PCB boards

by mchainmchain - 6/17/13 2:50 AM

In Reply to: Update by ateh21

are specific to the drive it is installed in. Variations in PCB board depend on the time of manufacture, specification changes made to firmware by vendor, etc,.

For this PCB board change-out to work, you need the same PCB board type as the defective drive.

PCB:
WC REV 6
20130223 (Date of manufacture)
U3B 2J2K (Vendor internal lot and specification)

PCB:
WC REV 6
20130407
M7A 4508

Notice the difference? A little known fact about HDD's is one way to destroy drive access to a drive you do not want to have others get access with data still on it without wiping the drive first, is to remove and throw away the PCB board. Now, if the drive is found by another, then they must find the exact same replacement PCB board and install that to bring it back to life. PCB boards are not interchangeable as one might otherwise think.