I use time machine to back up my data to a 300 Gb external iomega disk that I purchased back in 2006. Yesterday, Time Machine could not complete a backup and returned a 'Could not create the backup folder' error. I ran disk utilities and it returned a host of errors, ending with the message that the disk is corrupt, could not be repaired and I had to back up my data immediately. The data on the disk was however, still accessible. While I was already looking at ordering another disk, Time Machine successfully completed a new backup on the iomega (I didn't do anything). Ran disk utilities again--> same message about a corrupt disk that was unrepairable. Anyway, this morning I run disk utilities again, this time it repaired everything (matching table counts etc). So, is everything peachy again or should I replace it anyway? All my really critical files are backed up automatically over the net to an off-site secure location, in addition to the regular backup on time machine. I just want to avoid the scenario of losing access to all my historical backups but at the same time, creating backups of backups begins to look foolish.