Preparation Procedures; Hot-Pluggable Parts; Non-Hot-Pluggable Parts - Compaq ProLiant ML570 Maintenance And Service Manual

2-4 Compaq ProLiant ML570 Maintenance and Service Guide

Preparation Procedures

The system power in the ProLiant ML570 server does not completely power down with the
front panel Power On/Standby switch. The switch toggles between On and Standby, rather than
On and Off. The Standby position removes power from most electronics and the drives, but
portions of the power supply and some internal circuitry remain active. To completely remove
all power from the system, you must disconnect all power cords from the server. For more
information about removing power from the system, see "Powering Down the Server" later in
this chapter. See "Server Warnings and Precautions" later in this chapter for further safety
information.
IMPORTANT: Before beginning to remove any serviceable part, determine whether the part is
hot-pluggable or non-hot-pluggable. Hot-pluggable devices in the ProLiant ML570 server include SCSI
hard drives, fans, and power supplies.

Hot-Pluggable Parts

If the part is hot-pluggable, do not perform a power shutdown of the server. The access panel
can be removed without causing system shutdown. Hot-pluggable devices in the
ProLiant ML570 server includes Wide Ultra2 and Ultra3 SCSI hard drives, some expansion
boards, fans, and power supplies.
IMPORTANT: It is not necessary to power down the server to replace hot-pluggable devices such as
power supplies, fans, or PCI Hot Plug boards when they are not in active use.

Non-Hot-Pluggable Parts

If the part is non-hot-pluggable, the server must be shut down. Non-hot-pluggable parts include
the processors, some expansion boards, DIMMs, and drive cages. See "Powering Down the
Server" later in this chapter for complete powering down instructions.
WARNING: To reduce the risk of personal injury or damage to the equipment, the installation
of options other than hot-pluggable power devices should be performed only by individuals who
are qualified in servicing computer equipment and trained to deal with products capable of
producing hazardous energy levels.
WARNING: To reduce the risk of personal injury or damage to the equipment when moving the
server, be sure that:
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The access panel is securely fastened to the chassis.
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You do not use the electronics drawer handle to move the unit.
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You do not use the rack-mount bezel handles to move the unit.