Frequently Asked Questions

Chances are, others have the same questions that you do. Therefore, we have taken the common questions for Diskeeper, Sitekeeper and Undelete and provided the answers (and the questions) below in our Frequently Asked Questions section. Simply select the product below that you have questions about. If you can’t find the answer you’re looking for, you can submit a tech support question here.

Diskeeper | Sitekeeper | Undelete

Question
Diskeeper leaves a small portion of system files (green files) in the middle of the drive.
Answer
That second bit of green in the middle of the disk is the MFT Mirror. The first dozen or so blocks of the MFT (Master File Table) are critical; if you lose them, you lose everything on the drive. Those blocks are duplicated in the MFT Mirror, which is positioned in the middle of the disk. This makes it very difficult to lose both copies. You may have noticed that the MFT always has at least two fragments; you can't get it to one fragment. That extra fragment usually represents the MFT Mirror.

Question

Diskeeper leaves a small portion of system files (green files) in the middle of the drive.

Answer

That second bit of green in the middle of the disk is the MFT Mirror. The first dozen or so blocks of the MFT (Master File Table) are critical; if you lose them, you lose everything on the drive. Those blocks are duplicated in the MFT Mirror, which is positioned in the middle of the disk. This makes it very difficult to lose both copies. You may have noticed that the MFT always has at least two fragments; you can't get it to one fragment. That extra fragment usually represents the MFT Mirror.

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