HP d325 ST Hardware Reference Manual page 42

Hardware Upgrades
Bay
Depending on the computer configuration, the 3.5-inch drive bay on the left side of
the computer may be configured with a diskette drive or it may be an empty drive
bay. The type of bezel covering the drive bay will vary depending on the original
computer configuration.
If the computer was not configured with the optional diskette drive, you can install a
3.5-inch device, such as a diskette drive or hard drive, into the drive bay at any time.
The type of bezel you need will depend on the type of device you plan to install. If
you are installing a diskette drive, you must install a diskette drive bezel (PN 316002-
001). If you are installing a hard drive, you must install a bezel blank (PN 316006-
001). If you are installing a 3.5-inch device other than a diskette drive or hard drive,
you must install the 3.5-inch device bezel (PN 316008-001). Contact an authorized
HP reseller or service provider to order the appropriate bezel when reconfiguring the
computer.
To install a secondary hard drive, you must use a dual-headed cable (part number
108950-051).
2-30 Hardware Reference Guide