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IBM System Storage N series Hardware Guide by Marco Schwarz, Tom Provost, Steven Pemberton, Dirk Peitzmann, Jeff Lin, Roland Tretau

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Disk sanitization
This chapter addresses disk sanitization and the process of physically removing data from a disk. This process involves overwriting patterns on the disk in a manner that precludes the recovery of that data by any known recovery methods.
It also presents the Data ONTAP disk sanitization feature and briefly addresses data confidentiality, technology drivers, costs and risks, and the sanitizing operation.
This chapter includes the following sections:

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