I can't access a large chunk of my Lacie Porsche drive without Finder hanging. I tried to repair the disk in Disk Utility and got this... Verify and Repair disk FW 250 Checking HFS Plus volume. Checking Extents Overflow file. Checking Catalog file. Invalid key length Volume check failed. Error: The underlying task reported failure on exit 1 HFS volume checked 1 volume could not be repaired because of an error help!