GitLab server disk filled and repositories began to purge

Last night we ran into an issue where our gitlab server’s drive filled and found repositories missing in alphabetical order for repos starting with A-C and D named repos were half missing before we intervened.

We’ve doubled the drive size, restored missing data, and put new alerts in place moving forward but are looking to analyze what particularly could’ve been the cause of the data purge which is behavior we did not expect.

According to our linux admins this is the only service running on this machine, so I’ve been trying to find support threads or official documentation that states GitLab behavior when the disk runs out of space.

Thank you!