RPM files are also no longer reliably CPIO compatible. 99.999% are, but as CPIO doesn't allow file sizes larger than 4gb, creating such an RPM will use a custom

RPM files are also no longer reliably CPIO compatible. 99.999% are, but as CPIO doesn't allow file sizes larger than 4gb, creating such an RPM will use a custom archive scheme incompatible with CPIO. However, it's not particularly common practice to stuff a 4gb file into an RPM, so at least at the moment, it's not a very big practical issue.