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Amazon.com: Western Digital Caviar Blue 640 GB Bulk/OEM Hard Drive 3.5 Inch, 16 MB Cache, 7200 RPM SATA II WD6400AAKS: Electronics
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Used - Very Good: Western Digital Blue WD6400AAKS 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive - Newegg.com
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WDC6400BPVT - Western Digital Scorpio Blue 640GB 5400RPM SATA 3GB/s 8MB Cache 2.5-inch Hard Disk Drive
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Western Digital Scorpio Blue WD6400BPVT 640GB 5400 RPM 8MB Cache 2.5" SATA 3.0Gb/s Internal Notebook Hard Drive - w/1 Year Warranty
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Western Digital Scorpio Blue WD6400BEVT 640GB 5400 RPM 8MB Cache SATA 3.0Gb/s 2.5" Internal Notebook Hard Drive Bare Drive - Newegg.com
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WD6400AACS-00G8B0 - Western Digital Caviar Blue 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
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WD6400AAKS-22A7B2 - Western Digital Caviar Blue 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
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Used - Very Good: Western Digital Blue WD6400AAKS 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive - Newegg.com
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