Just formatted and thoroughly tested this hard drive. No problems at all. It's still under warranty and runs great, whisper quiet too. The hard drive was manufactured in Malaysia on 24 December 2005. You can look up the warranty info

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WMAP41014917 WD1500ADFD-00NLR0 In Limited Warranty 1/25/2011 Upgrade

Number of drives eligible for Replacement: 1

Number of drives ineligible for Replacement: 0

I probably don't need to tell you about this hard drive since it's so popular, but here's the specs anyway:

Model Brand Western Digital Series Raptor Model WD1500ADFD Performance Interface SATA 1.5Gb/s Capacity 150GB RPM 10000 RPM Cache 16MB Average Seek Time 4.6ms Average Write Time 5.2ms Average Latency 2.99ms Physical Spec Form Factor 3.5" Features Features Reliable
Designed and manufactured to enterprise-class standards to provide enterprise reliability in high duty cycle environments. With 1.2 million hours MTBF, these drives have the highest available reliability rating on a high capacity drive.
Fast
With a next-generation SATA interface, 1.5 Gb/s data transfer rate, native command queuing (NCQ), and 16 MB cache, these drives deliver optimum performance.
RAID-specific, time-limited error recovery (TLER)
A feature unique to WD, prevents drive fallout caused by the extended hard drive error-recovery processes common to desktop drives.
Rotary Acceleration Feed Forward
Optimizes operation and performance when the drives are used in vibration-prone, multidrive systems such as rack-mounted servers or network storage.
FlexPower
Connector technology that accepts power from either industry standard or new SATA power supplies. Manufacturer Warranty Parts 5 years limited Labor 5 years limited