IBM HS40 - BladeCenter - 8839 Maintenance And Troubleshooting Manual page 98

Note: See Chapter 7, "Parts listing, Type 8839," on page 105 to determine which components should be replaced by
a field service technician.
CD-ROM drive problems
Symptom
CD-ROM drive is not
recognized.
CD is not working properly.
CD-ROM drive tray is not
working. (The server must be
turned on.)
CD-ROM drive is seen as
/dev/sr0 by SuSE. (If the SuSE
Linux operating system is
installed remotely onto a blade
server that is not the current
owner of the media tray
(CD-ROM drive, diskette drive,
and USB port), SuSE sees the
CD-ROM drive as /dev/sr0
instead of /dev/cdrom.)
CD-ROM drive is not
recognized after being
switched back to blade server
running 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, diskette drive, and USB
port (media tray).)
88
BladeCenter HS40 Type 8839: Hardware Maintenance Manual and Troubleshooting Guide
FRU/action
1. Make sure that:
v All cables and jumpers are installed correctly.
v The correct device driver is installed for the CD-ROM drive.
2. Run CD-ROM drive diagnostics.
3. CD-ROM drive.
1. Clean the CD.
2. Run CD-ROM drive diagnostics.
3. CD-ROM drive.
1. Insert the end of a straightened paper clip into the manual tray-release
opening.
2. Run CD-ROM drive diagnostics.
3. CD-ROM drive.
Establish a link between /dev/sr0 and /dev/cdrom as follows:
1. Enter the following command:
rm /dev/cdrom; ln -s /dev/sr0 /dev/cdrom
2. Insert the following line in the /etc/fstab file:
/dev/cdrom /media/cdrom auto ro,noauto,user,exec 0 0
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. 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 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.