Zero-one balance management in a solid-state disk controller

A device, comprising:

• means for scrambling data to be written to a portion of a non-volatile memory to produce scrambled data having a known statistical average number of zero bits and a known statistical average number of one bits;
• means for writing the scrambled data to the portion of the non-volatile memory;
• means for subsequent to the writing, reading the portion of the non-volatile memory;
• means for computing a disparity between a number of zero bits and a number of one bits in data read from the portion of the non-volatile memory;
• and
• means for determining a threshold voltage for a subsequent read of the non-volatile memory based at least in part on the disparity.

A tangible computer readable medium having a set of instructions stored therein that when executed by a processing element cause the processing element to perform and/or control operations comprising:

• scrambling data to be written to a portion of a non-volatile memory to produce scrambled data having a known statistical average number of zero bits and a known statistical average number of one bits;
• writing the scrambled data to the portion of the non-volatile memory;
• subsequent to the writing, reading the portion of the non-volatile memory;
• computing a disparity between a number of zero bits and a number of one bits in data read from the portion of the non-volatile memory;
• and
• determining a threshold voltage for a subsequent read of the non-volatile memory based at least in part on the disparity.