HP EX475 MediaSmart Server - Manual (Page 88)

Using the Server Version Update 1.1.1 6-10
To connect an external USB disk drive
If you use a USB disk drive, it is recommended that you use a drive that
conforms to USB 2.0 or later.
1 Plug in the USB cable into one of the USB ports on the server.
2 To plug in and power up your external USB drive, see the documentation
that came with your USB disk drive.
Caution: The addition of multiple USB disk drives through an external USB
hub is neither recommended nor supported.
Figure 33: Connecting a USB disk drive to HP MediaSmart Server
To connect an eSATA disk drive or SATA port multiplier
1 Plug in the Serial ATA cable into the eSATA port on the back of the server,
as shown in the following figure.
2 To plug in and power up your eSATA disk drive or SATA port multiplier,
see the documentation that came with your device.