Always use the bmrsrtadm command to install patches and packages into Solaris SRTs. The bmrsrtadm command prevents any damage from the packages that do not support the pkgadd -R flag.
Patches that are installed into the miniroot that do not support the patchadd -C flag can damage BMR boot servers as well as JumpStart servers. Therefore, do not install the patches into an SRT that do not support the patchadd -C flag.