Server Parts for Cuba

The failure mode that is not an outage

Most planning for unreliable electricity is built around interruption: the power stops, something takes over, service continues. That is a clean, well-understood event and equipment handles it well. Sustained under-voltage is a different phenomenon and it is considerably harder on hardware, because nothing ever stops and therefore nothing is ever treated as having happened.

A power supply works harder to hide it

A server power supply exists to deliver stable output regardless of what the input is doing. When input voltage sags and stays there, the unit does exactly its job: it draws more current to maintain the same output, and in doing so runs hotter than it was designed to run continuously. From every layer above it the machine looks entirely healthy. Inside the supply, the electrolytic capacitors are ageing at an accelerated rate for as long as the condition lasts.

Which is why the failure looks unrelated

The unit does not fail during the brownout. It fails weeks or months afterwards, apparently without cause, and is recorded as a power supply that reached the end of its life. Because the room shares one electrical supply, every power supply in it has been aged by the same amount over the same period — so the failures arrive as a run rather than in isolation, and the estate is short of exactly the component it needs several of.

Two things worth checking and two worth holding

Worth checking: whether the UPS actually regulates under-voltage or merely passes mains through until the supply disappears entirely, because only the first protects anything here. Worth holding: power supplies in quantity rather than singly, and an array controller battery for each controller in service. ICD supplies both across Dell, HPE, Lenovo, Cisco and IBM, with the greatest depth in generations the vendors retired years ago, each item identified from its serial, tested before dispatch and covered for one to three years. Enquiries for this destination are answered case by case.

Enquiries answered individually

Every enquiry is handled on its own terms: we confirm the exact component from the serial and confirm what we are able to supply and by what route before anything is committed, rather than publishing a standard lane or timescale. All pricing is by quotation, in US dollars, set against the configuration actually installed.