Capacity	250 Gb
The HDD capacity in Gigabytes indicates how much information can be stored by the HDD. The capacity of the HDD is fixed and cannot be increased after buying the HDD. Therefore, upon buying the HDD you should verify its compliance with your current volume requirements and provides a reserve for future needs.
Data Interface	SATA II
The connection of the HDD to the computer. The current industry standard is SATA connection. IDE connection is available with older computers. Prior to buying the HDD you should verify whether the motherboard has a free connection slot and the support for the chosen disc capacity.
Spindle rotation speed	7200rpm
The HDD rotations. The HDDs of most desktop computers have 7200rpm and this has already become the industry standard. If you want to achieve a higher speed you should buy the HDD of 10000rpm. The operation noise, temperature and power consumption of 10000rpm HDDs are much higher than these of the 7200rpm HDDs parameters, therefore, prior to buying a 10000rpm HDD you should verify the compliance of the enclosure, power supply unit and the cooling with the technical requirements of this HDD.
Data buffer	64MB
Data buffer is a high-speed memory built-in the HDD and allowing the disc to receive data at a smooth speed irrespective of the level of loading the physical memory of the disc at the particular time. If you work with a high number of small volume files (documents, photos, etc.) we recommend to buy an HDD with 8Mb or higher data buffer.

Name - WD RE4 250GB SATA 3Gb/s 7200 RPM internal 3,5inch Enterprise HDD 64Mb Cache RoHS compliant Bulk 24x7
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Manufacturer - WESTERN DIGITAL
Manufacturer Part No - WD2503ABYX
Description - WD RE4 enterprise SATA hard drives combine 64 MB cache with a SATA 3 GB/s transfer rate and dual stage actuation for lightning-fast performance in demanding server and storage applications. Technologically advanced acoustics minimize noise. Cool drive operation and enhanced reliability features help protect the drive and the data stored on it.
Feature - Dual actuator technology
Feature - Dual processor
Feature - StableTrac
Feature - IntelliSeek
Feature - Multi-axis shock sensor
Feature - RAID-specific, time-limited error recovery (TLER)
Feature - Third generation dynamic fly height
Feature - Thermal extended burn-in test
Feature - NoTouch ramp load technology
Feature - Active Power Save
Product Description - WD RE4 WD2503ABYX - hard drive - 250 GB - SATA-300
Type - Hard drive - internal
Capacity - 250 GB
Form Factor - 3.5" x 1/3H
Interface - Serial ATA-300
Data Transfer Rate - 300 MBps
Buffer Size - 64 MB
Spindle Speed - 7200 rpm
Features - Shock sensor, Rotary Acceleration Feed Forward (RAFF), Time-Limited Error Recovery (TLER), dual actuator technology, IntelliSeek, StableTrac, Perpendicular Magnetic Recording (PMR), Active Power Save, NoTouch ramp load technology, dual processor , S.M.A.R.T.
Dimensions (WxDxH) - 10.2 cm x 14.7 cm x 2.6 cm
Weight - 450 g
Manufacturer Warranty - 5 years warranty
Description - <p>Enterprise Hard Drives<br /> 250 GB, 1.2 million hours MTBF, 64 MB Cache, 7200 RPM<br /> Fast, reliable and enterprise-ready.<br /> High-capacity, high-performance enterprise SATA drives with 24x7 reliability for business-critical applications.&nbsp; <br /> &nbsp;</p>
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Vendor Homepage - http://www.wdc.com/en/products/products.asp?driveid=831
Capacity GB - 250
HDD Capacity - 250GB
SATA Interface - Yes
Buffer memory size MB - 64
Rotation speed rpm - 7200
Bytes per Sector Bytes/sector - 512
Discs/Heads - 1/1
Average Seek ms - 14
Form Factor - 3,5"
Brown box quantity - 20
Unit Brutto Volume cubm - 0.0013892
Unit Net Weight kg - 0.45
Unit Gross Weight kg - 0.5
Warranty - 60 months
ProductCode - WD2503ABYX
Vendor - WESTERN DIGITAL
ProductType - HDD Server
ProductCategory - Cietie diski
ProductDescription - HDD Server WESTERN DIGITAL RE4 (3.5", 250GB, 64MB, SATA II-300, 7200 rpm)
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Device Location - Internal
Form Factor - 3.5"
Storage Capacity - 250 GB
Supports Data Channel - SATA II-300
Installed Cache Memory Storage Capacity - 64 MB
Sector Capacity - 512 B
Cylinders Quantity - 1
Heads Quantity - 1
Rotational Speed - 7200 rpm
Average Rotational Delay - 4.2 ms
External Data Bit Rate - 3000 Mbps
Non-Recoverable Errors - 1 per 10^15
Start / Stop Cycles - 600000
Hard Drive Features - Rotary Acceleration Feed Forward
SATA Interface Quantity - 1
SATA Interface Connector Type - SATA 7-pin
Maximum Operating Ambient Temperature - 55 °C
Minimum Operating Ambient Temperature - 5 °C
Maximum Non-Operating Ambient Temperature - 70 °C
Minimum Non-Operating Ambient Temperature - -40 °C
Maximum Power Consumption - 7.9 W
Minimum Power Consumption - 0.7 W
Shock Tolerance Operating - 65G @ 2ms
Shock Tolerance Storage - 350G @ 2ms
Typical Operating Noise Level - 27 dB
Depth - 147 mm
Height - 25.4 mm
Width - 101.6 mm
Nominal Weight - 0.73 kg
Package Type - Retail
Warranty Products returnable - Yes
Warranty Term (month) - 60 month
Warranty validation Criteria - Serial Number
Pieces in pack - 1
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Manufacturer - WESTERN DIGITAL
Manufacturer's part No. - WD2503ABYX
Item Number - 1596051
EAN-Code - 718037763132
Intake -
Manufacturer's warranty - 60 Months Bring-In Warranty
min. order: - 1
Additional VPE - 20 ST.800 S
Product name - WD RE4 250GB SATA 3Gb/s 7200 RPM internal 3,5inch Enterprise HDD 64Mb Cache RoHS compliant Bulk 24x7
Description - WD RE4 WD2503ABYX - Hard drive - 250 GB - internal - 3.5" - SATA-300 - 7200 rpm - buffer: 64 MB
EAN-Code - 718037763132
Device Type - Hard drive - internal
Capacity - 250 GB
Form Factor - 3.5" x 1/3H
Interface - Serial ATA-300
Buffer Size - 64 MB
Bytes per Sector - 512
Features - Shock sensor, Rotary Acceleration Feed Forward (RAFF), Time-Limited Error Recovery (TLER), dual actuator technology, IntelliSeek, StableTrac, Perpendicular Magnetic Recording (PMR), Active Power Save, NoTouch ramp load technology, dual processor , S.M.A.R.T.
Width - 10.2 cm
Depth - 14.7 cm
Height - 2.6 cm
Weight - 450 g
Drive Transfer Rate - 300 MBps (external)
Internal Data Rate - 128 MBps
Average Latency - 4.2 ms
Spindle Speed - 7200 rpm
Non-Recoverable Errors - 1 per 10^15
Start / Stop Cycles - 600,000
Interfaces - 1 x Serial ATA-300 - 7 pin Serial ATA
Compatible Bays - 1 x internal - 3.5" x 1/3H
Compliant Standards - RoHS
Service & Support - 5 years warranty
Service & Support Details - Limited warranty - 5 years
Min Operating Temperature - 5 °C
Max Operating Temperature - 55 °C
Shock Tolerance - 65 g @ 2ms (operating) / 350 g @ 2ms (non-operating)