Answer Posted / azhar ali khan

1)Check number of controlfiles.
SQL>select name from v$controlfile.
Suppose there are two controlfiles,control01.ctl and control02.ctl.Check the path of controlfiles.
SQL>Shut immediate.
Go to the controfile location.
$ls
control01.ctl control02.ctl
$cp control01.ctl control03.ctl
$ls
control01.ctl control02.ctl control03.ctl

Now open parameter file init<sid>.ora .
$vi init<sid>.ora
control_files='/home/..../control01.ctl','/home/.../control02.ctl','/home/...../control03.ctl'

save and quit
SQL>startup
SQL>Now check the name and path of controfiles.

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