DiskWarrior

Maybe you should get a GOOD disk fixing utility like Alsoft's DiskWarrior. Plus LaCie IMHO is not the best for firewire externals. Just search this board and you will see hundreds of LaCie problems as well as on other boards. You would be better of going with a drive from OWC.

Start by using DiskUtility on your start up DVD and repair the HD and permissions. Check the S.M.A.R.T. status of your hard drive, in case there is a hardware problem, by selecting the Drive (not the volume) and reading the disk description at the foot of the Disk utility window. If that doesn't work try DiskWarrior, it usually clears up problems like this.

DON'T allow Disk Utility to attempt a repair. It might make the problem worse. Buy DiskWarrior or TechTool Pro. Consider File Salvage for seriously fragged drives. ...

I wish I could get the CD drawer to open. That way I could run Diskwarrior or Techtool Pro, but every attempt to open the CD drawer fails. ...

Ran DiskWarrior 4 and it fixed the problem. The blank icons of files on the desktop had a white icon over them and were removed. ...

Did you try Alsoft's DiskWarrior?

I'm having the exact same problem. I put a drive in a brand new OWC Mercury Elite Pro case. It showed up at first in the Finder but when I tried to access the files, the Finder hung, wouldn't relaunch and I was forced to reboot. Since then I've been getting the "unable to list" message. Here's everything I've tried: Rebuild directory with DiskWarrior Restarted with all...

Reconnect the Hard Drive and see if you can access it with Disk Utility, DiskWarrior or TechTool Pro whilst booted from another Hard Drive. ...

Would DiskWarrior fix these issues, or should I do a reinstall of the OS? ...

Running Diskwarrior on a FileVault enabled laptop. It was mentioned to me that the laptop should have FileVault disabled before running DiskWarrior as DiskWarrior would not include the encrypted Home folder otherwise. Wondering very much whether that is correct or not. ...