Method and system for rapid data-fragmentation analysis of a New Technology File System
A method and system for rapid data-fragmentation analysis of a New Technology File System (NTFS) is described. In one embodiment, the Master File Table (MFT) associated with a NTFS volume is analyzed to estimate the extent of data fragmentation on the NTFS volume, the analysis being performed substantially without using directory index information associated with the NTFS volume.
1. A method, comprising:
analyzing a Master File Table (MFT) associated with a New Technology File System (NTFS) volume to estimate the extent of data fragmentation on the NTFS volume as a whole, the analyzing being performed without using directory index information associated with the NTFS volume;
wherein analyzing the MFT includes counting the number of data runs referenced in a data attribute of a record of the MFT, the data attribute including the number of clusters in each data run.
2. The method of claim 1 , further comprising:
reporting to a user the estimated extent of data fragmentation on the NTFS volume; and
recommending to the user that the NTFS volume be defragmented, when the estimated extent of data fragmentation exceeds a predetermined threshold.
3. The method of claim 1 , wherein the counting is performed for each record of the MFT in sequential order.
4. The method of claim 1 , further comprising:
updating a count of fragmented files, when the data attribute references more than one data run.
5. The method of claim 1 , further comprising:
adding the number of clusters in each data run to a count of clusters associated with fragmented files on the NTFS volume, when the data attribute references more than one data run.
6. The method of claim 1 , further comprising:
updating a count of non-fragmented files, when the data attribute references only one data run.
7. The method of claim 1 , further comprising:
adding, when the data attribute references only one data run, the number of clusters in the one data run to a count of clusters associated with non-fragmented files on the NTFS volume.
8. The method of claim 1 , wherein analyzing includes counting used clusters on the NTFS volume.
9. The method of claim 1 , wherein analyzing includes counting MFT records to count files and directories on the NTFS volume.
10. A system, comprising:
an analysis module configured to analyze a Master File Table (MFT) associated with a New Technology File System (NTFS) volume to estimate the extent of data fragmentation on the NTFS volume as a whole, the analysis module being configured to analyze the MFT without using directory index information associated with the NTFS volume;
wherein the analysis module, in analyzing the MFT, is configured to count the number of data runs referenced in a data attribute of a record of the MFT, the data attribute including the number of clusters in each data run.
11. The system of claim 10 , further comprising:
a reporting module configured to:
report to a user the estimated extent of data fragmentation on the NTFS volume; and
recommend to the user that the NTFS volume be defragmented, when the estimated extent of data fragmentation exceeds a predetermined threshold.
12. The system of claim 10 , wherein the analysis module is configured to update a count of fragmented files, when the data attribute references more than one data run.
13. The system of claim 10 , wherein the analysis module is configured to add the number of clusters in each data run to a count of clusters associated with fragmented files on the NTFS volume, when the data attribute references more than one data run.
14. The system of claim 10 , wherein the analysis module is configured to update a count of non-fragmented files, when the data attribute references only one data run.
15. The system of claim 10 , wherein the analysis module is configured, when the data attribute references only one data run, to add the number of clusters in the one data run to a count of clusters associated with non-fragmented files on the NTFS volume.
16. A system, comprising:
means for accessing a Master File Table (MFT) associated with a New Technology File System (NTFS) volume; and
means for analyzing the MFT to estimate the extent of data fragmentation on the NTFS volume as a whole, the means for analyzing the MFT being configured to analyze the MFT without using directory index information associated with the NTFS volume;
wherein the means for analyzing the MFT is configured to count the number of data runs referenced in a data attribute of a record of the MFT.
17. A computer-readable storage medium containing program instructions, comprising:
an analysis instruction segment configured to analyze a Master File Table (MFT) associated with a New Technology File System (NTFS) volume to estimate the extent of data fragmentation on the NTFS volume as a whole, the analysis instruction segment being configured to analyze the MFT without using directory index information associated with the NTFS volume;
wherein the analysis instruction segment is configured to count the number of data runs referenced in a data attribute of a record of the MFT.