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Western Digital hard drives are now more and more widely used.  It’s very necessary for us to learn How to identify different types of western Digital and then we can have a higher success rate of wd data recovery.  Silver I, Silver II, Black I, Black II, Royl  types are supported by HD Doctor for WD now. They are identified by their PCBs.

Silver I Series


The capacity is less than 40G
5400 RPM

Silver II Series


The capacity is usually from 40G to 120G
7200 RPM

Black I Series


7200 RPM
Disable Zones, SA L-format and Read-only test functions are not supported.

Black II Series


The drive with a common PCB belongs to Black II Series
Royl Series


The capacity is from 40G to 750G.
Disable Zones,SA L-format,Module deflection and Read-only test functions are not supported.

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