Dell OptiPlex 755 - Manual (Page 156)

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User's Guide
Drives
Drives
Your computer supports:
l One SATA (serial ATA) hard drive
l One slimline floppy drive or media card reader
l One SATA slimline optical drive
l One eSATA drive
General Installation Guidelines
SATA connectors on the system board are labeled SATA0 and SATA1. Hard drives must be connected to SATA0, while any other SATA devices (like an optical
drive) must be connected to SATA1. For example, if you have a SATA hard drive and a SATA optical drive, connect the hard drive to the SATA0, and connect the
SATA optical drive to the SATA1 connector. (See
System Board Components for the location of the SATA connectors on the system board.)
Connecting Drive Cables
When you install a drive, you connect two cables (a DC power cable and a data interface cable) to the back of the drive.
Data Interface Connectors
1 3.5-inch drive bay for optional floppy drive or media card reader
2 slimline optical drive
3 hard drive
Serial ATA (SATA)
Connector
1 data interface cable connector
2 data interface connector