Teardown: Western Digital Caviar 2000Posted: October 6, 2010
In addition to the Seagate I took apart, I had two Western Digital 200G drives that I was using in my HighPoint RAID controller. They’d been in service for over five years and were working the day I removed them for 1T drives. It was later a frustrating moment when I wanted to use the drives in enclosures for scratch purposes—neither drive would spin up! I’ve usually been able to repurpose old internal drives for external enclosures but not these. I still have fewer enclosures than I need (and a brand new Samsung drive with no place to go for the moment.) Above, you’re looking at the main mounting plate of the drive. You can see the head arm, and its reflection on the drive platter, through an access hole that is normally covered by a sticker (“removal of stickers voids warranty”, goes the label on many drives.)
Here’s Western Digital’s controller board. With the ubiquitous Samsung 32M cache memory. The controller chip is in the center—it is a Marvell chip, hat tip to this semiconductor logo page. The flash obscures the chip in the lower left, but it is also an ST Microelectronics SMOOTH motor controller. The DIP-like contacts in the upper left couple to the head assembly through a bulkhead connector. The lower-right contacts near the SMOOTH chip are for the platter motor.
The cover’s off. This wasn’t as nice a picture as the Seagate—there’s already dust on it, and I only had it off for a minute when I snapped this image! I will never do clean room work in my building, that is for damned certain.
I got the platters and the heads off. You can see the other side of the bulkhead connector I pointed out previously. Unlike the Seagate, Western Digital drives only need one Torx T2 driver to disassemble; I had quite the collection of bits used in disassembling the former.
The heads. I mashed one pair getting them off the platter but I still got a good picture:
Another picture of the heads:
It’s interesting that my Seagate has a full head arm but not all of the heads (it had 2 platters and was made for 4.)
Fortunately for my electronics, I have run out of things to tear down. For now.