 VDC ±5%, +12 VDC ±5%
    Environmental characteristics Operating Non-operating
    Relative humidity 5 to 95% non-condensing 5 to 95% non-condensing
    Ambient temperature 5 to 55° C –40 to 70° C
    Effective altitude –1,000 to 10,000 feet –1,000 to 40,000 feet
    Dimensions
    Height 1.00 inches (25.4 mm)
    Width 4.00 inches (101.6 mm)
    Depth 5.75 inches (146.05 mm)
    Weight 1.76 lbs. (0.798 kg)
    Reliability
  • 1,200,000 hour MTBF
  • LSI circuitry
  • Balanced low mass rotary voice coil actuator
  • Incorporates industry-standard Self-Monitoring, Analysis and Reporting Technology