====== Information an a DST-File ======

First you need to extract the production ID from the LFN or file-name of your file. 
In the file-name, the production ID is the number in front of the first _.
The file in the LFN below has production ID 22761.
<code>
LFN:/lhcb/LHCb/Collision11/CALIBRATION.DST/00022761/0000/00022761_00000037_1.calibration.dst
</code>

Once you have the production ID, you can get the related information with
<code>
SetupLHCbDirac
dirac-bookkeeping-production-informations <ProdID>
</code>

or in our example:
<code>
dirac-bookkeeping-production-informations 22761
</code>

Especially the path at the end of the print-out is very useful. 

===== Renamed Files =====
If your DST-file has been renamed, you need to determine the original file-name.
Root writes the original file-name into the DST file. 
You can print it using the following command:
<code>
head -1 <dst-file> | strings
</code>
(The ''1'' in ''-1'' is a the digit one, this tells ''head'' to print the first line only)

===== More =====
  * [[davinci:dbtags | Finding and using the correct DB tags]]