SharePoint - Search Admin
In the event of a server death, you may need to move your Search Admin to another server.
This is actually fairly easy:
$searchapp = Get-SPEnterpriseSearchServiceApplication "Sample Search Service Application"
$admin = Get-SPEnterpriseSearchAdministrationComponent -SearchApplication $searchapp
$admin | Set-SPEnterpriseSearchAdministrationComponent -SearchServiceInstance NewServerName –Force
But once you have moved Admin, your crawlers may not run until you also do this:
Suspend-SPEnterpriseSearchServiceApplication $searchapp
Resume-SPEnterpriseSearchServiceApplication $searchapp