Alcatel-Lucent 7210 SAS M Interface Configuration Manual page 96

Interface Configuration
2. This step is required only if the platform supports use of physical MDAs, like the 7210
SAS-M. It is not required on platforms that do not support an MDA, like 7210 SAS-X,
7210 SAS-T, 7210 SAS-R6 and 7210 SAS-R12. 7210 SAS-Mxp does not have a
expansion slot (and hence does not support MDA.
7210 SAS M, T, X, R6, R12, Mxp Interface Configuration Guide Page 91