All the files that are replaced by a patch are stored under
/var/sadm/patch/<patch-id>/save so the patch can be safely
backed out. Newer patches will save the old files
under /var/sadm/pkg/<pkg>/save/<patch-id>/undo.Z, for each package
You can remove the <patchdir>/save directory provided you also
remove the <patchdir>/.oldfilessaved file. Newer patches will not
install a .oldfilessaved file.
Alternatively, you can install a patch w/o saving the old
files by using the "-d" flag to installpatch.
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