Ian Gillan band, who had not had any holiday since their initial rehearsals at Hanwell. He started drinking, and relationships between him and the rest of the band became strained, particularly with Blackmore. On 6 November 1971, he collapsed with hepatitis while waiting to board a plane in Chicago, cancelling the remainder of a US tour. By December 1972, having recorded "Machine Head", "Made in Japan" and the yet to be released "Who Do We Think We Are" with Deep Purple, Gillan finally decided the workload had driven him to exhaustion. Unlike some band members, he was unhappy about "Made in Japan",
Ian Gillan appeared on the band's next two albums, "Double Trouble" and "Magic". In 1982, Ian Gillan announced the band would fold, as he needed to rest his damaged vocal cords. The rest of the band Gillan, particularly McCoy and Towns, were not happy at the sudden disbanding of the group so soon after the success of "Magic", and sued Gillan for royalties. In 1983, manager Don Arden invited Gillan to join Tony Iommi, Geezer Butler and Bill Ward, all founding members of Black Sabbath, to form a supergroup. Although the band had reservations, on 6 April 1983, it was formally announced