
Provider and customer responsibility for space, power, cooling, network, hardware lifecycle, access and operations — element by element, with the physical boundary named in each case. Attaches to the Service Order Form.

The Service Level Agreement states what Prima commits to and measures it at named points. This matrix states who physically does the work on either side of each of those points. It exists so that no element of the service is assumed by both parties or by neither.
Each row names one element, what Prima does, what the customer does, and the boundary point where responsibility transfers. Boundary points are the same points the SLA measures at — rack PDU input, CDU primary inlet, leaf-switch customer port, rack air inlet — so a service credit and a work instruction always refer to the same physical place.
| Service Order Form | Prevails over this matrix. A SOF may vary any row for the capacity it covers — for example where a customer supplies its own racks or brings its own carrier. |
|---|---|
| Master Services Agreement | Governs the legal relationship. Where the MSA and this matrix conflict on liability or remedy, the MSA prevails. |
| Service Level Agreement | Defines the commitments and the measurement points. This matrix does not create, alter or waive any service level. |
| This matrix | Governs operational responsibility. It is the working reference for day-to-day execution and for resolving who acts. |

Prima delivers a rack, standing, earthed and labelled, on a floor rated for the delivered configuration. Everything mounted inside it is the customer's.
| Element | Prima responsibility | Customer responsibility | Boundary point |
|---|---|---|---|
| Data hall shellEnvelope | Provides the hall, floor, hot and cold containment, fire detection and suppression, and the published floor-loading rating. | — | Hall envelope |
| Rack and cabinetStandard supply | Supplies, positions, levels, earths and labels the rack to the site naming standard. Fits blanking at handover. | Confirms elevation before delivery. Supplies own racks only where the SOF permits. | Rack footprint |
| Floor loadingStructural | Certifies the loading limit per tile and confirms the delivered configuration is within it. | Declares equipment weight and footprint before delivery. | Published loading limit |
| Cage or private suiteWhere contracted | Builds the cage, fits locks and readers, operates key management and the access record. | Nominates authorised holders and confirms them at recertification. | Cage mesh |
| Cable pathwayContainment | Provides overhead tray and sub-floor pathway, and enforces containment fill and separation discipline. | Requests pathway for its own cabling before installation. | Tray edge at the rack |
Prima delivers power to the rack PDU outlet. The customer owns everything downstream of the outlet — cords, power supplies and in-rack distribution.
| Element | Prima responsibility | Customer responsibility | Boundary point |
|---|---|---|---|
| Rack power feedA and B | Dual independent feeds to the rack, N+1 UPS, N+1 standby generation, on-site fuel for 48 hours at full load. | — | Rack PDU input |
| Rack PDUMetered | Supplies, installs and commissions the PDU with per-outlet metering. | Confirms outlet type and count before delivery. | PDU outlet |
| Power cordsDownstream | — | Supplies and connects cords from the PDU outlet to equipment power supplies. | PDU outlet |
| Dual-cord disciplineResilience | Publishes the A/B assignment map for every outlet and verifies balance at handover. | Ensures every device is dual-corded across A and B. Single-corded equipment forfeits the power commitment for that device. | Equipment PSU |
| Contracted drawMetering | Meters actual draw, reports monthly, alerts on approach to the contracted limit. | Remains within the contracted draw per rack stated in the SOF. | Metered value at the PDU |
| OverdrawRemedy | Alerts on breach; throttles job admission at site level if the confirmed allocation is approached. | Remedies within the period agreed at alert, or agrees an uplift. | Contracted draw in the SOF |

The facility is direct-liquid-cooled. Prima owns the loop to the rack manifold; the customer owns cold plates, in-node tubing and node-level thermal control.
| Element | Prima responsibility | Customer responsibility | Boundary point |
|---|---|---|---|
| Chiller plant and CDUN+1 | Operates N+1 chiller plant and N+1 CDUs, holding coolant supply at W27 at the CDU primary inlet. | — | CDU primary inlet |
| Secondary loopDual path | Provides dual-path secondary loops to the rack manifold with leak detection on every run. | — | Rack manifold |
| In-node loopDownstream | — | Cold plates, in-node tubing, quick disconnects, node thermal control and fan curves. | Rack manifold |
| Coolant chemistryFacility loop | Quarterly assay, filtration and treatment of the facility loop; publishes the approved coolant specification. | Uses only approved coolant and materials in the node loop. | Rack manifold |
| Air-side envelopeAncillary | Holds ASHRAE Class A2 at the rack air inlet for air-cooled and ancillary equipment. | Maintains blanking and airflow discipline within the rack. | Rack air inlet |
| Leak responseP1 | Detects, isolates the affected loop, and notifies on P1 timescales. | Powers down affected nodes on instruction from the NOC. | Rack manifold |
Prima delivers the fabric to the leaf-switch customer port. The customer owns host adapters, drivers, fabric tuning and everything above layer 2.
| Element | Prima responsibility | Customer responsibility | Boundary point |
|---|---|---|---|
| Compute fabricInfiniBand | Non-blocking spine-leaf fabric to the leaf-switch customer port, including switch configuration and subnet management. | Host adapters, drivers, fabric tuning, collectives and everything above layer 2. | Leaf-switch customer port |
| Fabric cablingInstalled | Supplies, dresses and labels cabling at both ends; verifies link state at handover. | — | Port face |
| Management networkOut-of-band | Provides out-of-band Ethernet to the management port, segmented from the compute fabric. | Consumes the out-of-band path; owns credentials on its own baseboard controllers. | OOB management port |
| StorageWhere contracted | Presents the parallel namespace to the compute nodes at the capacity and throughput stated in the SOF. | Mount, client tuning, quotas and data lifecycle within its own namespace. | Namespace mount point |
| External connectivitySeparate SLA | Where contracted, delivers to the meet-me room port under a separate connectivity service level agreement. | Carrier selection and contracting where bringing its own carrier. | Meet-me room port |
| Platform baselineBare metal | Firmware and BIOS baseline to the published standard; hands over verified bare metal. | Operating system, container runtime, scheduler and workload images. | Bare-metal handover |
| SchedulingAllocation | Enforces the site-level draw cap above all allocations. | Job admission, queueing and tenancy within its own allocation. | Allocation boundary |

