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The following sections describe the various media related operations that can be performed in a tape/optical library.
The media options vary depending on how the library is configured. The following table provides a list of the media operations in the blind/sighted libraries and stand-alone drives.
Options |
Regular Library (with a barcode reader) |
Blind Library (without a barcode reader) |
Stand-Alone Drive, and Removable Disk Disk Storage |
PnP (Plug and Play) Disk Libraries |
| Load Media | X | X | ||
| Export | X | X | ||
| Verify Media | X | X | X | X |
| View Contents | X | X | X | X |
| Move | X | X | ||
| Delete | X | X | X | X |
| Delete Contents | X | X | X | X |
| Erase Media | X | X | ||
| Discover | X | X | ||
| Mark Media Bad | X | X | X | X |
| Mark Media Good | X | X | X | X |
| Mark Media Full | X | X | X | X |
| Mark Appendable | X | X | X | X |
| Mark Media Reusable | X | X | X | |
| Stamp Media | X | |||
| Erase Media | X | X | X |
Block sizes can be modified from the Data Path Properties dialog box available from the Data Paths tab of the Copy Properties dialog box, for the specific data path. (See Set the Chunk Size and Block Size for a Data Path for step-by-step instructions.)
See Also: Performance Tunables for Media Management
Operations performed with this feature are recorded in the Audit Trail. See Audit Trail for more information.
The load media operation loads the media into the drive. You can initiate the load media by right-clicking the media that you wish to load and then choosing the Load Media option.
See Load a Media to a Drive for step-by-step instructions.
You can select the media from the drive and unload it if necessary.
Media residing within a library can be exported to physically remove it from the library. For comprehensive information on exporting media, see Export Media.
The Recall Media feature provides the facility to temporarily bring media back from an export location for a specific operation and return the media to the export location when the operation is complete. For comprehensive information on this option, see Recall Media.
See Recall Media using the Resource View for step-by-step instructions.
The verify media operation is a type of inventory which must be initiated by the user. This operation can be used to verify whether the media information displayed in the CommCell Console matches the OML in the media. You can initiate the verify inventory operation by right-clicking the media that you wish to verify and then choosing the Verify Media option.
A verify inventory operation is displayed as a job in the Job Controller window and can be killed if necessary.
The verify inventory operation does not discover new media.
See also, Verify Media for Blind Libraries.
You can view the contents of a specific used media. This feature can be used to view a list of data protection operations residing in the media, including the data protection operations currently in progress. All the details associated with the data protection operation(s) available in the media are displayed. This includes the following:
You can move spare media between the following pools:
The facility to logically reassign media from one scratch pool to another allows you to ensure that critical operations always have the media that they need. You can also select multiple media and move them from one scratch pool to another.
See the following procedures for step-by-step instructions:
You can move the following Media to Libraray:
The delete media option can be used to delete the media information from the CommCell. Spare and retired media can be deleted to remove them from the scratch pool and Retired Media group. When a media is deleted, the media information is permanently removed from the CommServe database. You can also select multiple media from the scratch pool, and delete them if necessary.
See Delete a Media for step-by-step instructions.
The delete contents option can be used to delete the contents of a media and move it to a specified scratch pool. This option can be used to make media available to complete an important data protection job when there are no spare media available in the library.
|
Caution
Once deleted, the contents of the media are not available for data recovery operations, and the system will not automatically force the next data protection operation to be a full backup. If you delete the contents of the media, you should immediately run a full backup for all the subclients associated with the media once the operations is complete. |
If you have a library configured with mixed drive types, verify and ensure that the media is moved to a drive pool associated with the specific media type.
See Delete the Contents of a Media for step-by-step instructions.
If you have the need to recover data from a media in which the contents has been deleted, see Accessing Aged Data.
Prevent Copy option allows you to disable all the existing jobs in the specified media from being copied.
Allow Copy option allows you to enable the (previously disabled) copy jobs from the specified media.
Re-Copy option allows you to select the existing jobs in the specified media for re-copy. When the re-copy option is selected, the existing jobs will be deleted and selected for re-copy. If the source copy is not available for a job, the existing copy will be retained as is. Re-Copy can be done only on media associated with a secondary copy.
The discover media operation is specific to blind libraries. For comprehensive information on this option, see Discovering Media for Blind Libraries.
If you know that an existing spare or used media is bad, you can mark the media as bad. This will automatically moves the spare media to the Retired Media pool. Note however, if the media is a used or Assigned media, the media will be moved to the Retired Media pool only when the data available in the media is pruned.
See Mark a Media Bad for step-by-step instructions.
If you know that a bad media in the Retired Media pool is fixed and currently usable, you mark the media as good. This will automatically move the media to the Default Scratch pool.
See Mark a Bad Media Good for step-by-step instructions.
If for some reason you do not want to use a media for future data protection operation, you can mark the active media full.
You can also mark all active media as full for a storage policy copy.
See Mark a Media Full for step-by-step instructions.
You can mark full and bad media as appendable. When a media is marked as appendable it can be re-used by the MediaAgent if the Use Appendable Media option is enabled in the Media tab of the Library Properties dialog box.
See the following procedures for step-by-step instructions:
Media migrated from other CommCell can be marked reusable in the current CommCell, even if the media was not marked for reuse during migration. Multiple media can be selected and marked for reuse in a single operation.
See Mark Media Reusable for step-by-step instructions.
You can prevent a media from being exported from the library. Subsequently, you can enable the media for export if necessary. All general media operations can be performed on media that are prevented from being exported. For comprehensive information on exporting media, see Export Media.
The erase spare media operation ensures that the data from removable media (tapes and optical platters) are not recoverable once the media is recycled. Only spare, retired and recycled media from tape and optical libraries can be erased. For comprehensive information on erasing media, see Erase Spare Media.
Media refresh operation enables you to consolidate the data on media and/or to replace an existing old media. Media refresh can be performed on Full media only. For media refresh options at various levels and instructions to perform media refresh, see Media Refresh.