University of Cambridge Computer Laboratory - Notice history

All systems operational

100% - uptime

Caelum Console (server management) - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 99.61%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 202699.61% uptime

Request Tracker - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 100.0%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 2026100.0% uptime

Other Internal Services - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 99.61%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 202699.61% uptime

External Services - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 100.0%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 2026100.0% uptime

Network - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 100.0%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 2026100.0% uptime
100% - uptime

GN09 - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 99.60%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 202699.60% uptime

WCDC - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 100.0%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 2026100.0% uptime
100% - uptime

Main VM Pool (WCDC) - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 100.0%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 2026100.0% uptime

GPUs - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 99.61%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 202699.61% uptime

Secondary VM Hosts - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 99.61%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 202699.61% uptime

Xen Orchestra - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 100.0%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 2026100.0% uptime
100% - uptime

Filer - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 99.61%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 202699.61% uptime

Archive Server - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 100.0%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 2026100.0% uptime

Data Replication - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 100.0%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 2026100.0% uptime

Other Secondary Storage Systems - Operational

100% - uptime
Mar 2026 · 100.0%Apr · 100.0%May · 100.0%

Previous page

Next page

Mar 2026100.0% uptime
Apr 2026100.0% uptime
May 2026100.0% uptime
100% - uptime

Third Party: Fastmail → General Availability - Operational

Third Party: Fastmail → Mail delivery - Operational

Third Party: Fastmail → Web client and mobile app - Operational

Third Party: Fastmail → Mail access (IMAP/POP) - Operational

Third Party: Fastmail → Login & sessions - Operational

Third Party: Fastmail → Contacts (CardDAV) - Operational

Notice history

May 2026

Network maintenance: GN09 servers
Scheduled for 16 May, 2026 at 04:00 – 04:00
  • Planned
    16 May, 2026 at 04:00
    Planned
    16 May, 2026 at 04:00

    We will upgrade the software on our 1Gbps network infrastructure in GN09, in order to rectify a known urgent issue and to maintain the security and reliability of the network. This is expected to cause around 15-30 minutes' outage affecting all servers in GN09, except those with 10/40/100Gbps connections.

    It will not affect virtual servers on departmental infrastructure, GPU servers, departmental storage servers (filer etc.), offices, wifi or phones.

Power outage affecting William Gates Building
  • Monitoring
    Monitoring

    WGB and GN09 infrastructure is operational again. Most GN09 servers and services have been restored.

    It is likely that some systems may not have started correctly, or may have entered a broken state if running elsewhere but relying on systems in GN09. This is especially likely if they use filer or other networked storage that lost power. Contact service-desk@cst.cam.ac.uk to report any issues.

    The UPS supplying power to part of GN09 has apparently suffered a fault whilst powering back up after the outage, and one third of its capacity is currently inoperative; resilience is reduced until repairs can be arranged.

  • Update
    Update

    Power appears to have been restored, and some systems have come back up automatically, however full restoration of services will take time and will only begin once we are confident that the power supply is stable and the UPS batteries have had some time to recharge.

    We are aware of at least one apparent hardware failure arising from this outage so far.

  • Identified
    Identified

    Servers in GN09 not connected to a UPS supply, and machines in offices, have lost power. Servers in GN09 connected to a UPS supply are likely to lose power in a few minutes. UK Power Networks has confirmed the outage and expects power to be restored around 01:30-02:30. Most departmental IT services will be unavailable until further notice.

  • Investigating
    Investigating

    We are aware of a possible site-wide power outage affecting the William Gates Building, including servers in GN09.

Apr 2026

Network maintenance: West Cambridge Data Centre
  • Completed
    27 April, 2026 at 04:30
    Completed
    27 April, 2026 at 04:30
    Maintenance has completed successfully
  • In progress
    27 April, 2026 at 04:00
    In progress
    27 April, 2026 at 04:00
    Maintenance is now in progress
  • Planned
    27 April, 2026 at 04:00
    Planned
    27 April, 2026 at 04:00

    We will upgrade the software on our 1Gbps network infrastructure in the West Cambridge Data Centre, in order to rectify a known urgent issue and to maintain the security and reliability of the network. This is expected to cause around 15-30 minutes' outage affecting physical servers in the department's racks in the West Cambridge Data Centre (except those with 10Gbps connections).

    It will not affect virtual servers on departmental infrastructure, or storage servers (filer etc.).

    It will affect the Morello cluster.

Network maintenance: offices
  • Completed
    26 April, 2026 at 04:30
    Completed
    26 April, 2026 at 04:30
    Maintenance has completed successfully
  • In progress
    26 April, 2026 at 04:00
    In progress
    26 April, 2026 at 04:00
    Maintenance is now in progress
  • Planned
    26 April, 2026 at 04:00
    Planned
    26 April, 2026 at 04:00

    We will upgrade the software on the office network infrastructure, in order to rectify a known urgent issue and to maintain the security and reliability of the network. This is expected to cause around 15-30 minutes' outage affecting wired ethernet connections in offices, labs and public areas of the William Gates Building, as well as wifi and phones.

    This outage has been scheduled to take place automatically early on Sunday morning in an attempt to minimise disruption.

    Similar outages affecting servers in GN09 and the West Cambridge Data Centre are being scheduled separately.

Archive server (jerakeen) rebooting
  • Completed
    16 April, 2026 at 22:05
    Completed
    16 April, 2026 at 22:05
    Maintenance has completed successfully.
  • In progress
    16 April, 2026 at 21:30
    In progress
    16 April, 2026 at 21:30
    Maintenance is now in progress
  • Planned
    16 April, 2026 at 21:30
    Planned
    16 April, 2026 at 21:30

    Due to an issue that requires urgent attention, the archive server jerakeen will be rebooted shortly. An outage of 30-60 minutes is expected. This will affect access to certain paths in /auto/archive, /auto/gfxdisp and \\archive-smb.cl.cam.ac.uk.

Mar 2026

Office network outage (WC1C)
  • Resolved
    Resolved
    This incident has been resolved.
  • Identified
    Identified

    Due to an electrical disturbance, the network infrastructure serving network port IDs starting WC1C is rebooting and will be offline for a few more minutes. Wired and wireless networking in affected offices (parts of FE and FC corridors) will be unavailable for a short while.

GN09 cooling fault
  • Resolved
    Resolved
    This incident has been resolved.
  • Monitoring
    Monitoring

    Provisionally, the cooling fault appears to have been rectified. We will allow the facility to reach its normal temperature again and will monitor stability before restarting the small number of servers that we shut down.

  • Identified
    Identified

    Following some building maintenance this morning, cooling for our data centre GN09 is currently inoperative. An engineer has been urgently requested to attend.

    It is likely that unless the problem can be solved quickly, we will have to shut down servers in GN09.

Mar 2026 to May 2026

Next