Fragmentation levels in the disk mount paths can be analyzed using the Disk Library Maintenance job. The files in the selected mount paths are analyzed and the fragmentation statistics are reported in the Library and Drive Report. Based on the file fragmentation statistics reported, use the appropriate tools to defragment the disk library.
Notes
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Commvault recommends defragmenting disk library volumes when needed to ensure performance. Commvault does not support calls on any third-party defragmentation tools. However, Diskeeper has certified its 2011 (and higher) release version for online volume defragmentation.
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Ensure that no backups are running to the disk library on which you want to run defragmentation and follow the defragmentation procedures specified by Windows.
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This feature is supported only on Windows MediaAgents.
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Disk Library Maintenance job does not support network paths.
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Disk Library Maintenance job does not support MediaAgents using the following transport modes:
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Fibre Channel (FC)
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Internet SCSI (iSCSI)
Before you analyze the fragmentation levels, set the appropriate fragmentation margin using the following parameters in the Media Management Configuration (Service Configuration) tab:
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Per File Fragmentation Threshold - Specify the number of fragments per file fragmentation limit per file beyond which the file is considered fragmented. The default value is 10.
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Mount Path Fragmentation Threshold Percentage - Specify the fragmentation threshold percentage for the mount path. If the threshold exceeds this percentage, then the Library Management Maintenance Required alert, if configured, is triggered. The default value is 100.
Procedure
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From the CommCell Browser, expand to Storage Resources | Libraries.
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Right-click the appropriate library, and then click Disk Library Maintenance.
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From the Disk Library Maintenance dialog box, click the Analysis check box beside the appropriate mount paths.
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Do either of the following:
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To run the maintenance job immediately, click OK.
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To schedule the job, click the Job Initiation tab.
Click the Schedule option and select the necessary scheduling option and then click OK to save the schedule.
The results of the job can be viewed from the Disk Library Maintenance Job Summary Report.
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