Windows 8.1 CRC error reading volume.

[Gregg H]

I am using CreateFile to open a snapshot volume, and ReadFile to read from it. On one system I had an attempt to read 1 mb fail with a CRC error. As I understand it, the drive should be doing its own bad sector mapping, but apparently it's not. I know that NTFS has bad sector handling, does that apply only to reading/writing at the file level? In other words, by reading at the volume level am I bypassing anything the OS might do to "hide" bad sectors?

 

[Neemobeer]

Windows maintains bad sector information in the MFT so if you're bypassing the file system, then you'd need to do your own bad sector checking.

 

[Neemobeer]

The 9th entry in the MFT so index 8 points to a file called $BadClus this file contains a list of all bad sectors. You would need SYSTEM access in order to read the MFT though.