Cd Or Dvd Drive Problems - IBM BladeCenter HS20 Problem Determination And Service Manual

CD or DVD drive problems

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 3, "Parts listing, Type 7981 and 1884," on page 53 to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Symptom
The CD or DVD drive is not
recognized.
A CD or DVD is not working
correctly.
The CD or DVD drive tray is not
working.
The CD or DVD drive is
detected as /dev/sr0 by SUSE
Linux. (If the SUSE Linux
operating system is installed
remotely onto a blade server
that is not the current owner of
the media tray [CD or DVD
drive, diskette drive, and USB
port], SUSE Linux detects the
CD or DVD drive as /dev/sr0
instead of /dev/cdrom.)
The CD or DVD drive is not
recognized after being switched
back to the blade server running
®
Windows 2000 Advanced
Server with SP3 applied. (When
the CD or DVD drive 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 or DVD drive. This
happens when you have not
safely stopped the drives before
switching ownership of the
media tray [CD or DVD drive,
diskette drive, and USB port].)
26
BladeCenter HS20 Type 7981 and 1884: Problem Determination and Service Guide
Action
1. Make sure that:
v All cables and jumpers are installed correctly.
v The correct device driver is installed for the CD or DVD drive.
2. Reseat the CD or DVD drive.
3. Replace the CD or DVD drive.
1. Clean the CD or DVD.
2. Reseat the CD or DVD drive.
3. Replace the CD or DVD drive.
Note: The blade server must have ownership of the CD or DVD drive.
1. Insert the end of a straightened paper clip into the manual tray-release
opening.
2. Reseat the CD or DVD drive.
3. Replace the CD or DVD 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 USB to communicate with the media
tray devices, switching ownership of the media tray to another blade server is the
same as disconnecting a USB device. Before you switch ownership of the CD or
DVD 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/Eject Hardware icon in the Windows taskbar at the
bottom right of the desktop.
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.