005051838 – Data Domain 4TB 7200 RPM SAS 3.5″ HDD for DD6300, DD6800, DD9300 12 bay enclosures – Disk Drive Finder
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TOSHIBA MD04ACA400 4TB 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Desktop Internal Hard Drives - Newegg.com