PDU fault in rack AMS-B06
Alimentazione e raffreddamento — AMS · Gestione fuori banda — AMS
Cronologia
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Risolto
Every machine in rack B06 has been up since 02:52 UTC. Duration: 16 minutes. The PDU is being replaced; the 8 machines that lost power receive the SLA extension automatically. Data on local disks is intact; the machines simply rebooted.
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Causa individuata
The A-side PDU in rack B06 failed with a breaker fault. The 8 machines that rebooted are the ones whose B-side supply was not seated correctly after a recent hardware change. All are powered from the B-side now and are booting.
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In analisi
8 machines in rack B06 of AMS lost power at 02:36 UTC. Machines in the rack are dual-fed, but these 8 rebooted when one PDU failed. Engineers are at the rack.
Analisi post-incidente ·
Cosa è successo e cosa è cambiato
Causa
The A-side PDU in AMS-B06 suffered a breaker fault. Every machine in the rack has two power supplies on separate feeds, but on 8 of them the B-side cord had been left partially seated during a hardware change the previous week, so they lost power when the A side went.
Impatto
8 machines rebooted and were unavailable for 16 minutes. No data was lost; the machines came back to the state they were installed in, with local disks intact.
Cosa abbiamo cambiato
- Every hardware change now ends with a power-redundancy test: each feed is dropped in turn and the machine must stay up.
- The faulty PDU model is being phased out across the fleet.
- Term extensions were applied to the 8 machines the same day.
Gli orari sono mostrati nel fuso orario locale ().
Pagine correlate
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