These formats both allow you to specify a path to an ISO where the CD is, rather than a block device. It'll scan block devices, mount them, then look for the specified filename and mount it loopback.
findiso= is Debian's format, iso-scan/filename= is Ubuntu's.
These formats both allow you to specify a path to an ISO where the CD is, rather than a block device. It'll scan block devices, mount them, then look for the specified filename and mount it loopback.
findiso= is Debian's format, iso-scan/filename= is Ubuntu's.