The IMAP server got overloaded again which could not be due to user usage. The server was rebooted since all I/O processing was stopped and we could not kill any processes. Snapshots have now been completely disabled. It took quite some time before the server had all disks and filesystems in working order.

There was a problem with a failed harddisk of the IMAP server. This slowed the machine down so that it was practically unusable. The problem was solved by replacing the disk.

As reported by the ISC, the RU was victim of a DDOS attack. As a consequence of this is the connection to the Internet was interrupted. Measures have been taken to prevent a similar attack having this result in the future.

The network switches in the buildings/floors/locations mentioned above will be replaced. This means that both wired en wireless networks at these locations will be interrupted and network traffic will not be possible. This includes the network for access control, climate control etc.

The server nachtwacht reports having a hard drive that will soon fail. We will replace the disk as soon as possible.

The server that acts within FNWI as first DNS resolver crashed, probably because of a disk becoming defective. This made the network slow or even virtually unusable for a lot of computers in FNWI. Only after a reboot of the server, the problem1 was solved. Monday morning, at the weekly reboot of this server, it would only boot after manually acknowledging the defective disk (problem2), When other servers rebooted at 06:30, a lot of them had problems due to the missing DNS resolver. Further measures to reduce the inconvenience of such a crash have been taken. The move to new DNS servers is in preparation.

Resolved by a server reboot. Affected network shares: acfiles ARK-Backup Bargerveen Bargerveen-Gebruikers beevee bioniccell bio-orgchem B-Ware-Arnica B-Ware-Dotter B-Ware-Erica B-Ware-Knolrus B-Ware-Lobelia B-Ware-Stratiotes celbio1 celbio2 csgi-archief csg-staf cvi desda ds ehef1 evsf2dataoud evsf2schijf1 femtospin Floron geminstr2 giphouse gissig gmi hfml-backup hfml-backup2 highres impuls introcie isis janvanhest kaartenbak kangoeroe microbiology microbiology2 milkun2 milkun3 milkun5 milkun6 milkun7 milkun7rw molbiol mwstudiereis neuroinf neuroinf2 nfstest nwibackup olympus puc RandomWalkModel Ravon-Algemeen Ravon-Foto Ravon-Projecten secres2 sigma sigmaalmanak sigmacies sigmaexchange sigmasymposium splex spmdata3 spmdata4 spmdata5 spmdata6 spmdata7 stroom thalia ucm vsc vsc1 vsc10 vsc11 vsc12 vsc13 vsc14 vsc15 vsc2 vsc3 vsc4 vsc5 vsc6 vsc7 vsc8 vsc9 vscadmin wiskalg wiskunde

The network switches in the buildings/floors/locations mentioned above will be replaced. This means that both wired en wireless networks at these locations will be interrupted and network traffic will not be possible. This includes the network for access control, climate control etc.

Because of a software upgrade of the network switches in the buildings/floors/locations mentioned above, these network switches will be rebooted at 06:00h (AM) exactly. This means that both wired en wireless networks at these locations will be interrupted for 10 to 15 minutes and network traffic will not be possible. This includes the network for access control, climate control etc.

After the network maintenance of 20141111 a single user reported later a problem with the wired network. These problems intensified and grew faculty wide on 20141119 at 13:34 hours. The network switches in the Faculty of Science received so many topology changes of the Spanning Tree Protocol (STP) that network traffic often stuttered. By curbing the STP traffic on 20141120 at 15:32 the stuttering disappeared. We still search for the exact cause, probably it is a housing move.