Category Archives: system event

Upgrade of rack power bars in Forum self-managed server room IF-B.Z14

Posted on February 15, 2019 by idurkacz

We are about to upgrade all rack power bars in the Informatics Forum self-managed server room IF-B.Z14. We will be replacing the existing metered power bars (APC models AP7853 and AP8853) with switched versions (APC model AP8953). The new power … Continue reading →

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Forum server room UPS

Posted on January 24, 2019 by idurkacz

Last weekend (Saturday 19.1.19), the UPS system which supplies power to the various server rooms located in the Informatics Forum developed a fault which meant that one half of the pair of units which comprise the UPS went off-line. As … Continue reading →

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Explanation of Yesterday directory

Posted on May 15, 2015 by neilb

As happened today, “Yesterday” isn’t always yesterday! A brief explanation. All AFS home directories (and some group areas) contain a Yesterday sub-directory. This directory contains a copy of your home directory from “Yesterday”, which can be useful if you accidentally … Continue reading →

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SATABeast2 disk failures

Posted on October 3, 2014 by neilb

Yesterday evening, our SAN storage device satabeast2, suffered 2 disk failures. We can cope with 1 disk failure (RAID5), but following that first disk failure there is a period of time, while the redundancy is restored, that should a second … Continue reading →

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Unexpected file server problems on the 19th of June

Posted on July 18, 2013 by neilb

In the late afternoon of Wednesday 19th of June, around 4:50pm, there was an unexpected glitch on the Informatics SAN (Storage Area Network). This caused some of our AFS storage to go offline for several hours. What follows is a … Continue reading →

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