1.9.3-p392 :026 > s
 => "DB2:/XMETA/NODE0000/DB2LOG" 
1.9.3-p392 :028 > /^([^\/]*\/[^\/]*\/).*$/.match(s)
 => #<MatchData "DB2:/XMETA/NODE0000/DB2LOG" 1:"DB2:/XMETA/"> 
1.9.3-p392 :030 > /^([^\/]*\/[^\/]*)\/.*$/.match(s)
 => #<MatchData "DB2:/XMETA/NODE0000/DB2LOG" 1:"DB2:/XMETA">