4 ms·

360K disks also last longer than 1.2M. Nearly all of my HeathKit Z89 disks from ‘79 are perfectly fine, and only a handful of 1.2M disks from the mid-80s are o

360K disks also last longer than 1.2M. Nearly all of my HeathKit Z89 disks from ‘79 are perfectly fine, and only a handful of 1.2M disks from the mid-80s are okay.