Speaking of drives. The hard drives I dealt with were on spindles with so many individual platters. Sometimes just one, up to 8 or so. When you "swapped platters", you took a plastic case that screwed onto the top of the spindle and you pulled the whole thing out, then screwed another spindle in.
Once in a while, you had to align the heads using a scope, being careful not to let your tie slip into the spinning platter while you nudged the heads by hand. Of course, you did clean your platters regularly, right?
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