I've got a disaster on my hands. A company I just recently began work for has an old JIRA 4.0.1 install running on an old box -- that box's hard drive just crashed on us.
I installed JIRA 5.2.8 with MySQL (old installation also used MySQL) but now I don't know how to import the old data. I doubt the last admin did whatever intelligent backup / export process was required to make this simple, plus the huge version jump.