Swapping a physical block of a virtual block based on a bit error rate of the physical block

A system comprising:

• a controller configured to:
• select a first physical block, of a virtual block (VB), for a host write operation or a garbage collection operation,
• wherein the first physical block previously stored user data;
• determine that an average bit error rate (BER) of the first physical block exceeds an average BER of the VB;
• and
• based on determining that the average BER of the first physical block exceeds the average BER of the VB:
• swap, for the VB, the first physical block with a second physical block;
• or
• cause a program time, of the first physical block, to be increased.

A non-transitory computer-readable medium storing a set of instructions, the set of instructions comprising:

• one or more instructions that, when executed by one or more processors of a controller, cause the controller to:
• determine that an average bit error rate (BER) of a user physical block, of a virtual block (VB), exceeds an average BER of the VB;
• and
• based on determining that the average BER of the physical block exceeds the average BER of the VB:
• swap, for the VB, the user physical block with a system physical block that is allocated for storing system data;
• swap, for the VB, the user physical block with a reserved physical block;
• or
• cause a program time, of the user physical block, to be increased.