AS400 Facilities Cutover Readiness Checklist

Facilities Can Delay A Good Hardware Plan

An IBM Power refresh can be technically sound and still stall because the room is not ready. The deeper intent step after checking AS400 power requirements is assigning facilities sign-off before the cutover date is committed.

This matters most when an older AS/400 or iSeries environment is being replaced with a configuration that changes the room requirements.

• Rack depth
• Power supply behavior
• UPS load
• Adapter cabling
• Storage
• Service clearance

Confirm The Final Configuration

Facilities review should use the final quote, not a marketing model page. If the final configuration changes after review, the facilities checklist should be repeated. That prevents a last-minute surprise where the server fits the workload but not the room.

• Installed processor
• Memory
• Storage drawers
• Tape devices
• Network adapters
• HMC
• Rack kit
• Power supply configuration

Power And UPS Sign-Off

Power review should identify the electrical and shutdown assumptions before hardware arrives. Redundant power supplies should map to meaningful power separation, not just two cords plugged into the same weak path.

UPS runtime should be tested against the actual shutdown or failover procedure. Rated runtime is not the same as verified operational readiness.

• Circuit capacity
• Receptacle type
• Redundant feed design
• PDU load
• UPS capacity
• Expected runtime
• Shutdown or failover procedure

Pick The Install Target

Facilities sign-off gets cleaner when the team names the install target instead of arguing over individual parts. A basic install may be enough for a known workload in a stable room. A sustainable install is better when the workload matters and the business wants cleaner monitoring, tested runtime, and fewer surprises. A growth install makes sense when the server room is already being changed and the buyer expects more Power, storage, HA, or network gear later.

This is where AS400 power requirements becomes useful as a buyer question. It helps the team separate what gets the system running from what makes the install worth trusting for the next few years.

• Basic: make the exact system safe to install and shut down cleanly
• Sustainable: add measured load, UPS battery testing, monitoring, cooling margin, and documented feed separation
• Growth: reserve rack, circuit, PDU, cooling, and runtime headroom before the next hardware decision arrives

Rack And Console Readiness

The rack plan should confirm serviceability before the equipment is scheduled. Cooling review should consider heat load and airflow, especially when storage or tape hardware is being added.

Console and HMC access should be checked before cutover. A server that is physically installed but hard to manage is not ready.

• Depth
• Rails
• Weight rating
• Cable path
• Rear clearance
• Front access
• Floor loading
• Serviceability

Cutover Readiness Sign-Off

The final readiness review should include everyone who owns a cutover risk. That sign-off does not make the project larger. It prevents the avoidable facilities issue from becoming the reason the project misses its window.

• IT
• Facilities
• Reseller or installer
• Business owner
• Room readiness
• Hardware readiness
• Migration readiness
• Operational fallback

Frequently Asked Questions

Who should sign off on AS400 facilities readiness?

At minimum, the people who own the room and workload should sign off.

• IT
• Facilities or data center staff
• Installer or reseller
• Workload owner
• Rack
• Power
• Cooling
• Cabling
• Console access
• Cutover timing

Should facilities readiness be checked before or after the quote?

Check it after the final configuration is known but before hardware ships or the cutover window is committed. A generic model estimate is not enough for facilities sign-off.

What is the difference between a basic and growth-ready AS400 install?

A basic install is sized for the known machine and safe shutdown. A growth-ready install reserves power, UPS runtime, PDU capacity, rack space, cooling, and service clearance for future IBM Power, storage, network, or HA equipment.

Related Resources

• AS400 Power Requirements by Model
• Rack-Mount UPS and PDU Bundle
• Glossary: AS400 Power Requirements

Sources

• IBM Power product family