GridStor® (Alternate Data Paths) - Online Help

Copy Data Path Candidates

Use this dialog box to select the data path candidate from the list.

The list of data paths displayed in this dialog box depends on the options selected in the Copy Properties (Data Paths) dialog box.

MediaAgent Name

The name of the MediaAgent.

Library

The name of the library attached to the MediaAgent.

Drive Pool

The name of the drive pool configured to access the library.

Scratch Pool

The scratch pool associated with the data path.

Data Path Properties

Use this dialog box to view the properties of the data path and to establish the data compression, hardware encryption and chunk and block sizes for the data path.

MediaAgent

The name of the MediaAgent used by the data path.

Library

The name of the library used by the data path.

Drive Pool

The name of the drive pool used by the data path.

Scratch Pool

The name of the scratch pool used by the data path.

Enabled

Indicates whether the data path is enabled or not.

Silo

Indicates whether the data path is configured for Silo storage.

Index Cache

The name of the Index Cache used by the data path.

Hardware Compression

If selected, hardware data compression is established for all data that is backed up through the data path. Hardware compression has priority over the software compression mode, which is established in the Storage Device (Data Transfer Option) dialog box in the Subclient Properties. (This option only applies when the library associated with the data path is a tape library.)

Perform a full backup on all the subclients that are associated with the storage policy copy whenever you change the compression format to ensure that synthetic full jobs complete successfully.

Use Hardware Encryption

If selected, hardware encryption of data will be enabled if the tape drives associated with the data path support encryption.

Enable this option only when the drives associated with the data path support encryption. If this option is enabled and the hardware does not support encryption, jobs using the data path will fail.

Chunk Size (MB)

Chunk size applies to both disk media and tape media. The default chunk size for tape media in NDMP libraries is 4 GB. The default chunk size for disk media is 2 GB. Changes to chunk size settings take effect the next time the job is run.

When multiplexing streams to the same chunk, the chunk size that is used by all of the streams is determined by the first stream in the multiplex queue.

  • Use Application Setting

    Specifies that the data path will use the chunk size configured for the agent in the Chunk Size tab of the Media Management Configuration dialog box available in the Control Panel. (Applies only to tape media; for disk media the system by default uses 2 GB as the chunk size.)

  • Use Specified Value

    Specifies that the data path will use the specified value as the chunk size. This value will override the chunk size configured for a specific Agent, and the default for the disk. Use the space to type the new value.

Block Size (KB)

Block size applies only to tape media in direct-attached libraries.

Changes to the block size settings take effect when the next spare tape media is used.

  • Use Media Type Setting

    Specifies that the data path will use a fixed block size of 64K to read/write to all media types.

  • Use Specified Value

    Specifies that the data path will use the specified value as the block size. There are several considerations associated with changing the block size.

On disk libraries to Centera Clusters, a block size of 32 KB is always used and user-defined block sizes are not applicable.