Library Properties (Mount Paths)

Use this dialog box to view or modify the mount path properties of a disk library.

Attributes

• Automatically add data paths for new drivepools configured

  When enabled, the system automatically adds the alternate data paths for a shared library.

• Disks within this library support Hardware Single Instancing

  When this option is selected, the underlying storage is able to do single instancing on files if the same file content is written multiple times. For example, Centera supports hardware based single instancing.

  Note

  For underlying storage hardware like Data Domain which has parsing logic of Commvault's data format, there is no need to write data in individual small files. The data is written in a container format, where multiple files are combined together into a chunk.

  This option is not applicable for Commvault's Deduplication.

• Prevent accidental deletion of data from mountpaths

  Select this option to prevent contents of mount paths (on Windows platforms) from being accidentally deleted. Mount paths created when this option is enabled are protected from accidental deletion.

  Do not enable this option when:

  • The mount path(s) in the library are hosted on WORM hardware that has options to control and prevent accidental deletions, such as SmartLock in Isilon. For more information on enabling the Isilon's Smart Lock feature, see Configuring WORM Storage Mode on Disk Libraries.

    or

  • The Hardware WORM label is enabled in the General tab of the Library Properties dialog box.

Mount Path Usage

The following parameters are applicable when there are several mount paths in the disk library:

• Fill and spill mount paths (Use new mount paths only as needed)

  Specifies that the system should completely consume (fill) the free space in a mount path before using another mount path.

• Spill and fill mount paths (Load balance use of mount paths)

  Specifies that the system should round-robin (spill) between the available mount paths for each job.

  Prefer mount paths with more free space

  Specifies that while using the round-robin method to write the data, the system will use the mount path with the most free space available. The Free space in GB can be defined using the Free space difference in GB to consider preferring mount paths with more free space parameter.

• Select mount path for MediaAgent according to the preferred setting

  Specifies the mount path that must be picked for write operations. (By default this option is cleared .)

  When selected, the mount path set as the 'preferred' mount path for the MediaAgent (selected in the data path), is picked for write operations.

  When cleared, the mount path is picked based either on the 'spill and fill' or the 'fill and spill' option set for the library.

  Note

  Select this option to prevent write operations from occurring over a network.

Mount Path Allocation Policy

• Maximum Allowed Writers

  When selected, maximum concurrent writers on the disk library will be established.

• Allocate number of Writers

  By default, maximum concurrent writers are established on the disk library. To limit the number of writers, type the number of writers that you want to allocate.