Test Time Is the Real Bottleneck at EVT
Anyone building enterprise SSDs knows that a full burn-in and steady-state performance cycle is measured in days or weeks. The J750/J770 spec sheet lists MTBF ≥2,000,000 hours, UBER ≤1 sector per 10^18 bits read, and 5-year DWPD of 1 and 3 respectively. Those numbers cannot simply be calculated into existence — they need enough samples and enough powered hours to carry statistical confidence. If only a few dozen drives can be racked at a time, sample size and schedule squeeze each other: you either shorten the run or reduce the population, and both weaken the conclusion.
JH-ZS101 was designed to push that bottleneck back, handling 600 SATA SSDs or 480 NVMe SSDs per run. The scale effect is direct: within the same calendar window, more capacity points, firmware revisions, and temperature combinations can run concurrently. J750 spans 1.92/3.84/7.68/15.36TB and J770 spans 1.6/3.2/6.4/12.8TB; crossed with firmware branches, the resulting matrix demands far more samples than small benches can hold.
Five Integrated Process Steps: Less Handling, Fewer Orphaned Data Points
The equipment integrates five test processes including card initialization and burn-in. The first-order benefit is logistical: trays no longer shuttle between an initialization bench, a burn-in cabinet, and a performance rig, so human handling drops and with it the risk of ESD and mechanical damage.
The second-order benefit matters more — data continuity. When initialization and burn-in happen on separate machines under separate software, a drive's identity is stitched together by manual logging, and when an anomaly appears it becomes hard to answer "what was this drive's initial state before burn-in?" With the flow integrated, initialization parameters, the initial bad-block table, powered hours per stage, and alert history all hang off one record for the same physical drive. For EVT purposes, that record is itself a deliverable.
Zoned Thermal Control and Remote Power Cycling: Two Prerequisites for Long Runs
Temperature is the central variable in burn-in, but holding an entire cabinet at one setpoint wastes capacity. Zoned thermal control lets different regions of the same machine run different temperature points — a baseline population at ambient, an accelerated population hot, another under thermal cycling. Physically, that removes the "one machine, one condition" constraint.
Remote network power switching looks like a convenience feature but is actually a prerequisite for long-duration testing. Power cycling is itself an important stress, and PLP validation in particular depends on a large volume of power-loss events. If every cut requires someone walking into the lab, headcount sets the ceiling on event count. Making power cycling a programmable action is what allows events to accumulate unattended overnight and through weekends — which maps directly onto our validation needs for PLP and for online firmware update and rollback.
How It Supports the EVT Evidence Chain
J750/J770 are at product-definition/EVT stage targeting 2026 Q4–2027 Q1, on the internal JH-E4U-C engineering platform. The question at this stage is not "does it run" but "how trustworthy is the conclusion." Equipment scale, process completeness, and programmable conditions all reduce to three things: sample count, powered hours, and the ability to trace every data point back to a specific drive under a specific condition.
Seen another way, building test equipment in house matters because test requirements keep moving as the products do. Our portfolio spans PCIe 3.0 through 5.0 and U.2/U.3 through E3.S, E1.S, and AIC, and each form factor and interface difference places new demands on fixtures and flows. The controller roadmap also evolves — from an external Gen4 enterprise controller paired with our own firmware toward the in-house JHC400 controller platform. Keeping test capability under our own control means the pace of that work is not set by someone else's equipment lead time.