WD drives store logical-to-physical mapping in RAM and SA. Corruption leads to "DRDY UNC" errors or capacity showing as 0GB. Trex 2 commands like TR (translator rebuild) or RT (rebuild translator) can regenerate the mapping from the primary defect list (PDL) and secondary defect list (SDL).
Features
However, there are also limitations to consider: wd hdd pro repair trex 2
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