Hard Disk Drives

How does a second hard drive in a computer work?

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Wiki User
2015-12-23 01:42:24

Overall, a secondary hard drive works the same as a primary hard

drive. In the case of PATA drives, the secondary hard drive

operates as a "slave" drive. It disables its controller and lets

the primary hard drive control it. This is determined by jumper

settings on both drives and/or the cable position.

While SATA drives are modeled after PATA drives, SATA drives

operate on independent channels, and thus every SATA drive is a

"master" drive. Their order or addressing are all dependent upon

which socket they are plugged into.

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