Western Digital Caviar SE SATA 250 GB Hard Drive

WD Caviar® SE Serial ATA 7200 RPM hard drives have the features and capacities ideal for next-generation computers and low-end enterprise storage. Users benefit from capacities up to 250 GB, 8 MB cache, a data transfer rate of 150 MB/s and improved cabling that enables greater system design flexibility.

Features

  • 8 MB cache buffer – fast data transfer from a cache.
  • 7200 RPM – high-performance rotational speed for high-capacity hard drives.
  • Fluid Dynamic Bearing (FDB) technology – improves hard drive reliability; reduces heat, vibration, and noise.
  • SecureConnect™– provides a 500 percent stronger cable-to-drive connection than first-generation SATA hard drives and cables. Also ensures backward compatibility with legacy SATA cables and backplanes.
  • FlexPower™ – connector technology that accepts power from both industry-standard and new SATA power supplies.
  • Point-to-point bus configuration – utilizes the full bandwidth of each drive interface in a networked environment.
  • Hot plug support – ability to swap out a hard drive without having to power down the system or reboot promotes system design flexibility, data availability, and serviceability.
  • Backplane compatibility – promotes expandability and flexibility in system architecture.
General
Rotational Speed 7,200 RPM (nominal)
Buffer Size 8 MB
Average Latency 4.20 ms (nominal)
Contact Start/Stop Cycles 50,000 minimum
Seek Times (Average)
Read Seek Time (Average) 8.9 ms
Write Seek Time (Average) 10.9 ms (average)
Track-To-Track Seek Time 2.0 ms (average)
Full Stroke Seek 21.0 ms (average)
Transfer Rates
Buffer To Host (Serial ATA) 1,200 Mbits/s (Max)
Buffer To Disk 748 Mbits/s (Max)
General
Number of Heads (Physical) 6
General
Formatted Capacity 250,059 MB
Capacity 250 GB
Interface SATA
Actuator Type Rotary Voice Coil
Number of Platters 3
Bytes Per Sector 512
User Sectors Per Drive 488,397,168
Servo Type Embedded
English
Height (English) 1.028 Inches (Max)
Length (English) 5.787 Inches (Max)
Width (English) 4.00 Inches (+/- 0.010 inch)
Weight (English) 1.60 Pounds (+/- .10 lb)
Metric
Height (Metric) 26.1 mm (Max)
Length (Metric) 147 mm (Max)
Width (Metric) 101.6 mm
Weight (Metric) 0.73 kg (+/- .082 kg)
Shock
Operating Shock (Read) 65G, 2 ms
Non-operating Shock 250G, 2 ms
Acoustics
Idle Mode 34 dBA (average)
Seek Mode 0 36 dBA (average)
Seek Mode 3 35 dBA (average)
Temperature (English)
Operating (English) 41° F to 131° F
Non-operating (English) -40° F to 149° F
Temperature (Metric)
Operating (Metric) 5° C to 55° C
Non-operating (Metric) -40° C to 65° C
Humidity
Operating 5-95% RH non-condensing
Non-operating 5-95% RH non-condensing
Altitude (English)
Operating (English) -1,000 feet to 10,000 feet
Non-operating (English) -1,000 feet to 40,000 feet
Altitude (Metric)
Operating (Metric) -305M to 3,050M
Non-operating (Metric) -305M to 12,200M
Vibration
Operating
Linear 20-300 Hz, 0.75G (0 to peak)
Random 10-300 Hz, 0.004 g2/Hz
Non-operating
Low Frequency 5-20 Hz, 0.195 inches (double amplitude)
High Frequency 10-300 Hz, 5.0G (0 to peak)
Current Requirements
12 VDC
Read/Write 450 mA
Idle 470 mA
Standby 23 mA
Sleep 23 mA
5 VDC
Read/Write 800 mA
Idle 750 mA
Standby 330 mA
Sleep 200 mA
Power Dissipation
Read/Write 12.80 Watts
Idle 9.50 Watts
Standby 1.90 Watts
Sleep 1.30 Watts