Filter
Top Products
Table 6. Troubleshooting charts (continued)
Device Suggested action
CD-ROM drive is not
recognized after being
switched back to blade server
running on Windows 2000
Advanced Server with SP3
applied.
When the CD-ROM drive is owned by blade server x, is switched to another blade
server, then is switched back to blade server x, the operating system in blade server
x no longer recognizes the CD-ROM drive. This happens when you have not safely
stopped the drives before switching ownership of the CD-ROM drive and USB ports
(media tray).
Note: Because the BladeCenter T unit uses a USB bus to communicate with the
media tray devices, switching ownership of the media tray to another blade server is
the same as unplugging a USB device. Before switching ownership of the CD-ROM
drive (media tray) to another blade server, safely stop the media tray devices on the
blade server that currently owns the media tray, as follows:
1. Double-click the Unplug or Eject Hardware icon in the Windows taskbar at the
bottom right of the screen.
2. Select USB Mass Storage Device and click Stop.
3. Click Close.
You
can now safely switch ownership of the media tray to another blade server.
CD-ROM problem. Replace the CD-ROM drive.
Ethernet controller problems
Operating systems number
Ethernet controllers
differently.
Enumeration of the Ethernet controllers in a blade server is operating-system
dependent. In the blade server Configuration/Setup Utility program, the Ethernet port
designated as Planar Ethernet 1 is routed to Ethernet switch module 2 and the
Ethernet port designated as Planar Ethernet 2 is routed to Ethernet switch module 1.
Verify the designations through your operating system settings or by testing:
1. Install only one switch module, in switch bay 1.
2. Enable only one of the Ethernet controllers on the blade server. Make note of the
designation the blade server operating system has for the controller.
3. Ping an external computer on the network connected to the switch module.
If
you can ping the external computer, the Ethernet controller you enabled is the
upper controller in the blade server and is associated with Ethernet switch 1.
Ethernet switch module problems
First ping from Ethernet
switch module through Telnet
reports failure.
When you use the Ethernet switch module Telnet interface to request the switch
module to ping something, the first ping response reports a failure, although the other
repetitions might report success. This occurs regardless of whether the switch module
port the pinged object is connected to is internal or external, and applies to pinging
blade servers but not to pinging the management module or objects connected to its
external Ethernet port, such as the network management station. To get accurate
results, always specify multiple repetitions (>1) in the ping request, and ignore the
first ping response from that request. See the IBM 4-Port Gb Ethernet Switch Module
for BladeCenter T Installation Guide for instructions on how to ping through the Telnet
interface.
Ethernet switch-module
firmware graphics shows a
blank panel when the blade
server is present but powered
off.
If the Wake-on-LAN (WOL) feature is disabled on a blade server, and the blade
server is turned off, the switch module internal port link to that blade is down. This is
not an error, but the graphic of the BladeCenter T unit might show a blank panel
instead of a blade server in that bay.
Note: You can enable or disable the WOL feature on a blade server through the
management-module Web interface or through the IBM Director console. Do not rely
on the BladeCenter T graphic in the Ethernet switch-module firmware Web interface
to determine the presence or absence of blade servers in the BladeCenter T unit.
Ethernet switch-module log
reports elapsed time, not time
of day.
The timestamp on entries in the Ethernet switch module log uses elapsed time (since
last switch restart). The timestamp on entries restarts from 0 each time the switch is
restarted, although the entries do remain in order of occurrence.
Chapter 6. Symptom-to-FRU index 93