User data loss for Jupyter Notebook service 21/02/2023

During some routine maintenance on Tuesday 21st Feb 2023, we encountered data loss of users volumes on the Jupyter Notebook service.

The issue was caused by a mix of operator error and a bug in the underlying storage component of the service.

We have explored options for data recovery, but we have concluded that it is technically unfeasible.

We have written a blog post which explains the technical situation we encountered, for those who might be interested.

We sincerely apologise for any inconvenience this might have caused.

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