We’ve updated the CloudLinux kernel on our shared and reseller servers. When a new kernel is installed, it requires a quick reboot, so there was a small downtime of 2 minutes.

The new kernel fixes several internal limits and was applied at a time we see very little traffic to our servers (3AM).

We have been informed this afternoon of planned maintenance to the power systems at Spectrum House.

Date: 02/10/2010
Time: 00:00 – 08:00 (UK Time)
Downtime: < 8 Hours

Explanation
During the installation of an additional 500kva UPS to the datacentre, engineers discovered a fault with the panel which meant the additional UPS could not be connected. To repair this fault the electricity needs to be isolated from the panel, as engineers cannot work on the panel while it is live for safety reasons.

The manufacturer of the panel, Schneider, is sending a team of engineers to repair the panel so that it can accept the fourth 500kva UPS.

Downtime
Unfortunately we’ve been informed that this maintenance will cause approximately 8 hours of downtime. We have been instructed to shut the server down at around 00:00, then it will be started back up as soon as the maintenance is completed.

Questions?
If you have any questions or concerns please contact us and we’ll be happy to discuss any questions you may have.

Updates:
03/09/2010: Date has been corrected – sorry for any confusion.

02/10/2010: This work has now been completed successfully. All servers are back online.

We will be carrying out maintenance which is applicable to some of your services with us.

Maintenance Type: Network
Expected effect on your service: No Effect
Expected downtime duration: 0 minutes
This will occur between 05:30 and 08:00 on 07/06/2010 (UK Time)

The following servers are relevant to this message:

VZ1 (VPS Node)
Pluto (cPanel Node)

We will be performing maintenance as detailed below which will put your service in an “at risk” status. During the period of maintenance we do not anticipate any impact to your service but the nature of the work means that there is a risk; albeit minimal. As such there should be no interruption to connectivity.

During the maintenance we will be testing additional DDoS mitigation features on our core devices. At no point should these tests affect the services you have with JSHosts.

We apologise for any inconvenience this may cause, please do not hesitate to contact us if you have any queries or questions regarding this maintenance window.

Update:
This maintenance has been completed. No downtime was experienced.