K&K Data Service Inc.Data Center Engineering Lab

Data Center Lab

Errata and Open Questions

This series publishes working engineering analysis from K&K's data center program. Numbers are labeled [TARGET], [MODELED], [SENSITIVITY] or [FACT]; nothing here is field-measured data, and no article is a sealed engineering document. Each article states its own limits and open items.

Column model height register table listing per-column family, type and model height
Column model-height register: the kind of per-identity table these articles audit (study — not cut lengths).
  1. KK-DCL-093Heat-Rejection Site Was Taken From a Substation Name, Then ReversedThe discrepancy between a substation name and the project's own state was raised as a change candidate at the first revision, and the ruling required the chapter holding the correct state to alter its wording.
  2. KK-DCL-094Two Records Ban Double-Counting 642 kW Recharge, Then Disagree What It IsThe shared project memory and the errata chapter both forbid subtracting the charging term twice, and read the figure it was subtracted from as headroom and as a branch load, so the correction that follows points opposite ways.
  3. KK-DCL-095A Model Audit That Verified the Wrong RepresentationVerification effort was spent with high precision on a representation that was never the engineering object under question.
  4. KK-DCL-096A CDU Branch Label Said 11 Units; the Instance Count Was 12A branch label and the underlying instance count disagreed, and the label was the one that travelled into downstream documents.
  5. KK-DCL-097User-Confirmed 155 kW Cabinet Load Has No Owner Approval RecordA vendor document carried a user-confirmed load figure for which no owner approval record exists on our side.
  6. KK-DCL-098Raised CDU Flow Was Square-Law Extrapolated From One Published PointThe operating flow was raised 26.742 per cent and the matching branch resistance was produced by a square-law extrapolation from the single published flow point, in a package whose only supplied curve carries no equipment identity.
  7. KK-DCL-099Four Engineer-of-Record Requests Have No Prerequisite; Three Need the OwnerOf twenty-one drafted engineer-of-record requests, exactly four depend on no other external request, and three of those four name the owner rather than an engineering discipline as the approving party.
  8. KK-DCL-100The 10-Transformer 4+1/4+1 Claim Was Struck, Not the Unit CountA ten-transformer arrangement was struck off the architecture gate's list of already-excluded expressions, on the ground of the availability claim attached to it, while the same unit count survives a few rows away as the cost comparator.