The server is VMware ESX4.1, the storage is S2600. After we configure CHAP in array, we can connect the server to array and operate LUN without configure CHAP in server. This phenomena is not reasonable.
1. Check the array's configuration again and again.
2. We have find the array by host before we use CHAP. Clear all the LUN in VCENTER, we try to find it again but failed. We must configure CHAP. So we prove this point: It works or not depends on the order of find and certification.
1.There are some problem in array’s CHAP configuration, maybe CHAP doesn’t work after load to initiator.
2.The array find the VMware ESX system for first time by CHAP. It will not work for the array which has been found. It works or not depends on the order of find and certification.