Drive:
Maxtor Diamond Max Plus 9 (6Y080L0 series)
Controller
Board: Multi-layer Calypso III, 7200rpm
Symptoms
of Failure: Drive Dead
The Maxtor
Diamond Max Plus 9 is a very popular drive that is subject to
all the usual types of hard disk failure. In this example the
primary cause of the failure was electronic.
The power
to this drive is 3 phase & oxidation is a common cause of
losing a phase. Loss of one or more phases will (in most conditions)
cause the MOSFET to fail. This in turn will cause the "combo"
chip to fail and secondary damage will also be sustained to (a)
the board (b) further electronic components surrounding the MOSFET
and "combo" chip (c) the read / write head chip. Electrical
damage is not limited to the controller board as the read / write
chip is located on the head assembly and to reach it requires
the drive to be stripped down in a clean room.
Please note that all modern
hard disk drives are manufactured to very high standards, fail
infrequently and have very similar rates of reliability.
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