| Mus.Cat. NEWUC:2004.39 | Mnfctr: Western Digital | Date: 09 JAN 2000 | Ser. No: WM678 084 2153 | Model: WD Caviar 136AA |
| Comp: Disk Drive | Length: 146 mm | Width: 101 mm | Depth: 25 mm | Weight: 457 g |
The developement of disk storage since 1984 has been phenomenal, and this web page touches on just a few
aspects relating to some of the artifacts in the collection.
There is much more not in the collection and there is much more by way of explanation.
I cannot emphasise how interesting and informative I found SCOTT MUELLER'S UPGRADING AND REPAIRING PCs.
The geometry of this disk drive is a rotary voice coil actuator the same as the Jujitsu drive in 1985, 15 years earlier.
One big difference is that there is only one voice coil winding and one magnet.
And this magnet is something again. Take the drive apart, break out the magnet, and be careful!
The magnet and its keeper can trap your skin. This is another aspect of disk drive development
the development of magnetic materials
That is a reflection of me in the disk surface taking the photograph.
A closeup of a head.,
The four arms and two platters is the most common configuration these days. (2008)
Closeup shows 4 conductors per head. Why?
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