Ok, we had around 12gb free on the the filesystem..... then a day later all gone. Users complaining on the site, looked at it and it said 100% full there were old software directories n stuff on there from old installs, and old tar files these totalled around 4gb on a 144gb filesystem so we thought at least move them out and told it to actually delete a user that had 11gb and had left... then migrated it between clusters and now it's not starting up and showing as 100% full.... Help where do I go from here.

If it's not up but the filesystem is mounted how do i get some space on the system to be able to start it up?

Any ideas gratefully appreciated.