During March 2025, Codpdms developed a disk controller scheduling optimization feature for the SSAFYnity/Job-Preparation-Challenge-5th repository. The work focused on improving disk I/O performance by implementing arrival-based sorting and shortest-job-first processing, which together reduced overall waiting time and increased throughput. Using Python and applying knowledge of algorithms and data structures, Codpdms designed a solution that prioritized efficient resource utilization and reliability. No major bugs were addressed during this period, as the primary goal was to enhance performance. The depth of the work reflects a strong grasp of problem solving and practical application of scheduling techniques in system optimization.