The Tale of the Tape

Hard Drive Specifications
Seagate Barracuda 7200.11 1TB Western Digital Caviar GP 1TB
Manufacturer's Stated Capacity 1000.2GB (1 Terabyte) 1000.2GB (1 Terabyte)
Operating System Stated Capacity 931.5 GB 931.5 GB
Interface SATA 3Gb/s SATA 3Gb/s
Rotational Speed 7,200 RPM 5400-7200 RPM (variable)
Cache Size 32 MB 16 MB
Average Latency 4.16ms (nominal) 5.6ms (nominal)
Read Seek Time 8.9ms 8.9ms
Number of Heads 8 8
Number of Platters 4 4
Power Draw (Idle/Load) 8W/12.0W 4W/7.4 W
Command Queuing Native Command Queuing Native Command Queuing
Warranty 5 Years 3 Years

The specifications chart spells out the extent of the differences between the two drives. The Seagate drive runs at 7200RPM with a 32MB buffer. The Western Digital drive's IntelliPower algorithm, which varies the rotational speed between 5400RPM and 7200RPM, dictates the Western Digital's rotational speed. Despite this variable rotational speed, Western Digital specifies the same average seek time as Seagate. Western Digital lists this product as a desktop-class drive; it carries a three-year warranty, which falls short of the Seagate's five-year warranty. Western Digital's enterprise drive (RE2-GP) carries a five-year warranty and offers similar performance.

Index Test Setup


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