Best option to "solve the clicking problem" if to figure out what´s wrong.
Open the drive in your clean room, take out heads and inspect them under your microscope.
To disable a head without knowing its state, could easily damage media, so fix the problem first and change heads.
If data is not worth a set of heads and client wants to go for a partial recovery, then cut or bend the bad head if necessary.
Change headmap in RAM to get the drive running and image the good heads by headmap.
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Digitalsupport Data Recovery
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