Skip to main content
NetApp Knowledge Base

E-Series How to map LSI/Avago based SAS adapters in Auto port mode

Last Updated:

Applies to

  • E-Series
  • LSI Avago SAS based Host Bus Adapters


SAS based hosts can lose the data path to the array due to SAS ports to change and to come up in different order.

  • Each SAS port exist of four single ports, each port has it's own SAS address. Two SAS ports form a Wide port.
  • SAS HBA's should operate in Wide mode by default but native SAS LSI/Avago Host Bus Adapters (HBA) operate in default Auto port mode instead. Therefore the SAS address is dynamically set based on the which port PHY link is established first. This is not the case for SAS HBA's operating in Wide port mode
  • This causes indicator to host mapping to fail as the mapping is based on the SAS port address.

Here is an example:

500605b003885d21    Correct SAS address
500605b003885d22    New SAS address after the host has rebooted, link down
-> tditnall 0
 tditn Ch : Location      Device Name                        Port Name : Open  Completed  Errs :          Ms           Ms
------ -- :--------- ---------------- -------------------------------- :----- ---------- ----- :------------ ------------
     1  2 :       Am 50080e543e158014                 50080e543e158014 :    0      49854     0 :        2774     85940789
     2  5 :       Am 50080e543e158024                 50080e543e158024 :    0      50137     0 :        2846     85940718
     3  6 :       Am 50080e543e158026                 50080e543e158026 :    0          0     0 :           0     85943564
     4  4 :    barn2 500605b003885d21                 500605b003885d21 :    0    2804119     0 :     1790932      4714346   
     5  4 :       Am 50080e543e158020                 50080e543e158020 :    0          0     0 :           0     85943564
  -< 6  4 :Host_5006 500605b003885d22                 500605b003885d22 :    0          1     0 :           0       86606  


Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.