Storage control system with data management mechanism and method of operation thereof

A method of operation of a storage control system comprising:

• generating encoded data having a proportional data distribution for writing to a memory device;
• identifying a marginal block based on a block error when an erase block is read from the memory device;
• generating a marginal tag for the marginal block, the marginal tag having a non-proportional data distribution different from the proportional data distribution;
• storing the marginal tag in data pages of the marginal block;
• and
• upon reading a data page in which the marginal tag has been stored, detecting that the data page has a non-proportional data distribution different from the proportional data distribution, and detecting that the data page is unusable and located in the marginal block in accordance with said detection of the non-proportional data distribution.

A storage control system comprising:

• a data generation module for generating encoded data having a proportional data distribution for writing to a memory device;
• a block identification module for identifying a marginal block when an erase block is read from the memory device;
• a tag generation module for;
• generating a marginal tag for the marginal block, the marginal tag having a non-proportional data distribution different from the proportional data distribution;
• storing the marginal tag in data pages of the marginal block;
• and
• a tag detection module for detecting, after the storage control system reads a data page in which the marginal tag has been stored, that the data page has a non-proportional data distribution different from the proportional data distribution, and detecting that the data page is unusable and located in the marginal block in accordance with said detection of the non-proportional data distribution.