I few weeks ago I purchased a 3.5" WD Green 1TB SATA300 Internal Hard Drive. I placed this new hard drive in my Rosewill Dock and (1) performed a "zero-write" to all hard drive sectors, (2) partitioned the hard drive as one Logical Primary ntfs partition and (3) performed a Full Format. The Partitioning and Formatting were done using Windows Disk Management (Windows XP Pro SP3 32 bit). I decided to use this hard drive as an internal backup drive in one of my PC's. I installed the hard drive in that PC. On first PC start with the newly installed hard drive, Windows (Windows XP Pro SP3 32 bit) insisted on doing a chkdsk on that drive. The chkdsk operation took around 4 hours to complete. Why would transferring this hard drive from an external USB 2.0 hard drive dock to an internal hard drive position cause a Windows chkdsk operation to be triggered? Thanks in Advance.