General Installation Guidelines; Hard Drive - Dell Dimension YH242 Owner's Manual

General Installation Guidelines

Connect the hard drives to the connectors labeled "SATA0" and "SATA1", starting with SATA0. Connect
CD/DVD drives to the connectors labeled "SATA4" or "SATA5", starting with SATA4.
Serial ATA hard drives and CD/DVD drives are connected to the connectors labeled "SATA0" to "SATA5"
on the system board.
When connecting and disconnecting a serial ATA cable, hold the cable by the connector at each end.

Hard Drive

CAUTION:
Before you perform any of the procedures in this section, follow the safety instructions in the Product
Information Guide.
CAUTION:
To guard against electrical shock, always unplug your computer from the electrical outlet before
opening the cover.
NOTICE:
To avoid damage to the drive, do not set it on a hard surface. Instead, set the drive on a surface, such as
a foam pad, that will sufficiently cushion it.
If you are replacing a hard drive that contains data, back up your files before you begin this procedure
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Removing and Installing Parts