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v Module bays must be occupied at all times.
To help ensure proper cooling, performance, and system reliability, make sure
that each of the module bays on the rear of the BladeCenter unit has a module
or filler module installed.
Important: When replacing a module, do not operate the BladeCenter unit for
more than one minute without either a module or a filler module installed in each
module bay.
v There is no power switch on the BladeCenter unit.
The BladeCenter unit does not have a power switch. Plugging the power cords
into the power modules and a 220 V ac power source (rack-mounted 220-volt
PDU) starts the BladeCenter unit (the management module, I/O modules, and
blowers start running).
Each blade server in the BladeCenter unit has an individual power-control button
behind the control-panel door on the blade front that turns on or turns off the
blade server. Be sure to shut down the operating system before turning off the
blade server, to avoid damaging the hard disk drives.
Notes:
1. The blade server power button turns on or turns off the blade server if local
power control has not been disabled through the management module.
2. The blade server power button turns on the blade server only if the green
power light on the blade server is flashing slowly. If the light flashes rapidly,
the blade server has not yet synchronized with the management module, and
the power button will have no effect.
See the IBM BladeCenter Type 8677 Installation and User’s Guide for more
information about the BladeCenter unit. See the Installation and User’s Guide for
your blade server for more information about the blade server power controls and
turning on or turning off the blade server.
v The removable media drives are detected as a Universal Serial Bus (USB)
device
The removable media drives in the BladeCenter unit are viewed as a USB
devices by the operating system in the blade server. Make sure that your
operating system provides USB support.
v Hot-swap capabilities
The front bays on the BladeCenter unit are hot-swap blade bays; the rear bays
on the BladeCenter unit are hot-swap module bays. You can add, remove, or
replace blade servers or management, I/O, power, or blower modules in
hot-swap bays without removing power from the BladeCenter unit.
Attention: To maintain proper system cooling, each unoccupied bay must
contain a filler blade and an expansion or filler module. When replacing a blade
server or installing an expansion option, do not operate the BladeCenter unit for
more than one minute without either a blade server, an expansion option, or a
filler blade installed in each blade bay or without a module or filler installed in
each rear bay.
18 BladeCenter E Type 8677 and 1881: Hardware Maintenance Manual and Troubleshooting Guide