ɪn ðiːz kˈeɪsᵻz ɐ kəmpjˈuːɾɚ kæn ˈɔfən bˈiː "ɹˌiːdᵻɹˈɛktᵻd" tə bˈuːt fɹʌm ɐ jˌuːˌɛsbˈiː dɪvˈaɪs θɹuː jˈuːs əvən ɪnˈɪʃəl bˈuːɾəbəl sˌiːdˈiː ɔːɹ flˈɑːpi dˈɪsk.
In these cases a computer can often be "redirected" to boot from a USB device through use of an initial bootable CD or floppy disk.