The As-Built & Handoff Package Every GPU Deployment Should Deliver

Rack-Level Asset Inventory

Every rack requires a complete asset list that records the serial number, part number, MAC addresses, and installed firmware for each GPU tray, NVLink switch tray, power shelf, and manifold. These values are captured during integration using barcode scanners tied to the deployment database rather than copied from shipping manifests.

The list must also include the physical rack U-position for every device and the corresponding label ID applied under TIA-606-C rules. Operators later use this data to populate DCIM systems and to confirm that replacement parts match the original configuration during maintenance.

Without this baseline, day-one troubleshooting cannot distinguish between a mis-cabled link and an incorrect or swapped component.

Scale-Out Network Test Documentation

All MPO trunk cables carrying the InfiniBand or Ethernet fabric between racks must be documented with insertion loss, return loss, and polarity results obtained from a calibrated MPO tester. Each trunk is tested after cleaning and inspection against IEC 61300-3-35 end-face criteria, and the test file is named with the trunk identifier from the as-built drawings.

Switch port mappings are recorded showing which rack uplink connects to which leaf or spine port. This mapping is verified by lighting the port LEDs or using LLDP before the handoff package is accepted.

NVLink connectivity inside the rack is verified separately through the copper backplane using the OEM diagnostic utilities; fiber test results are never presented as evidence of NVLink status.

Liquid Cooling and Power Validation Records

Cooling loop documentation includes measured flow rates, supply and return temperatures, and pressure differentials at each manifold connection, compared against the OEM-specified operating envelope. Any deviation outside tolerance requires a corrective action entry before the rack is released.

Power shelf commissioning records show input voltage, phase balance, and breaker coordination results plus the actual load drawn by the populated GPUs at staged power levels. These measurements confirm that the rack power distribution matches the design one-line diagram.

Both sets of records are timestamped and signed by the commissioning engineer so that subsequent thermal or electrical events can be correlated to the original baseline.

As-Built Drawings and Rack Elevations

As-built drawings update the original rack elevation to show the exact installed positions of every tray, switch, and manifold, including any field deviations approved during assembly. Cable routing paths for both copper NVLink spines and MPO trunks are shown with actual bend-radius compliance noted at each turn.

Elevation drawings are cross-referenced to the asset list so that a serial number can be located to a precise U-position without opening the rack doors. Separate sheets detail the front and rear cable management for each rack type.

These drawings are delivered in both native CAD and PDF formats with revision control so that future moves, adds, or changes start from verified geometry rather than assumptions.

Common Failure Modes in Documentation Handover

The most frequent failure is mismatched labeling between physical ports and the test reports, which occurs when installers apply labels from a pre-printed sheet that does not reflect last-minute port reassignments. This forces the operations team to retest or trace every link before the cluster can be accepted.

Another common gap is omission of end-to-end polarity verification on MPO trunks; a single reversed pair will pass continuity but will prevent the fabric from training. The error is caught only when the first workload attempts to use those links.

Incomplete firmware version capture leads to later mismatches when nodes are replaced; the handoff package must contain the exact versions observed at commissioning so that drift can be detected during the first health checks.

Operator Handoff and Sign-Off

The final package is reviewed in a joint walk-down where the deployment crew demonstrates that every test report matches the physical installation and that all assets are reachable from the management network. Sign-off occurs only after the operator confirms they can power on the rack, run the OEM diagnostics, and see the expected fabric topology.

Leviathan Systems archives the complete package with the customer and retains a controlled copy for warranty support. Any open items are logged with owner, due date, and verification method before the rack is handed over.