Hello,
I recently bought a Quantum Scalar50 with 76 slots and 2 LTO-4 drivs. These are 
two Scalar50 units connected together, drives go to the bottom unit and the 
other unit serves as extra slots.
mtx is 1.3.12, OS is CentOS 5.3

At first, mtx-changer (bacula 3.0.1) didn't recognize most the slots because 72 
of them are marked as IMPORT/EXPORT except for the first 4:
Data Transfer Element 0:Full (Unknown Storage Element Loaded):VolumeTag = 
ACW964L4                        
Data Transfer Element 1:Empty
      Storage Element 1:Empty
      Storage Element 2:Full :VolumeTag=ACW971L4                        
      Storage Element 3:Empty
      Storage Element 4:Empty
      Storage Element 5 IMPORT/EXPORT:Empty
      Storage Element 6 IMPORT/EXPORT:Full :VolumeTag=ACW970L4                  
      
...
      Storage Element 74 IMPORT/EXPORT:Full :VolumeTag=ACW974L4                 
       
      Storage Element 75 IMPORT/EXPORT:Full :VolumeTag=ACW973L4                 
       
      Storage Element 76 IMPORT/EXPORT:Full :VolumeTag=ACW972L4   

After changing the mtx-changer script to ignore the IMPORT/EXPORT I realized 
that the tape doesn't keep correct track of the loaded slot: 
If the slot gets loaded to a drive directly from an I/E slot (slot >4) then it 
is reported as coming from a random free non-I/E slot (1-4) if an empty I/E 
slot is found. If all slots 1-4 were full it is reported as "Unknown storage 
element"

Issuing "label barcodes" fails because bacula thinks drive0 with the "unknown" 
element is empty. I fear that if i modify mtx-changer more to trick it in 
seeing the unknown element as a random "empty" slot number, something will 
break in bacula. 

Is there a way to make bacula keep track of tapes using just barcodes and 
ignore slots?

Any more thoughts?

thank you,

Spiros Ioannou
Hellenic National Audiovisual Archive

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