I have 2 identical server with exact disk partitions (OS CENTOS 6.4 both ) [My college central oracle server].Entire ORACLE HOME ( bin , control files, data files everything on oracle) is on 2nd Disk (which is not a OS disk)Since OLD server had reached end of life (from HP) a new HP machine with upgraded RAM (OLD system had 16 GIG where as new system as 64 GIG).Now Since All oracle Dependencies (RPM, libraries, environmental variables, JAVA, Users and groups) are already made on new server.So Now Question is ..Can I remove Disk [Oracle HDD] from OLD server and insert it on NEW server and just start Oracle (sqlplus / as sysdba or dbstart and lnsctrl).Can it will give any challenge.(I have cold backups, export backup, & RMAN backup too).I just want to give a try on above case.Will this work ?? 
Move Complete ORACLE from one system to another
centos;database