They do use 3.5 inch disks; this is a misstatement: “SFMTA's train control system relies every morning on 5 inch floppy disks.” The SFMTA Board presentation jus

They do use 3.5 inch disks; this is a misstatement: “SFMTA's train control system relies every morning on 5 inch floppy disks.” The SFMTA Board presentation justifying the >$600M upgrade shows a photo of the real 3.5 inch floppy disks in use that were written in 2021. https://www.sfmta.com/sites/default/files/reports-and-documents/2023/11/11-7-23_mtab_item_11_train_control_upgrade_project_consultant_rfp_-_slide_presentation.pdf#page=3 https://www.sfmta.com/sites/default/files/reports-and-docume...