Heh, I just recently opened up an old Micropolis drive to see if it was suffering from stuck heads. Didn't work anyway, so nothing to lose really. I did have to giggle quietly to myself when poking a screwdriver through the warranty seal sticker; somehow I don't see whoever ended up with Micropolis' assets honouring a warranty that probably expired about 20 years ago.I hope that one's the only one that you opened up the HDA on! That "Product warranty will be void..." sticker is there for a reason.
I've seen folk have been doing quite well at home with plastic boxes, fine filters and vacuum cleaners! Class 100 it ain't, but for a quick poke around when there's not much at stake: why not? You just need to remember to put all the tools you're going to need in the box before purging it...Your living room isn't exactly a Class 100 clean room...
Mike, why is this under the "PC" forum? To the best of my knowledge, no PC-compatible system ever used the ST506--and you certainly can't hook one to a 5160 controller without some ROM rework. The 506 uses an unbuffered seek, which almost no PC hard disk controller is set up to perform. I found that I was able to get an ST506 (the vendor was giving them away with every HDC purchase) by modifying the Xebec controller's internal drive tables, but it's hardly authentic.
The 5160 uses an ST412 interface and hosts a hulking 4MB--about 11 5.25" 360K floppies.
I think some Tandy systems used an ST506, as well some DEC systems.
It's not in the PC forum. It is in the 'Items For Sale or Trade' area, where I moved it to. (Are you looking at the redirect? That will expire in 2 or 3 days anyway.)
Even if it was PC specific, it is for sale or trade, not a question or topic about PCs.
Biggest problem I've seen with these drives is that
most machines that use them leave the heads sitting
on cylinder 0. The back edge of the heads are as sharp
as knife edges. The vibration of shipping causes them
to dig into the surface. This usually takes out two
or three cylinders.
They should always have the heads parked before shipping.
This requires spinning them up to speed and having the
heads moved past the last cylinder.
I've actually taken apart a couple of drives and swapped
platters to fix this problem. You can clearly see the damaged
I read that this generally was not a good idea because dust particles could get on the drive platter surfaces and lead to errors. However, today's drives have aural densities exponentially greater and smaller surface areas than these bricks. I guess using some compressed air would do the trick before putting the platters back together.
However, today's drives have aural densities exponentially greater and smaller surface areas than these bricks. I guess using some compressed air would do the trick before putting the platters back together.
I doubt it--a winchester drive still depends on the head flying at very low altitude. However, you can devise a "clean box" to work in without too much trouble.
What's "aural density"? I've heard some Second Viennese School music that was pretty dense aurally, but I've never seen the term used on disks.
what would be the price if I take 3 of them? I use them for low-level formatting in Apple Profiles.. I can check very quickly if they really work.. so what happens if I can not low level format a drive? I have formatted 30-40 ST-506 and ST-412.. nearly no drive I bought off ebay was really working (mostly I part them out from IBM XT's)...