After pulling an all-night shift, Microsoft engineers have now resolved this issue, which lasted approximately 16 hours.
Engineers determined that a number of factors, initially related to a software error, caused several nodes on a single storage scale unit to become temporarily unreachable, Microsoft said in a status update.
“This, along with the increase in load on the scale unit caused by the initial issue, resulted in impact to customers with Storage resources located on this scale unit.
Its engineers performed a code update to mitigate a software error, reduced background processes in the scale unit and throttled traffic to allow the unit to recover.”
Microsoft Azure is facing availability issues in the south of the UK, with 11 services from Storage through to App Services all unavailable for many customers.
Microsoft says engineers have been engaged to fix the issue, which started at 13:19 UTC on 10 Jan 2019, and are investigating now.