HP Booting Linux X86 And X86 64 Systems Manual

 
Booting Linux x86 and x86_64 systems from a Storage 
Area Network with Device Mapper Multipath 
Enabling the High Availability feature for Operating System Partitions 
Fifth Edition 
 
Document Overview ........................................................................\
...................................................  2 
Intended Audience .......................................................................\
..................................................  2 
Assumptions...

Document Overview 
This white paper helps you understand the concepts and configuration of boot from SAN and 
enabling multipath features for the Root partition on SAN in deployments using Device Mapper 
multi-path. It includes recommendations for im plementing and configuring operating system 
installation partitions to enable the Device Mapper multipath feature on your Linux server. 
 
Intended Audience 
This document is intended for users who would be  implementing the high availability features of...

 
Configuring boot from SAN 
Boot from SAN has become a de facto description for the capability of having a server boot its 
operating system from SAN. The HBA ROM provides  this functionality. Once HBAs are configured 
to boot from the disk device on the SAN, th e server boots as if it were a local disk.  
 
More than one HBA can be configured for the redu ndant boot path for the High Availability of the 
Boot device. The Failover feature during boot time is provided by the HBA ROM configuration....

 
Figure 2 
  b.  Select the NIC to which the boot option  is to be set and press Enter twice. 
 
Figure 3 
 
c.   Select  iSCSI Boot  and press Enter. 
 
Figure 4 
 
d.   iSCSI Boot must be displayed as the  boot option for the NIC you selected. 
 
Figure 5  

 
3. Press Escape, and then press F10 to save  your configuration and exit the utility. 
 
Configuring HBA/NIC ROM 
This section details the steps to configure  the Host Bus Adapter to boot from SAN. 
Qlogic HBA ROM configuration
 
Emulex HBA ROM configuration
 
HP Smart Array P700m Controller ORCA configuration
 
HP SC08Ge SAS HBA configuration
 
HP ProLiant Gigabit Ethernet Multif unction server adapter configuration
  

Qlogic HBA ROM configuration 
 
To configure the boot device for high availability on HP ProLiant servers, complete the following 
steps: 
 
1.  While the server is booting, press Ctrl+Q to enter  Fast!UTIL.  
2.  From the  Select Host Adapter  menu, select the HBA you want to boot, and press Enter. 
 
Figure 6  
 
3.  From the  Fast!UTIL Options  menu, select Configuration Settings , and press Enter. 
 
Figure 7  
  

4. From the  Configuration Settings  menu, select Adapter Settings , and press Enter. 
 
Figure 8  
 
5.  From the  Adapter Settings  menu, change Host Adapter BIOS to  Enabled by pressing Enter. 
 
Figure 9  
 
6.  Press ESC to go back to the  Configuration Settings menu Figure 8
. 
7.  Select  Selectable Boot Settings , and then press Enter.  
8.  From the  Selectable Boot Settings  menu, enable the Selectable Boot option by pressing Enter, 
move the cursor to Primary Boot Port Name, LUN, and press...

9. From the  Select Fibre Channel Device  menu, select the controller Port Name of the array and 
press Enter. 
 
Figure 11  
 
10.  From  Select LUN  menu, select the device to  boot from, and press Enter. 
 
Figure 12  
 
Note:  LUN index in the previous figure corresponds to the Lun ID of the boot device 
presented to the host. 
 
11.  From the  Selectable Boot Settings  menu, to configure the secondary boot paths, select Boot 
Port Name, Lun. Repeat Step 8 and Step 9 for  all the other controller...

 
Figure 13  
 
12.  Save the changes by pressing ESC twice, and  then select Save Changes. This saves the 
configuration changes to selected HBA.  
13.  From the  Fast!UTIL Options  menu, choose Select Host Adaptor  option, and press Enter. Select 
the other HBAs ( Figure 6
) and repeat the steps 2 to 12 to configure the HBA for booting the 
server. 
 
Note:  Refer to the “Booting Itanium Linux systems fr om a storage area network application notes” 
for the procedure to configure the HBA ROM on an...

Emulex HBA ROM configuration 
 
To configure the boot device for high availability on HP ProLiant servers, complete the following 
steps: 
1.  While the server is booting, press Alt+ E when the following message appears:  
     Press  To Go To Emulex BIOS Utility .  
2.  The Emulex BIOS utility displays  Emulex Adapters  in the system. At the  Enter a Selection 
prompt, select the HBA index number. 
 
Figure 14  
 
3.  From the HBA  configuration menu  screen, select option 2, Configure This Adapter’s...