Microsoft KB Archive/934915

= Error message when you try to load NTFSDOS Professional: &quot;Last volume sector is not a boot sector mirror&quot; =

Article ID: 934915

Article Last Modified on 7/20/2007

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APPLIES TO


 * Winternals Administrator's Pak 4.2
 * Winternals Administrator's Pak 5.0

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SYMPTOMS
When you try to load NTFSDOS Professional, you may receive an error message that resembles the following error message:

Last volume sector is not a boot sector mirror: unit 80, partition 2. The NTFS partition is damaged, or BIOS is unable to access the partition. No NTFS drives mounted - exiting

This problem may occur when the volume has been upgraded or converted.

Note NTFSDOS Professional is a component of Winternals Administrator's Pak.



CAUSE
When you create an NTFS Partition, one Master File Table (MFT) is written to the head of the partition. Another MFT is written at the end of the partition. If you extend the volume, the MFT is not moved. The system only increases the size of the MFT. Therefore, NTFSDOS Professional cannot view the MFT that is located at the end of the partition.

Additional query words: Winternals KB 30014, boot, sector, NTFSDOS Professional

Keywords: kbtshoot kbexpertiseinter KB934915

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