I was troubleshooting storage related problems at a customer site for some time. We run into massive ESXi storage connection problems after installing a new array. Interestingly enough problems occurred on already existing storage a few hours after new array was installed. Because searching for root cause took some time, I thought it is worth to share.



![How do IO Limits look like [update: SIOC v1, v2]](https://vnote42.net/wp-content/uploads/2018/09/pexels-photo-1645241-300x250.jpeg)


