When installing CA LDAP Server via CSM , the install wizard requests an OMVS path to use for the install.
The easiest way to do this would be to mount an HFS file at the runtime directory location
for example with a mountpoint at /u/user/ldapr15.
then create another directory at /u/users/ldapr151/CA
During the installation the wizard will asked for the installation directory - you would reply /u/users/ldapr151/CA
CA LDAP Server would then be installed in the /u/user/ldapr151 runtime directory - on an HFS file system.