What is the self-healing feature of NTFS, and how does it work?

What will be an ideal response?

Self-healing disks is a feature of NTFS introduced in Windows Server 2008. Self-healing means that when software encounters a damaged disk area, NTFS can heal the area without having to take down the server. NTFS self-heals by generating a "worker thread" that repairs data from the damaged area. The data is not available to the software until the worker thread completes its work. The next time the software wants to access that data, it is available for use. Prior to Windows Server 2008, a damaged disk area meant that you had to take down the server and then bring it back up offline to users to run the chkdsk utility that rebuilt the data in the damaged area.