**Title:** Sheffield DC1 PDU replacements - April 2022.

**Date:** Thursday 28th April 2022 - Friday 29th April 2022.

**Window:** 20:00 - 00:00.

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## Brief
We are replacing two Power Distribution Units(PDU) within a rack that have developed faults that cannot be resolved without physical replacement. Devices with single power supply units(PSUs) will have a brief period of downtime as we move the supply to a new PDU. Devices with dual PSUs with run from a single PSUs for a brief period as we move the secondary supply to a new PDU.

## Testing

We intend to use the test instructions normally used for post patching testing but you should take the opportunity double check these are complete and/or otherwise make yourselves available throughout the window for repeated testing.

Engineers will be performing upgrades on the Legacy Hosting Firewalls.
No downtime is expected during these works.

Work on this has now been completed.

We need to perform an urgent restart of a network switch. We will update this service notice with more information.

20:00 - Works have been completed on this incident.

We are due to perform system upgrades on our platform that manages our Domain Names. This will affect the access of the following URLS:

https://purely.domains/

The work is expected to take approximately 60 minutes.

Customers will be unable to raise or update support tickets or access their billing information on the above URLs during this period. The management and registration of domain names via Purely.Domains will be unavailable throughout.

This work has been completed successfully.