All of my JIRA data has been deleted after a restart

Question

So over the holidays my dedicated server that was running PC was shut down. Upon starting it back up I noticed JIRA wasn't running so I ran the cron script to initialise it, and I end up being greeted with the JIRA installation screen. I check the JIRA home folder and it looks like everything has been deleted. Why? I don't even have any viable backups because for some reason they stopped being generated over a year ago, which was when I first created the server.

Michael Wan · Answer

To add to that, JIRA db backup service would save the xml backup file in the $JIRAHOME/export directory. I do not recall if it is turn on by default, but worth to look for it.
If found, the file can be used to re-import the data back to JIRA: https://confluence.atlassian.com/adminjiraserver/restoring-data-from-an-xml-backup-938847707.html

Nic Brough -Adaptavist- · Answer

That is one of the more common reasons for the h2 database catastrophically failing.  But Tomcat wouldn't scrub anything, your data should all still be there.

I'd scan the file system for .zip files that might be backups, you might be able to rebuild a Jira system if you can find one.

Peter Davidson_590l7u · Answer

It did in fact point to h2db, so my only guess is that because the PC was forcibly shut down it corrupted the DB file?