What is a 1920 and why is it happening?

Hello friends. For the next few weeks (while I am in a dry spell for post ideas) I am going to do a series of posts that are frequently asked questions I get from some of my peer support agents as well as others I interact with day-to-day. For the first go-around we will discuss remote copy. Specifically, what exactly is a 1920 error? How do I identify the cause of the error and stop it from happening again?
A 1920 error is a cluster error indicating that the software in the master cluster of a remote copy relationship has decided to kill remote copy for a particular relationship (and its associated consistency group) because the SLA of remote copy was violated as defined in the partnership settings.
The first and probably most important thing to know is what that SLA is and how it is defined. For this, go ahead and run lspartnership against your remote copy partnership (or check partnership properties in gui... your call). If you run lspartnersip you will see something like this:
svci…
A 1920 error is a cluster error indicating that the software in the master cluster of a remote copy relationship has decided to kill remote copy for a particular relationship (and its associated consistency group) because the SLA of remote copy was violated as defined in the partnership settings.
The first and probably most important thing to know is what that SLA is and how it is defined. For this, go ahead and run lspartnership against your remote copy partnership (or check partnership properties in gui... your call). If you run lspartnersip you will see something like this:
svci…