Method to generate pattern data over garbage data when encryption parameters are changed

A memory device, comprising:

• at least one memory location configured to store information representing data written using a first encryption/decryption method;
• a read channel configured to read and decrypt information using a second encryption/decryption technique;
• and
• an apparatus configured to, in response to an indication that the information was written to the at least one memory location using the first encryption/decryption method, prevent the read channel from reading the at least one memory location using the second encryption/decryption method, wherein the apparatus includes a device for writing a predefined or custom code to the at least one memory location written in response to the read channel using the second encryption/decryption method.

A storage apparatus, comprising:

• a storage medium including a plurality of memory locations;
• a write channel configured to write information representing data to the plurality of memory locations;
• a read channel configured to read information representing data from the plurality of memory locations;
• a controller configured to:
• control the write channel to write information to the plurality of memory locations;
• control the read channel to read information representing data from the plurality of memory locations;
• in response to an indication that the write channel wrote information to at least one memory location of the plurality of memory locations using a first encryption/decryption method, prevent the read channel from reading the at least one memory location using a second, different encryption/decryption method;
• and
• cause the write channel to write the respective physical block address with a predefined or custom code in response to a change in the encryption/decryption method from the first encryption/decryption method to the second, different encryption/decryption method.