Resident engineers act on written instruction. Prima performs the physical work; the customer decides what work is to be done and supplies the parts.
| Element | Prima responsibility | Customer responsibility | Boundary point |
|---|---|---|---|
| Delivery and receiptInbound | Receives, inspects, stages and records serial numbers against the manifest. | Notifies inbound deliveries with a manifest five business days ahead. | Loading bay |
| Rack and stackInstallation | Installs, cables, powers and verifies link and thermal state. | Supplies the rack elevation and cabling schedule before installation. | Rack |
| AcceptanceHandover | Confirms power, environment and fabric reachability at the port. | Confirms acceptance at workload level. | Reachability at the port |
| Component replacementSmart hands | Performs the swap and handles media under the sanitisation procedure. | Supplies the spare, raises the ticket and owns the vendor return. | Chassis |
| Spares holdingOn site | Stores customer spares in a designated secure location with an access record. | Owns stock level and replenishment. | Spares cage |
| FirmwareChange-controlled | Applies the facility baseline, or a customer-approved version, under change control. | Approves the version and owns testing of its own stack. | Change record |
| DecommissioningExit | De-installs, sanitises or destroys media to NIST 800-88 and issues the certificate. | Instructs, nominates the method, and collects or authorises destruction. | Sanitisation certificate |
| Smart handsWithin SOF hours | Resident engineers 24×7, 30-minute response, for cabling, reseats, swaps, media handling and guided diagnostics. | Provides written instruction and remains reachable while work is in progress. | Ticket instruction |
Prima owns all five physical layers. The customer owns the list of people — who should hold access, and the duty to tell us when that changes.
| Element | Prima responsibility | Customer responsibility | Boundary point |
|---|---|---|---|
| Perimeter to hallAll layers | Operates the five controlled layers, 24×7 officer coverage, surveillance and intrusion detection. | — | Site boundary |
| EntitlementProvisioning | Provisions on request from a named approver; recertifies quarterly; revokes on notice. | Nominates holders, confirms at recertification, and notifies leavers the same day. | Access platform record |
| EscortVisitors | Provides an escort where the visitor holds no entitlement for the layer. | Requests the escort and accompanies its own vendors. | Interior zone |
| Customer vendorsSponsored | Vets, badges and escorts sponsored vendors. | Sponsors and submits details two business days ahead. | Badge issue |
| Surveillance footage90+ days | Retains for the committed period and releases under the disclosure procedure. | Requests footage in writing, identifying time and location. | Disclosure request |
| Law-enforcement demandNotification | Verifies, resists overbroad demands, and notifies the customer unless legally prohibited. | — | Customer notification |

Prima monitors and reports to the rack. The customer owns everything inside its allocation, and tells us when a change there alters draw or thermal profile.
| Element | Prima responsibility | Customer responsibility | Boundary point |
|---|---|---|---|
| Monitoring30-second | Monitors power, environment, fabric and rack reachability continuously. | Workload and application-level monitoring. | Rack reachability |
| Incident detectionNOC | Detects, raises and escalates on the published response targets. | Raises customer-observed incidents through the NOC. | Ticket |
| AvailabilityMonthly | Measures, reports and applies service credits without a claim. | Reviews and queries the reported figure within 30 days. | Monthly service report |
| Planned maintenanceNotice | Notifies by class and executes within the agreed window. | Consents to work outside the window and nominates freeze periods. | Maintenance notice |
| Change — critical pathFacility | Approves through Facilities and Operations with a documented rollback plan. | Notified where service-affecting; may object before the window opens. | Change record |
| Change — allocationCustomer side | — | Owns entirely; notifies Prima where the change alters power draw or thermal profile. | Allocation boundary |
| Capacity increaseExpansion | Offers adjacent capacity under the right of first refusal in the Contract Schedules. | Exercises or declines within the notice period. | Written notice |
Where an element is not listed, responsibility follows the nearest boundary point: upstream is Prima's, downstream is the customer's. Where no boundary is apparent, the element is Prima's if shared with any other customer, and the customer's if it serves that customer alone.
For questions on this matrix, to raise an undefined boundary, or to record a variation agreed under a Service Order Form.