HP Compaq d530 SFF Hardware Reference Manual page 40

Hardware Upgrades
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11. Connect the opposite end of the data cable to the appropriate
system board connector.
If your system has only one SATA hard drive, you must connect the
hard drive to the connector labeled SATA 0 first to avoid any hard
drive performance problems.
Hard Drive Connector Locations
SATA hard drive connector
1
PATA hard drive connector
2
When replacing the hard drive, transfer the four screws from the old
drive to the new one. The screws take the place of drive rails. You will
need a Torx T-15 screwdriver to remove and re-install the guide
screws.
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