IBM BladeCenter S Problem Determination And Service Manual page 85

IBM continually updates the support Web site with tips and techniques that you
can use to resolve any problems that you may be having with the BladeCenter S
system. Go to the BladeCenter support search Web site at http://www.ibm.com/
systems/support/supportsite.wss/search?brandind=5000020 to see if any service
bulletins have been generated. In the Search field, enter the following terms:
storage, 8886, and retain.
Hard disk drives not available to blade servers
Use this information to resolve problems when the blade server is not able to see
the hard disk drives in the storage module.
Problem
The storage module is powered on, but the blade servers cannot see the drives.
Investigation
Perform these steps to resolve the problem:
1. If the problem affects the hard disk drives in storage module 1, make sure that
there is at least one power supply in power module bay 1 or 2. If the problem
affects the hard disk drives in storage module 2, make sure that there is at least
one power supply in power module bay 3 or 4.
2. Make sure that there is at least one SAS connectivity module installed and
functioning. If you are using one SAS connectivity module, it should be
installed in I/O bay 3. If you are using two SAS connectivity modules, they
should be installed in I/O bays 3 and 4.
3. View the amber fault LED on the front of the storage module. If it is lit:
a. Make sure the advanced management module is present and functioning.
b. Log in to the advanced management module and view the event log for
power or cooling problems.
c. Make sure that there is enough power allocated to allow the storage module
to power on. You can view the power budget through the advanced
management module Web interface by clicking Power Management.
d. Reseat the storage module and allow the advanced management module to
power it on.
e. Replace the storage module.
4. Verify that each of the blade servers accessing the hard disk drives in the
storage modules has a SAS expansion card installed. You may need to update
the firmware for the SAS expansion card.
5. Verify that the blade server is zoned to see the hard disk drives in the storage
module. You can see the zone configuration implemented for the BladeCenter S
system from the advanced management module Web interface by clicking
Storage Tasks.
6. Power on the blade server and when prompted, press Ctrl-c to start the SAS
LSI Configuration Utility.
Note: Some blade servers, such as the LS20 have an onboard SCSI controller. If
you are using one of these blade servers, you will notice that the LSI
Configuration prompt will appear twice. Make sure that you choose the SAS
LSI Configuration Utility.
a. Select the SAS expansion card.
b. Select SAS Topology.
Chapter 3. Troubleshooting
71