ESXi host loses connectivity to IBM storage

After a few incidents recently with clients using IBM storage, I thought I would write this quick post to remind people that ATS Heartbeats on IBM Storage arrays should be disabled to avoid possible outages due to the ESXi hosts losing connectivity to their datastores. The issue relates to VMware ESXi 6.5, 6.0 and 5.5 using VMFS 3 and VMFS 5 datastores

The issue only happens in certain conditions so I advise that you read and action and

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