Western Digital WD2500AAKS CAVIAR SE16/ SATAII/ 250GB/ 7200RPM/ 160GB per platter

WD Caviar® Blue™
250 GB, 3 Gb/s, 16 MB Cache, 7200 RPM
With SATA and EIDE interfaces, cache sizes ranging from 2 MB to 16 MB, WD Caviar Blue drives offer a full range of performance features. Pick the drive that suits your needs with the confidence in knowing that all WD Caviar Blue drives are built to the highest standards of quality and reliability.
Interface:
SATA 3 Gb/s EIDE 100 MB/s
Cache Size:
16 MB 8 MB 2 MB
Capacities:
750 GB 640 GB 500 GB 400 GB 320 GB 250 GB 160 GB 80 GB 40 GB
Model: WD2500AAKS
Overview
To make drive selection simple, we've gathered all our popular WD Caviar SE16, WD Caviar SE, and WD Caviar drives under one umbrella we call WD Caviar Blue. Built to Western Digital's awarding winning quality standards, these drives are available in a full range of performance features.
Key Features
Interface
EIDE - Enhanced integrated drive electronics (EIDE), also called Parallel ATA (PATA), hard drives have been the standard in the computer industry for more than 10 years.
SATA - Serial ATA (SATA) hard drives are quickly becoming the new standard. Motherboard manufacturers now include SATA inputs on their boards. Because of their considerably narrower cables, SATA hard drives provide increased airflow and less clutter and in the computer system compared to EIDE drives.
The performance difference - EIDE drives support data transfer rates up to 100MB/sec, and all WD Caviar Blue SATA drive support 3 Gb/s transfer rates.
How to choose - Our handy Interface Guide [link] can help you make your selection.
Cache - WD Caviar Blue is available in 2 MB, 8 MB, and 16 MB cache sizes. Bigger cache memory yields faster performance.
Capacity - We offer drives ranging from 40 GB to 750 GB. Pick the biggest capacity your budget will allow. You can never have too much storage space.
Reliability - We understand the importance of your data, and we are committed to protecting that data with exceptionally reliable products, advanced data protection technology and superior customer support.
Cool - Keeping the drive cool enhances reliability. WD continues to develop new and innovative ways to keep drives cool while they are operating.
Quiet - The technology that Tom's Hardware Guide called "very fast and nearly silent" is used throughout this family of drives. Our WhisperDrive™ technology minimizes noise to levels near the threshold of human hearing. To cut seek noise, SoftSeek™ technology streamlines read/write seeking algorithms, resulting in more efficient operation.
NoTouch™ ramp load technology - The recording head never touches the disk media ensuring significantly less wear to the recording head and media as well as better drive protection in transit. (Available on 120 GB capacities and above)
IntelliSeek™ - Calculates optimum seek speeds to lower power consumption, noise and vibration. (Available on 120 GB capacities and above) [View demo]
Compatible - We perform tests on hundreds of systems and a multitude of platforms in our FIT Lab™ and Mobile Compatibility Lab to give our customers confidence that our drives will work in their systems.
Ideal For
Family and business computing
How this WD hard drive protects your data
* Data Lifeguard™ is an exclusive set of data protection features, including shock protection, an environmental protection system and real-time embedded error detection and repair. WD's Data Lifeguard technology automatically finds, isolates, and repairs problems that may develop over the life of a hard drive.
* Data Lifeguard Tools™ are software utilities designed for WD hard drives that work with the embedded Data Lifeguard features to make hard drive installation,diagnostics and repair both simple and worry-free. (Download Data Lifeguard Tools)
* ShockGuard™ instantaneously protects the hard drive against damage from bumps and vibrations while it is running. This technology enables WD Caviar drives to achieve industry-leading shock specifications.
Important interface information
This drive requires a SATA interface
Specifications
Performance Specifications
Transfer Rates
Buffer To Host (Serial ATA) 3 Gb/s (Max)
Physical Specifications
Formatted Capacity 250,059 MB
Capacity 250 GB
Interface SATA 3 Gb/s
User Sectors Per Drive 488,397,168
Physical Dimensions
English
Height 1.028 Inches (Max)
Length 5.787 Inches (Max)
Width 4.00 Inches (+/- 0.010 inch)
Weight 1.33 Pounds
Metric
Height 25.4 mm (Max)
Length 147 mm (Max)
Width 101.6 mm
Weight 0.60 kg
Environmental Specifications
Shock
Operating Shock (Read) 65G, 2 ms
Non-operating Shock 350G, 2 ms
Acoustics
Idle Mode 25 dBA (average)
Seek Mode 0 29 dBA (average)
Seek Mode 3 26 dBA (average)
Temperature (English)
Operating 32° F to 140° F
Non-operating -40° F to 149° F
Temperature (Metric)
Operating -0° C to 60° C
Non-operating -40° C to 65° C
Humidity
Operating 5-95% RH non-condensing
Non-operating 5-95% RH non-condensing
Altitude (English)
Operating -1,000 feet to 10,000 feet
Non-operating -1,000 feet to 40,000 feet
Altitude (Metric)
Operating -305M to 3,050M
Non-operating -305M to 12,200M
Vibration
Operating
Linear 20-300 Hz, 0.75 G (0 to peak)
Random 7-500 Hz (0.00221 g² / Hz)
Non-operating
Low Frequency 10-300 Hz, 0.195 inches (double amplitude)
High Frequency 300-500 Hz, 5.0G (0 to peak)
Electrical Specifications
Current Requirements
12 VDC
Read/Write 395 mA
Idle 380 mA
Standby 6 mA
Sleep 6 mA
5 VDC
Read/Write 660 mA
Idle 532 mA
Standby 180 mA
Sleep 180 mA
Power Dissipation
Read/Write 7.80 Watts
Idle 7.20 Watts
Standby 0.97 Watts
Sleep 0.97 Watts