Dear Sirs:
I have a single chassis of FAS2720 (two nodes with HA).
FAS2720 HW description
1. two nodes (two controllers) with HA.
2. No attached extension disk shelf.
3. no SAS-extension port (0a,0b) cable connected. For empty status on each 0a,0b SAS-ports.
When I check the sysconfig -a on admin mode, the output is shown as "Single-Path".
Of course, there is no cross-connection between controller_A and controller_B on base system chassis's SAS ports.
The SAS path redundancy is single-path.
if there is a disk shelf installed on this FAS2720, the SAS path redundancy should be Multi-Path.
I think that the backend of the chassis connection is connected with controller A/B.
Question 1. Is it normal or abnormal status?
Question 2. if there is controller failover/takeover operation, is there another issue with the loss of the disk path because of the single-path condition?
Someone told me the SAS cable should be connected between controller_A's ports and controller_B's ports under the cross-connection rule.
e.g. > Connect between controller_A's 0a and controller_B's 0b and connect between controller_A's 0b and controller_B's 0a.
Please let me know if you have any tips or formal documents.
Kind Regards!
SangKyun, Hong
