Practical guides to server repair, upgrades, and compatibility: RAID batteries, server memory, drive trays, power supplies, optics, and tape.
Your array didn't lose a disk — the controller quietly disabled write-back caching. How to confirm a dead BBU or supercap and match the exact replacement.
What registered and load-reduced mean electrically, when each DIMM type is required, mixing rules, and how to decode a server memory label.
Enterprise arrays reject retail drives by design. How OEM firmware, sector formats, trays, and interposers work — and how to buy a true drop-in replacement.
Read the label, match wattage and efficiency tier, and swap safely: a field guide to finding the exact replacement PSU for your server.
How to confirm a failed system board, pull the exact part number from your BMC or service tag, and decide whether a board swap beats retiring the server.
Form factor vs speed, SR/LR/ER reach over multimode and single-mode, why switches reject uncoded optics, and when a DAC beats a transceiver.
Practical guide to running EOL PowerEdge and ProLiant fleets: cold-spare strategy, generation-matched nodes, and the real firmware and OS risks.
Which LTO drives read which cartridges, where the two-back rule ended, and why your SAS tape drive needs an HBA, not a RAID controller.