How to Manage Media using a Robotic Library with Bar Code Reader in Backup Exec 11d and above

Article:TECH4948  |  Created: 2010-01-03  |  Updated: 2012-02-22  |  Article URL http://www.symantec.com/docs/TECH4948
Article Type
Technical Solution

Product(s)

Issue



How to Manage Media using a Robotic Library with Bar Code Reader in Backup Exec 11d and above


Solution



The inventory function is essential to media management in any robotic library. This is also true for robotic libraries with bar code readers. In some cases, an inventory can be supplemented with the Initialize and Scan operations in order for the media server to use the media provided.

An inventory must be performed on any media that has never been introduced to the media server.  

When using new media with a robotic library, perform the following:

1. Add the tapes to the loader using the Import command if applicable, or use the Unlock command to access the robotic library and add media.

2. First Initialize by right clicking on the Medium changer and selecting the Initialize option (Figure 1).

Figure 1.
 

 
3. After the Initialization has been completed, perform a scan. The slots can be scanned by right clicking the slots and selecting the Scan option from within the Devices tab of the media server (Figure 2).

Figure 2.
 

4. Run an Inventory any slots with new media.

Note:  The tape should now be shown as blank media under the Devices tab, the Media tab, and All Media

Alternately, if the media is in an unrecognizable format, perform the following:

1. Add the tapes to the loader. Use the Import command if applicable, or use the Unlock command to access the robotic library and add media.
2. First run an Initialize and then a Scan from within the Devices tab of the media server.
3. Right-click on the slot which has the new media and select Erase

If the tape is from another installation of Backup Exec or another compatible software product:

1. First run an Initialize and then a Scan from within the Devices tab of the media server

2. After this has been completed, right-click on Slots and run an inventory.

 
Note: This will force a "read" of the tape header. This is necessary because when an Initialize and a Scan are run, only the "Bar Code label" will be read by the library and then put into its internal memory. This label will be transferred to Backup Exec. This will not be enough to allow Backup Exec to access this tape, as the "Tape Header" has not been entered into the Physical Volume Library (PVL) or media database within Backup Exec. If a tape header has not been entered into the database, then Backup Exec will not be able to write data to this tape.
 

If the tape is from the same media server and the bar code label has not been changed:

This is the only time an inventory can be supplemented with an Initialize and Scan operation. The media server already has the "header" information in the Physical Volume Library (PVL), therefore an inventory to process the tape header information is not necessary.


More information:

When a new tape with a bar code is entered into a library, Backup Exec has not "written" a header to the tape itself. Without this header, Backup Exec is not able to write to the tape. Once a tape has been written to with Backup Exec, an inventory is not normally required. When introducing a new tape or blank media to the robotic library, run Initialize and Scan, then use the "quick erase" feature to erase the tape so Backup Exec can write a new header to the tape.

Warning: Performing an erase or quick erase on media will result in loss of any information that may have been written to the media previously.  


The primary key in the data file for the media is normally keyed to the Global Unique ID (GUID) that Windows NT gives each tape. The first time that Backup Exec sees the tape when a bar code reader is used, it takes the bar code and puts it into the field where the GUID usually resides. The bar code information is not replaced with overwrite operations as the standard GUID would be if a bar code label was not present.

When a bar code reader is used with a robotic library, all of the tapes are identified by the bar code ID and not the GUID normally assigned by Backup Exec.

 



Legacy ID



190875


Article URL http://www.symantec.com/docs/TECH4948


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