Keith Lucas

I'm assuming that trimming the filesystem will effectively mark blocks as "don't care" blocks, i.e. the file system isn't using them and if it uses them in the future it...

The longhorn-engine-manager nodes need to be able to communicate with the longhorn-replica-manager node over TCP ports 10000-30000.

I don't know if there is a scenario in which we generate the error [here ](https://github.com/longhorn/longhorn-manager/blob/ac065a8deb96193ffec142bcc7e7345615b57b8d/controller/volume_controller.go#L869) and this is actually the case that we are trying to start the longhorn...