Colombia's largest bank adds an independent expert eye to its core banking move to IBM Power10

When Redsis came on board, the migration was already approved and well underway, roughly 70% complete. The program's goal was to land the core on Power10 with 54% more compute capacity, and 20 partitions had already been migrated to Power10 as a precedent. What remained was the most sensitive piece: the core banking partition itself.

• More than compute: the move included IBM storage dependencies, SAN, multipathing, zoning and replication to the disaster recovery (DR) site.
• Tight timeline: the engagement had to deliver value within a single calendar month, on a project already in flight.
• Independent judgment: the overseer needed to weigh in with technical rigor without stepping into the contractor's or the bank's role.
• High-stakes decisions: every core cutover window needed enough evidence for an informed go/no-go.

Redsis assembled a team of four specialist profiles, working remotely and in a hybrid model, with on-site presence at critical milestones. The engagement ran over four weeks, each with defined deliverables:

• Week 1 · Kickoff: kickoff minutes, work plan, requested-and-received information log, initial risk register and agreement on the technical reference criteria.
• Week 2 · Review and baseline: analysis of the migration, cutover and rollback plans, acceptance criteria, tests already executed and lessons learned from earlier progress.
• Week 3 · Active monitoring: review of test evidence, formal alerts on critical risks and a technical readiness opinion for the cutover window.
• Week 4 · Window and close-out: a conformity opinion on the cutover window (when executed within the month), final report, final risk and findings register, and closing recommendations.

What the technical review covered

• Logical partitioning and virtualization of the core IBM i partition on the target Power10 server.
• Storage, SAN, multipathing and zoning tied to the partition's environment.
• Core data replication between the primary site and the DR site.
• Cutover and rollback plans, test strategy and acceptance criteria.
• Post-migration stabilization and application of lessons learned.

With more than 25 years delivering mission-critical infrastructure to Latin American banks, and as an IBM Platinum Partner, Redsis knows IBM Power and IBM i from the inside: we have sized, installed, migrated and supported them for financial institutions across the region. That hands-on experience is what lets our specialists read a cutover plan, spot a gap in the evidence and turn it into a concrete recommendation.