I recently had to change the disk that had the SharePoint Search Index inside and went into a little trouble doing that. Everything went ok but doing my research I found out that I can create a mirror of my Search Index that can work as a fail-over if something happens to the first.
Since I will be adding this mirror a long time after the first started storing index files, I am wondering if the mirror will collect all previous data from the first index partition or if it will only store new indexes.
In better words, by adding a mirror, will I automatically have a backup or do I need to run a full crawl to have everything on both partitions?
Thanks in advance.