Specifications
Part Number: 5508951RSeagate 250 GB 7200 RPM Serial ATA II Hard Drive With PMR

Following are the specifications for the Seagate® 300 GB 15K.5 RPM SAS hard drive.
Specifications are subject to change without notice or obligation.

Feature Specification
General
Form Factor 3.5-inch (width)
1-inch (height)
Dimensions (H × W × L) 1.03 × 4.00 × 5.79 inches (26.1 × 101.6 mm × 146.99 mm)
Weight 1.28 lbs(0.58 kg)
Formatted Capacity 250.2 Gbytes
Performance
Transfer Rates
  • Internal: 1,030 Mbits/sec max.
  • Average formatted: 70 MBytes/sec
    		•
    Seek Times
  • Average read: 8.5 msec typical
  • Average write: 9.5 msec typical
  • Track-to-track read: 0.8 msec typical
  • Track-to-track write: 1 msec typical
    		•
    Average Latency 4.16 msec
    Buffer 16,384 Kbytes
    Spindle Speed 7200 RPM
    Spinup Time 15 sec
    Power-On to Ready Time 15 sec
    Configuration
    Number of Discs (Physical) 2
    Number of Heads (Physical) 3
    Bytes Per Sector 512
    Areal Density 114,400 Mbits/square inch
    Track Density (TPI) 145,000 tracks/inch
    Recording Density (BPI) 813,000 bits/inch, max.
    Recording Method Perpendicular
    Electrical Requirements
    Current
  • 12VDC ±10%
    • Typical: 0.52 amps
    • Startup: 2.8 amps
  • 5VDC ±5%
    • Typical: 0.611 amps
    • Startup: 0.772 amps
    • Power
  • Seek: 12.6 watts, typ.
  • Read/write: 13 watts, typ.
  • Idle: 9.3 watts, typ.
    		•
    Environmental
    Shock
  • Operating: 63 Gs for 2 msec, max.
  • Non-operating: 225 Gs for 2 msec, max.
    		•
    Temperature
  • Operating: 5° C to 55° C
  • Non-operating: -40° C to 70° C
    		•
    Temperature Change
  • Operating: 20° C/hr max.
  • Non-operating: 30° C/hr max.
    		•
    Humidity
  • Operating: 90%, max.
  • Non-operating: 95%, max.
    		•
    Operating Humidity Change 30% per hour, max.
    Operating Wet Bulb Temperature 37.7° C, max.
    Altitude
  • Operating: -60.9 m to 3,048 m
  • Non-operating: -200 m to 40,000 m
    		•
    Acoustics Idle (sound power, typ.): 2.5 Bels
    Reliability
    Mean Time Before Failure 1,200,000 hours
    Non-Recoverable Read Errors 1 per 1014 bits read
    Supports S.M.A.R.T. Yes