Kopinma SATA 4-Disk Backplane Server Expansion Board

Kopinma's backplane occupies the practical middle of a DIY storage build: between four SATA drives and the rest of the system, one board that organizes data, power, and status. Each of the four positions supports drive speeds up to 6Gbps over SATA, with connectivity through SATA 7-pin data interfaces and a gold-plated SAS 29-pin socket arrangement — the connector layout that lets a drive slide into a bay and seat without individual cable-wrangling.

The board's power design is its quiet strength. Two large 4D supply inputs share the load, and an electrolytic capacitor configuration smooths delivery — the difference between four drives spinning up gracefully and a marginal rail browning out under simultaneous load. A 12V fan interface mounts cooling where it belongs, at the drives, powered from the same board. Each bay carries its own power-on and activity indicator, so a failed or idle disk announces itself visually before any software diagnostic runs. The build-it-yourself caveats are genuine: this is a component for people assembling their own cage or server chassis, and the listing leaves mounting dimensions to the builder's verification. For that audience, it delivers the array-bay fundamentals at component pricing.