To check your disk image, follow these steps: Although Disk Utility can’t repair the Time Capsule disk itself, it can be used on these disk images, which more often than not are the source of the problem. Time Capsule stores Time Machine backups on disk images. If Time Machine consistently reports errors when backing up to a Time Capsule, or if your backup volume won’t mount at all, here are some things you can try: But what if the drive in your Time Capsule develops errors-as anecdotal evidence suggests is quite common? Although Apple has not yet provided a way to repair your Time Capsule disk directly, there are a few techniques you can try that often bring a wayward disk back to life.
If the hard drive in your Mac starts misbehaving, you can run Apple’s Disk Utility (or any of numerous third-party utilities) to repair it.
