Changing the Partition Mode

Use the following procedure to change the mode of a partition. Changing a partition mode using the library web client may affect your host application. See your host application documentation for more information.

There are two partition modes: online and offline.

• Online — SCSI hosts control the partition. In this mode, all host application SCSI commands are processed.
• Offline — SCSI hosts cannot control the partition. In this mode, library operations can be performed via the operator panel or web client.

When changing the partition mode from online to offline, all host application commands in progress at the start of the mode change are completed.

NOTE: Once you setup a policy on a partition, the partition will show EDLM active.

NOTE: Rebooting the library will bring any offline partitions back online.

NOTE: Some maintenance activities require that the entire library be taken offline. To take the library offline, change the mode of all partitions from online to offline.

1. From the Operations menu, select Partition > Change Mode.

   The Change Partition Mode screen displays. In the partition table under Access Mode, the Current column indicates the current mode of the partition. The New column contains an Online/Offline button. The button toggles between modes.

2. In the partition table, identify the partition that requires a mode change.
3. Toggle the Online/Offline button to the desired mode.
4. Click Apply.

   The Progress Window displays. The Progress Window contains information on the action, elapsed time, and status of the requested operation. Do one of the following:

   • If Success displays in the Progress Window, the partition mode was successfully changed. Click Close to close the Progress Window.
   • If Failure displays in the Progress Window, the partition mode was not changed. Follow the instructions listed in the Progress Window to resolve any issues that occurred during the operation.

   Pausing EDLM Scans on Partitions

   You can temporarily halt EDLM scanning in a partition but keep your EDLM policy selections intact so that you can re-enable them later. You might want to do this if you suspect a problem (for example, if it seems that too many tapes are being scanned, and library operations are being affected).

   When you pause EDLM scans, tapes that are currently being scanned finish their scans, are unloaded from the tape drives, and are moved back to their original locations. No further tapes are scanned. Tapes in the queue remain queued. Once unpaused, tapes that would have been queued during the pause period are queued and scans resume as normal.
   To pause automatic scanning, you must change the EDLM mode on a partition, as follows:
5. 1. Under EDLM Mode, the Current column displays one of the following:

If Success displays in the Progress Window, the partition mode was successfully changed. Click Close to close the Progress Window.

• • • Not Configured - EDLM policies have not been configured on the partition.
    • Active - EDLM policies are configured and running.
    • Paused - EDLM scanning is paused.

The New column contains an Active/Paused button. The button toggles between modes.

1. 2. To change the mode from Active to Paused or from Paused to Active, click the button in the New column, and then click Apply.

The operation completes and, if successful, a Success message appears.

1. 3. Click Close to close the Success message.

See also:

• Working With Partitions
• Changing Partitions Access
• Deleting Partitions
• Automatically Creating Partitions
• Manually Creating Partitions