Thank you Nicolai, I see the article, and i read also the point 13 and 14 at the end of the page, that they say:
13. Larger numbers are possible, depending on testing and support by the specific hardware vendor. For example, EMC supports up to 8,192 device paths on Red Hat Enterprise Linux 5. Consult your hardware vendor to determine their limit, and confirm with your Red Hat support representative. In no case will Red Hat support a limit that exceeds the limit supported by the hardware vendor.
14. It may be necessary to increase certain driver parameters to reach these limits. Consult with your Red Hat support representative.
So now I would like understand, what is my hardware vendor ? and what is the limit setted by default ?? I m speaking about a new Appliance 5240, do you think that I can ask to Veritas via Case ??
NB. Thank you @Marianne for your advisory