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Recently I purchased two WD Pro NAS harddrives, each with capacity of 18 Tb. They were purchased to install existing WD 6TB ones. After I installed both of them, one of them would not initiate and generate error (model WD181KFGX-3PCKWN0 aka WD181KFGX-68CKWN0 ). NAS is Synology, with the latest software installed (DSM 7.0.1-42218, Model DS-920+). I swapped the two hard drivers and the faulty one still generates the same error. Both hardrives have the same Firmware version 83.00A83
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