We will be upgrading the Oracle SL8500 tape library firmware in building 513 to a new major version (already tested for ~1 month in b. 613) as well as installing more recent hardware controller cards.

During the intervention, CASTOR read requests to tapes in this library will be delayed; writing to CASTOR will not be affected as write requests will be transparently redirected to other libraries.  

To check if a given file will potentially be affected you can use the commands:  

• nsls -T /castor/cern.ch/.../filename   to find out the tapename (3rd column)
• vmgrlistatape -V tapename   to retrieve the library name (3rd column).

If the library name is 'SL8500_1' or 'SL8500_C',  please note that your file might be affected by the intervention.