X-2UB-1TB – Data Domain 1TB 7200 RPM SATA 3.5″ HDD for DD610, DD620, DD630 12 bay base – Disk Drive Finder
Amazon.com: Western Digital(WD) BLUE Deskptop 1TB( 1Terabyte) 3.5"Hard Disk Drive, 5400~7200RPM, SATA3 ( 6.0GB/s), 64MB Cache, IDEAL for PC/Mac/CCTV/NAS/DVR/Raid and SATA Applications, 1YR Warranty (Blue) : Electronics