IBM System x3850 X5 Implementation Manual page 316

If you do not have internal drives, disable the onboard SAS RAID Controller by selecting
System Settings  Devices and IO ports  Enable/Disable Onboard Devices and
disabling the SAS Controller or Planar SAS.
Set the HBA as the first device in the Option ROM Execution Order by selecting System
Settings  Devices and IO Ports  Set Option ROM Execution Order.
For legacy OSs only (all OSs except Windows 2008 and SLES 11 SP1), set Legacy Only
as the first boot device.
Remove all devices, which might not host an OS, from the boot order. The optimal
minimum configuration is CD/DVD and Hard Disk 0. For legacy OSs only, set Legacy
Only as the first boot device.
Enable the BIOS from your HBA.
Verify that your HBA can see a logical unit number (LUN) from your storage.
Make sure that the LUN is accessible through only one path, either Zoning or LUN
masking.
After installation, do not forget to install the multipath driver
path, if you have more than one path to the LUN.
IBM Redbooks references for SAN-related information
A number of IBM Redbooks publications are available for reference. The following IBM
Redbooks publications describe IBM System Storage products and their various
implementations, including with IBM System x product lines:
IBM System Storage Solutions Handbook, SG24-5250
This book provides overviews and pointers for information about the current IBM System
Storage products:
http://www.redbooks.ibm.com/abstracts/sg245250.html
Implementing an IBM/Brocade SAN with 8 Gbps Directors and Switches, SG24-6116
This book consolidates critical information while also covering procedures and tasks that
you are likely to encounter on a daily basis when implementing an IBM/Brocade SAN:
http://www.redbooks.ibm.com/abstracts/sg246116.html
IBM Midrange System Storage Implementation and Best Practices Guide, SG24-6363
This book represents a compilation of best practices for deploying and configuring IBM
Midrange System Storage servers, which include the DS4000® and DS5000 family of
products:
http://www.redbooks.ibm.com/abstracts/sg246363.html
IBM System Storage DS3000: Introduction and Implementation Guide, SG24-7065
This book introduces the IBM System Storage DS3000, providing an overview of its
design and specifications, and describing in detail how to set up, configure, and administer
it:
http://www.redbooks.ibm.com/abstracts/sg247065.html
Implementing an IBM/Cisco SAN, SG24-7545
This book consolidates critical information while discussing procedures and tasks that are
likely to be encountered on a daily basis when implementing an IBM/Cisco SAN:
http://www.redbooks.ibm.com/abstracts/sg247545.html
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IBM eX5 Implementation Guide
before
you set more than one