HP ProLiant BL45p Server series - Manual (Page 39)

Hardware options installation 39
1. Remove the hard drive blank.
NOTE: Port-colored items indicate hot-plug components.
2. Install the hard drive.
3. Determine the status of the hard drive from the hot-plug hard drive LEDs
("Hot-plug SCSI hard drive LED combinations" on page 10 ).
4. Resume normal server operations.