https://rwmj.wordpress.com/2015/03/24/restarting-squid-results-in-deleting-all-files-in-hard-drive/
An awful lot of noise and nonsense is being made about this bug https://bugzilla.redhat.com/show_bug.cgi?id=1202858 . Here are a couple of facts:
1. The bug was never in any released version of RHEL.
2. It was caught during Red Hat’s internal QA process. The bug report is filed by a Red Hat tester.
In other words, the system works. Anyone who says this is a bug in RHEL or Red Hat is releasing buggy software that will eat your hard drive is lying to you.