If you have 7.5GB free, runs a rebuild command that downloads the new Discourse image that is over 2.5GB in size, by the time the disk space check comes you will have under 5GB free and fail the check.
Your options are:
-
Pass
--skip-prereqsas a rebuild flag the script. You risk running out disk space and getting your site broken and needing to recover from a backup and a new install. -
Increase your disk space.