What is a Recertified Drive? WD recertified products may consist of customer return units & may have been repaired. ALL recertified products are stringently tested & determined to meet WDs stringent quality standards before they are distributed for sale. Please note that some recertified items may not be cosmetically mint condition & may have scratches or marks What is the warranty on a recertified drive? Ebuyer will support all Recertified Hard Drives with a 90 day warranty MAX.500GB Formatted Capacity Per Disk Environment friendly product with Ro HS compliance Serial ATA 3.0 Gbps Interface Support enhanced performance with dual-ARM based firmware enhanced recording stability over temperature with PMR ATA S.M.A.R.T. Compliant Advanced dynamic FOD control for best data integrity ATA Automatic Acoustic Management Feature Intelligent compensation of external disturbance ATA 48-bit Address Feature SATA Native Command Queuing Feature ATA Device Configuration Overlay Feature Device Initiated SATA Power Management Noise Guard Rotational vibration sensor (Optional) Silent See