Data recover upon node crash

Hi,

I read in your documentation:

"Using failover on a live node (instead of using remove/rebalance) may introduce a small data-loss window as any data that has not yet been replicated may be lost when the failover takes place. You can still recover the data, but it will not be immediately available. "

I am having problems finding info on how to recover this data so could anybody point me in the right direction? Since we are talking about a crash of a live node the only place to access this data (which has not yet been replicated, be it to a node in the cluster or to another cluster with XDCR) is on the local disk of the node that crashed? Given that this disk is OK, how do I go about getting any changes which have not been replicated (how to identify those changes at all) into the live cluster again? Because, after I failover the crashed node, once I add it back it will erase the data as I understand it so this would have to be done somehow before adding it back to the cluster (or simply not add it back at all but a replacement server). Also, I assume that any data which has not been written to the disk (nor replicated) is defintely forever lost.

Appreciate any feedback on this,

Elfar