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

A memory device comprising:

• a 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 write a predefined or custom code to the memory location written in response to the read channel using the second encryption/decryption method.

A method comprising:

• writing information representing data to a plurality of memory locations of a memory device;
• reading information representing data from the plurality of memory locations;
• determining that information was written to a first memory location of the plurality of memory locations using a first encryption/decryption method;
• and
• preventing reading the first memory location using a second encryption/decryption method different from the first encryption/decryption method.