Actually, the term
stiction was invented for a particular problem with a particular set of
hard drives. Back in around
1990 (gah! I'm old!) a several-month run of 80-
megabyte internal 3.5" drives from
Quantum began to exhibit a particular
design flaw. Apparently, a
lubricant used inside the drive could (and in many cases, did) drip down onto the
spindle where it passed through a metal plate. The
droplet would then
congeal slightly when the drive was turned off and had cooled (drives operate at fairly high temperatures). Hard drive
motors are designed for extremely high speed and not for any variation in
resistance; as a result, the motors didn't have the
torque required to 'break' the bit of
lube and
spin up the drive.
This problem might not have come to the attention of the computing world to the level it did had not one of the largest customers of those drive mechanisms been Apple Computer, to put in its Macintoshes. Mac users, as the world has found, are a particularly outspoken bunch with a strong sense of community, and eventually, a recall order was issued such that dealers would replace such drives free of charge if they were brought in.
The most common placement of these units was in the Macintosh SE, SE/30 and Mac II machines (II,IIx,IIcx). As a result, many Mac-savvy tech support personnel got used to saying to clients "Okay, try this. You have an SE? Reach around the right side of the machine, just below the level of the floppy slot, and give it a good thwack with the heel of your hand. Then turn it on and see what happens." (pause) "Great. Yup, I'm psychic - I could hear your Mac calling for the massage. Really." Or: "You have a Mac II? Okay, pick up the right side of the machine about three inches and drop it back onto the desk. Now boot it."
Many users, I found, gleefully accepted the instruction to smack their computer. Their relief and almost smug joy when it actually worked made the whole debacle easier to bear.