| Anatomy of a Hard Disk Drive |
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$ Check REAL-TIME pricing for Seagate Barracuda 7200.12 SATA 3Gb/s 3.5-inch 1TB Internal Hard Drive ST31000528AS 7200RPM 32MB Cache RoHS Compliant Inter $ |
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| Spindle Motor |
On Figure 6 we show the H.DA after we removed the logic board. There you can clearly see the spindle motor and its contacts – which connect this motor to the logic board –, and also the contacts from the devices inside the HDA, namely the heads and the voice coil actuators.
click to enlarge
Figure 6: HDA without the logic board.
On hard drives targeted to desktops, the spindle motor rotates at 5,400 rpm, 7,200 rpm or even 10,000 rpm, depending on the drive. The faster this motor rotates, the faster data can be read from the platters. Hard drives targeted to laptops usually rotates at 4,200 rpm. |
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