IBM 88861TU Installation And User Manual page 22

DVD drive activity LED
DVD drive eject button
USB ports
Battery backup unit:
Battery backup units provide backup for SAS RAID controller modules cache.
Battery backup units are installed in the battery backup unit bays located in the
media tray when you install SAS RAID controller modules. The battery backup
unit in battery backup bay 1 provides backup support for the SAS RAID controller
module in I/O module bay 3; the battery backup unit in battery backup bay 2
provides backup support for the SAS RAID controller module in I/O module bay
4.
Note: Both battery backup units are required if you install SAS RAID controller
modules.
10
BladeCenter S Type 7779/8886: Installation and User's Guide
Power-on
Lit (green). Power is being supplied to the BladeCenter S chassis.
Off. The power subsystem, ac power, or the LED has failed.
Note: Even if the power-on LED is off, always remove the power
cords from all power modules before you service the BladeCenter S
chassis.
Location
Lit or flashing (blue). It has been turned on by the system
administrator to aid in visually locating the BladeCenter S chassis.
You can turn off the location LED throught the Web interface or
the IBM Director console.
Over-temperature
Lit (amber). The temperature in the BladeCenter S chassis exceeds
the temperature limits, or a blade server reports an
over-temperature condition. The BladeCenter S chassis might have
already taken corrective action, such as increasing the fan speed.
This LED turns off automatically when there is no longer an
over-temperature condition.
Information
Lit (amber). A noncritical event has occurred that requires
attention, such as the wrong I/O module being inserted into a bay,
or power demands within the BladeCenter S chassis exceeding the
capacity of the installed power modules.
You can turn off the information LED through the Web interface or
the IBM Director console.
System error
Lit (amber). A system error has occurred, such as a module failure
or a system error in a blade server. An LED on the failing
component is also lit to assist in isolating the error.
Lit (green). The drive is in use.
Press this button to open the DVD drive.
Connect USB devices to these ports.