IBM 8677 - BladeCenter Rack-mountable - Power Supply Hardware Maintenance Manual And Troubleshooting Manual page 69

Table 2. Troubleshooting charts (continued)
Device
CD-ROM cannot be
configured with a JS20 blade
server but works with a HSxx
blade server.
Some components do not
report environmental status
(temperature, voltage).
Switching KVM control
between blade servers gives
USB device error.
"Unsafe Removal of Device"
error message appears on
blade server running
Microsoft Windows 2000.
"Media not found" error
message and other file
system error occur on a blade
server running Linux or DOS.
Suggested action
The customer interface card (FRU number 59P6629) is not compatible with the JS20
blade server and must be replaced with the latest level FRU.
Note: The customer interface card installed in the BladeCenter is listed as the
"media tray" instead of the "customer interface card" on the Hardware VPD view of
the management-module web interface. The FRU number is also printed on the
customer interface card. Replace the customer interface card with the latest level,
see Chapter 7, "Parts listing, BladeCenter Type 8677 and 1881," on page 77for the
correct FRU number.
The green status dot for a component is not automatically a link to environmental
information (temperature and voltage) for the component. Only the management
module and blade servers have environmental information, and only the green dot for
those components contains a link to environmental information.
If a blade server is under heavy load, it can take several minutes before it
enumerates the USB devices connected to it. If control of the KVM and media tray is
switched away from the blade server before this enumeration is complete, a USB
device installation error might be displayed. Do not switch KVM control between
blade servers until the mouse and keyboard are both working on the blade server
that has control of the KVM and media tray.
Before switching ownership of the media tray to another blade server, safely stop the
media tray devices on the blade server that currently owns the media tray, similar to
the following:
1. Double-click the Unplug or Eject Hardware icon in the Windows taskbar at the
bottom right of the screen.
2. Select USB Floppy, and click Stop.
3. Select USB Mass Storage Device, and click Stop.
4. Click Close.
You can now safely switch ownership of the media tray to another blade server.
Attempting to access the mounted optical drive or diskette drive (media tray) after it
has been switched to another blade server results in I/O errors, even if the media tray
has been switched back.
Note: Because the BladeCenter 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.
v If a blade server tries to access the optical drive after it has been switched to
another blade server, a "Media not found" error occurs.
v If a blade server is running a DOS environment, such as when updating firmware
on the blade server, the firmware can be interrupted or corrupted when the media
tray is switched away; you might need to call for service on the blade server.
v If a file handle was left open by switching the media tray away, the system
administrator will not be able to do a clean unmount (umount command) unless the
unmount is forced by umount command parameters ("lazy umount").
v If the system administrator is sharing out the optical drive for multiple users, that
network share is broken.
Before switching ownership of the media tray to another blade server, ensure that the
optical drive and diskette drive are not mounted for the current blade server owner
(check for open file handles and sharing out). If a firmware update is taking place on
the blade server, do not switch the media tray to another blade server.
Chapter 6. Symptom-to-FRU index
59