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For RU wide service interruption see meldingen.ru.nl.
Every half year we do clusternode maintenance, with at least a package ugprade and a reboot, but sometimes other maintenance can happen, such as changes in filesystems or network configurations. The upcoming date for this maintenance is February 6th, 2026 (Friday)
A power failure in a rack in a server room brought some C&CZ servers down. After less than two hours all problems were dealt with. Affected systems ware mainly: postvak (Science mail server), bundle (user homedisk), heap/stack (network discs), resser/kookpunt/brievenbus/rustug (mail transport smtp servers)
A defective hard disc has been replaced in a server, but the server needs to be rebooted to ensure that this is reboot proof. The MySQL database of roughly 70 websites will therefore be down for a short time. Since this server also provides the Kerberos authentication for Linux clients, Linux clients might encounter service interruptions during a short period.
The UCI network management reports that at this moment the incoming version of Eduroam doesn’t work for iPhone/iPad/iPod. A solution is being worked upon. Eduroam incoming means that one uses the wireless network of a remote institute, with authentication (login/password) being checked by RU or Science.
Thursday July 7, around 13.00 hours the server “plenty” could not be reached. Because this server serves the “xpsoftware” share for the Managed Windows PC’s, all these PC’s had a problem. After the server was restarted and the disks had been checked, it was available again at 14:26.
In order to improve the cooling of a server room, we plan to move three racks of Science servers a few meters on Sunday morning, July 3. We will have to switch off a lot of servers temporarily. Therefore several services will be unavailable some time starting July 3, 09:00 hours. We expect the downtime will last until 10:00 hours for servers with a lot of different users. The cn compute cluster will probably be fully operational again at 12:00 hours. ...
This morning, in the network hub for Huygens South a UPS (battery power supply) went down, which made a set of network switches loose power. Because of this, users in Huygens wing 1 and spin-off companies lost their connection to the network. After bypassing the UPS, everything was up and running again at 11:30. We are still searching for the exact origin of this outage.
You can’t reach certain fixed phones at the university right now, mobile phones and Skype do work ok though.
A backup cooling system will be installed in our main computer room. Therefore the air conditioning system must be switched off, which means that most of the computer facilities in this room must be shut down. This includes the cluster nodes cn00 through cn53 and many of the web- and file- (network share) servers. It is advised to expect a very limited service level. We will try to keep all home directories and the mail system available. For detailed information about the impact please contact C&CZ. ...
Printer lp5 has been moved to HG00.089. You can’t use this printer at the moment, there’s a problem with the power supply unit.
2 fast-wide 9GB scsi disks are attached to the wnhome wide-scsi controller plugged in: 1 for NetPCs (replacing /vol/netpc from wn0) 1 as staging disk for Amanda (new backup software) Info ...