As I understand it, directory fragmentation is not nearly as important as corruption so don't assume that a score of 10 means that you don't have a problem.
Indeed with Apple's forthcoming new file system, files and directories will — by design — be extremely fragmented. Directory and file
fragmentation are significant factors effecting the time required to write or read a file on rotating media (a.k.a. Spinning rust, or hard drives.) Neither is much of an issue with Solid State or Flash Media drives and any existing issue is primarily a function of file management systems and data structures carefully optimized for rotating media.
Corruption, on the other hand, means the directory or file is physically damaged. Directories (volume structures) can be recovered. If file damage is a result of directory damage it may or may not be recoverable (remember when cross-linked files were a frequent occurrence?). If the file content is damaged, hopefully you have a good reliable and current backup.
Edit: Originally an off-topic reply to Re: -43 Error Code, this post and the followups were moved to a separate thread.
