The freezing happens no matter what type of footage/sequence settings we’re using (DV, 8-Bit, DVCPRO, et al.) As of this writing, I’m trying to render out DVCPRO 50 footage.
Render is set to 10 TB XSAN with about 2 TB of available space. Freezing occurs when trying to render to an external FW drive as well. Also when rendering to the desktop, which was more of a last ditch test than anything. We have read/write permission. Quicktime is 7.2, which I think is the latest version.
For what it’s worth, we’ve also had this happen when rendering in After Effects, though with less frequency than FCP. So it’s probably hardware related.
Hope this helps.