On 8/6/21 11:37 AM, Chuck Guzis via cctalk wrote: > > IBM 3490 - 36 track. The 3590 and later get silly numbers of tracks on > half-inch tapes. Don't know if the 18-track 3480 was MR, however. >
According to this report: https://www.govinfo.gov/content/pkg/GOVPUB-C13-8243628c307c697d4f7e3ab72875e8cd/pdf/GOVPUB-C13-8243628c307c697d4f7e3ab72875e8cd.pdf the 3480 18-track head is indeed MR read, thin-film write. --Chuck
