Protecting against unauthorized firmware updates using induced servo errors
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United States of America Patent
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Feb 20, 2018
Issued Date -
N/A
app pub date -
Oct 11, 2016
filing date -
Oct 11, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
Method and apparatus for data security in a data storage device. In some embodiments, a first version of firmware is installed in a memory of the device. The firmware is used by a programmable processor to control accesses to a rotatable data recording medium on which is written pre-recorded servo positioning data used to position a data transducer. A newer, second version of the firmwave is subsequently installed in the memory to replace the first version of firmware. The second version of the firmware includes an instruction to corrupt a selected portion of the servo positioning data on the medium in order to authenticate the second version of the firmware. During a subsequent initialization of the device, host access is granted based on detection of the corruption of the selected portion of the servo positioning data.
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