Category Archives: system event

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

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

Posted in News, Service Update, system event | Leave a comment

Forum server room UPS

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

Posted in News, Service Update, system event | 2 Comments

Explanation of Yesterday directory

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

Posted in system event | Leave a comment

SATABeast2 disk failures

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

Posted in system event | Leave a comment

Unexpected file server problems on the 19th of June

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

Posted in system event | Leave a comment