DB35.3 Series™ SATA 3Gb/s 250-GB Hard Drive The Seagate® DB35.3 Series™ hard drive features perpendicular recording technology for maximum capacity and reliability. Designed specifically for use in DVRs, these drives deliver the performance, power efficiency and reliability DVR manufacturers need to design superior products. Key Features and Benefits 8-MB cache Multiple stream recording capability—up to 10 television streams at once Operating acoustics as low as 2.7 bels for near-silent operation Unmatched reliability for extended system field life 5-year warranty Applications Digital video recorders (DVRs) Home media servers Specifications 250 GB Model Number ST3250820SCE Interface SATA 3.0Gb/s Cache 8 MBytes Capacity 250 GB Guaranteed Sectors 488,397,168 Number of pins on the I/O connector 22 PHYSICAL Height (max) 26.1 mm (1.028 inches) Width (max) 101.6 mm (4.010 inches) Length (max) 146.99 mm (5.787 inches) Weight (typical) 580 grams (1.28 pounds) COMPLIANCE European Union Restriction of Hazardous Substances Y PERFORMANCE Spindle Speed 7200 rpm Native Command Queuing 22 Sustained data transfer rate 72 Mbytes/sec. Average latency 4.16 msec Random read seek time <11.0 msec Random write seek time <12.0 msec Maximum interface transfer rate 300 Mbytes/sec. RELIABILITY Annual Failure Rate 0.68 % Unrecoverable read errors 1 in 10^14 POWER Average idle current 9.30 watts Average seek power 9.40 watts Standby power 0.80 watts Sleep power 0.807 watts Maximum start current, DC 2.00 amps ENVIRONMENT Ambient Temperature Operating 0 to 60 degrees C Nonoperating -40 to 70 degrees C Maximum operating temperature change 20 degrees C per hour Maximum nonoperating temperature change 30 degrees C per hour Maximum operating case temperature 75 degrees C Relative Humidity Operating 5 to 90 Nonoperating 5 to 95 Maximum allowable humidity change 30 per hour Altitude Operating altitude (min) -60.96 meters (-200 feet) Operating altitude (max) 3,048 meters (10,000 feet) Nonoperating altitude (min) -60.96 meters (-200 feet) Nonoperating altitude (max) 12,192 meters (40,000 feet) Shock Operating Shock (max) 63 Gs at 2 msec Nonoperating Shock (max) 350 Gs at 2 msec Vibration Operating vibration 0.25 Gs at5-22 Hz Operating vibration 0.50 Gs at 22-350 Hz Operating vibration 0.25 Gs at 350-500 Hz Nonoperating vibration 0.25 Gs at 5-22 Hz Nonoperating vibration 5.0 Gs at 22-350 Hz Nonoperating vibration 1.0 Gs at 350-500 Hz ACOUSTICS Acoustics (Idle Volume) 2.5 bels Acoustics (Seek Volume) 2.8 bels