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d.ecs storage manager Data Domain

With the Data Domain module, the d.ecs storage manager can store documents in an EMC² Data Domain system. It supports file retention technology, which protects documents from being modified or overwritten for a defined period of time.

Warning

In order to ensure audit-compliant storage, the documents must be written to a volume protected by file retention technology.

Furthermore, a new user should be created in the Windows structure. From the perspective of d.ecs storage manager, this is the only user who requires Full Control rights to the storage area of the Data Domain system. d.3 process manager, in which the d.ecs storage manager runs, is then started under this user.

If several users have Full Control access to the Data Domain volume, documents may end up being incorrectly written to the volume when d.ecs storage manager is started under a different user, and it may not be subsequently possible to extend the documents due to missing rights.

If other d.3 processes run in this d.3 process manager, you must also consider the rights required by these other processes.

To use the "File Retention" function, you must activate a separate license in the Data Domain system. This license must be purchased separately. If necessary, consult the documentation for the Data Domain system or contact EMC² support for the correct settings of the Data Domain system.

Warning

To store the documents with the d.ecs storage manager on a Data Domain file system, it is essential that the default, minimum and maximum retention periods for the Data Domain file system are set according to the retention periods used in the leading system (d.3/ecspand).

Configuration
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Objective: List of the target paths where the documents are stored and their properties.

Alias: Alias name of the volume.

Storage path: Target path where the documents are stored.

Upper storage limit: Specifies how much storage space may be used for storing data.

Rewritable: If this option is set, the data will be re-written as soon as the available storage space falls below the Lower storage limit.

Lower storage limit: Specify the percentage of disk space which may be occupied before documents can be stored again.

Volume ID: Every storage path gets a unique volume ID.

Force CAS creation: If this option is enabled, then the documents are stored in CAS containers. These containers have a unique ID which is used to verify the consistency of a document during restore. (During the retrieval it is checked, if the data in a CAS container are unchanged before a document is passed on to the d.3 server/d.3 gateway/API). Should be enabled in connection with ecspand.

Validate data: If this option is enabled, then a file comparison based on the RipeMD256 hash procedure after copying a file to the Data Domain volume to make sure that the file was transferred completely.

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File name for HealthCheck: File name to be used during the system check by the HealthCheck process.

Volume configuration
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Alias: Alias name for the volume. If a name is specified here then this is used instead of the volume-ID in the web interface. This is used for a better overview.

Storage path: Specify a path here where the documents are stored

Upper storage limit (in %): Here you can define a percentage of how much storage space may be used for the storage of data.

Lower storage limit (in %): Specify the percentage of hard disk space which may be occupied before documents can be stored again.

Rewritable: This option is only available, if more than one volume is configured and specifies, if a volume should be rewritten as soon as the lower storage threshold of the volume is exceeded (e.g. by deleting old documents).

Minimum/maximum retention period (in months) Specifies the range in which the retention time passed by the delivering process may be located for a document. These values have to be set and must be equivalent to the settings of the DataDomain system.

Automatically correct retention period: If a retention-period outside the specified range is passed by a delivering process, the time is automatically set to the minimum or maximum, if this parameter is enabled. Else the job is blocked and the document is not written to the secondary storage.

Log in with the following user: If this parameter is enabled, the d.ecs storage manager automatically tries to log in to the respective volume. This parameter only has to be enabled, if the d.ecs storage manager is executed under a user account which does not have access to the volume.

User: User to be used for the login to the volume.

Password/Confirm password: Password of the user to be used for the login to the volume.

Status: One of three possible values of the volume is displayed. Use the Reset volume status button to reset the status of a volume to Waiting.

  • Waiting: There is currently no writing on the volume.

  • Writing: Currently writing on the volume.

  • Full: The volume was written on until it exceeded the configured memory limits. The volume cannot and will no longer be written to.

Index recovery

The d.ecs storage manager Data Domain module allows to recover the internal document index after a loss. For this effect, it browses the specified target directory for documents and thus rebuilds the index. This type of index recovery should only be used, if no index-recovery-files (*.IR) exist to restore the index (also see Tab: Database logging).

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Storage-directory: Directory on the Data Domain system to be searched for documents.

Index directory: Directory where the index of the documents for the Data Domain system is to be stored.