diff --git a/perl-xCAT/xCAT/Schema.pm b/perl-xCAT/xCAT/Schema.pm
index 800481808..055c2df86 100755
--- a/perl-xCAT/xCAT/Schema.pm
+++ b/perl-xCAT/xCAT/Schema.pm
@@ -761,7 +761,7 @@ linuximage  => {
   otherpkgdir => 'The base directory where the non-distro packages are stored.', 
   exlist => 'The fully qualified name of the file that stores the file names and directory names that will be excluded from the image during packimage command.  It is used for diskless image only.',
   postinstall => 'The fully qualified name of the script file that will be run at the end of the genimage command. It is used for diskless image only.',
-  rootimgdir => 'The directory name where the image is stored.  It is used for diskless image only.',
+  rootimgdir => 'The directory name where the image is stored.  It is generally used for diskless image. it also can be used in sysclone environment to specify where the image captured from golden client is stored. in sysclone environment, rootimgdir is generally assigned to some default value by xcat, but you can specify your own store directory. just one thing need to be noticed, wherever you save the image, the name of last level directory must be the name of image. for example, if your image name is testimage and you want to save this image under home directoy, rootimgdir should be assigned to value /home/testimage/',
   kerneldir => 'The directory name where the 3rd-party kernel is stored. It is used for diskless image only.',
   nodebootif => 'The network interface the stateless/statelite node will boot over (e.g. eth0)',
   otherifce => 'Other network interfaces (e.g. eth1) in the image that should be configured via DHCP',