IBM DS 3500 with vSphere 5.0.x SATP Rules
Few days ago, I went to a customer that has old Virtual Environment. He has 3 hosts IBM SystemX servers, IBM DS3524 SAS Storage which is directly SAS-attached to the hosts and vSphere 5.0 U2. His environment has strange issue: every few minutes, Storage Manager throws an error that “LUN x is owned by not-preferred Controller. Preferred Controllers is Controller A”. He first thought that it was a firmware issue in the DS3524 storage and he asked IBM guys to upgrade the storage firmware. They upgraded the firmware to version 7.86.49 and the problem was still there. First, I checked compatibility matrix of both VMware and IBM and I was shocked that they were different as the following screenshots: VMware one […]