There are a few ways that you can bypass a repairing disk error depending on what is causing the error.
If the error is being caused by a corrupt or damaged hard drive, you can try using a live CD or USB drive to boot into your computer and access your files. Once you have accessed your files, you can back them up to an external storage device and then format your hard drive.
If the error is being caused by bad sectors on your hard drive, you can try using a live CD or USB drive to boot into your computer and use a disk cloning tool to clone your hard drive to a new one.
If the error is being caused by faulty hardware, you will need to replace the damaged component in order to fix the issue.