===== Power Linux hardware RAID configuration =====

==== Work with raid after OS installation ====

The linux package **iprutils** allows to configure a RAID adapter.

<cli prompt='#'>
[root@rh-ppcle ~]# iprconfig
</cli>
<code>
                      IBM Power RAID Configuration Utility

  Select one of the following:
    1. Display hardware status
    2. Work with disk arrays
    3. Work with disk unit recovery
    4. Work with SCSI bus configuration
    5. Work with driver configuration
    6. Work with disk configuration
    7. Work with adapter configuration
    8. Download microcode
    9. Analyze log
</code>    
 
Example of commands to manage RAID:

http://www.unix.com/man-page/centos/8/iprconfig/

1. Concurrent maintenance commands line changes from PCI location to physical location(3/12/2012).
   #iprconfig -c identify-slot "U5886.001.P915059-P1-D1 1"
   #iprconfig -c remove-slot "U5886.001.P915059-P1-D1 1"
   #iprconfig -c add-slot "U5886.001.P915059-P1-D1 1"
   
2. Work with disk enclosures
   #iprconfig -c query-disk-enclosure-status
   #iprconfig -c suspend-disk-enclosure sg8
   #iprconfig -c resume-disk-enclosure sg8


^ ^ Task ^ Command ^
| |General help|man iprconfig|
| |Viewing the disk array status|iprconifg -c show-arrays| 
| |Format device for advanced function|iprconfig -c format-for-raid [disk].....[disk]|
| |Format device for JBOD function|iprconfig -c format-for-jbod [disk]....[disk]|
| |Creating a SAS disk array|iprconfig -c raid-create -r [raid-level] -s [strip_size] [devices]|
| |Deleting a SAS disk array|iprconfig -c raid-delete [RAID device]|
| |Adding disks to an existing disk array|iprconfig -c raid-include [array] [disk]...[disk]|
| |Creating hot spare disks|iprconfig -c hot-spare-create [disk]|
| |Deleting hot spare disks|iprconfig -c hot-spare-delete [disk]|
| |Displaying rechargeable battery information|iprconfig -c show-battery-info [IOA]|

   
==== Install OS on a RAID array ====


It's recommended to configure the array/raid before install the Linux OS. 

=== First download the diagnostic CDROM to setup the raid: ===

https://www-304.ibm.com/webapp/set2/sas/f/diags2/download/
  
=== Then boot on diagnostic CDROM, go to SMS menu to boot on CD/DVD ===

The following Diag Menu will appear
<code>
FUNCTION SELECTION                                                                                              

Move cursor to selection, then press Enter.

  Diagnostic Routines
    This selection will test the machine hardware. Wrap plugs and
    other advanced functions will not be used.
  Advanced Diagnostics Routines
    This selection will test the machine hardware. Wrap plugs and
    other advanced functions will be used.
  Task Selection (Diagnostics, Advanced Diagnostics, Service Aids, etc.)
    This selection will list the tasks supported by these procedures.
    Once a task is selected, a resource menu may be presented showing
    all resources supported by the task.
  Resource Selection
    This selection will list the resources in the system that are supported
    by these procedures. Once a resource is selected, a task menu will
    be presented showing all tasks that can be run on the resource(s).

F1=Help                      F10=Exit                      F3=Previous Menu
</code> 

Choose **Task Selection**
<code>
TASKS SELECTION LIST                                                                                            

From the list below, select a task by moving the cursor to
the task and pressing 'Enter'.
To list the resources for the task highlighted, press 'List'.

  Run Diagnostics
  Run Error Log Analysis
  Run Exercisers
  Display or Change Diagnostic Run Time Options
  Add Resource to Resource List
  Automatic Error Log Analysis and Notification
  Backup and Restore Media
  Change Hardware Vital Product Data
  Configure Platform Processor Diagnostics
  Delete Resource from Resource List
  Disk Maintenance
  Display Configuration and Resource List
  Display Firmware Device Node Information
  Display Hardware Error Report
  Display Hardware Vital Product Data
  Display Multipath I/O (MPIO) Device Configuration
  Display Previous Diagnostic Results 
  Display Resource Attributes 
  Display Software Product Data
  Display or Change Bootlist
  Gather System Information
  Hot Plug Task 
  Log Repair Action
  Microcode Tasks
  RAID Array Manager
  Update Disk Based Diagnostics
[BOTTOM]

F1=Help                      F4=List                       F10=Exit                     Enter
F3=Previous Menu
</code>

Choose **RAID Array Manager**
<code>
RAID Array Manager                                                                                              

Move cursor to desired item and press Enter.
  IBM SAS Disk Array Manager
  PCI SCSI Disk Array Manager
  PCI-X SCSI Disk Array Manager
</code>

Depending on the adapter / disk type, choose the right adapter type, example:**IBM SAS Disk Array Manager**
<code>
       IBM SAS Disk Array Manager

Move cursor to desired item and press Enter.

  List SAS Disk Array Configuration
  Create an Array Candidate pdisk and Format to RAID block size
  Create a SAS Disk Array
  Delete a SAS Disk Array
  Add Disks to an Existing SAS Disk Array
  Migrate an Existing SAS Disk Array to a New RAID Level
  Configure a Defined SAS Disk Array
  Change/Show Characteristics of a SAS Disk Array
  Manage HA Access Characteristics of a SAS Disk Array
  Reconstruct a SAS Disk Array
  Change/Show SAS pdisk Status
  Diagnostics and Recovery Options
</code>

Now you can create a RAID ARRAY with disks that are candidates, you can select spares...define raid array, and only that are supported (depending on adapter) will be proposed.

Once format of raid array is finish
 
=== Install the Linux PPC or PPCle OS ===

Boot on CD using SMS menu and start Linux installation.

https://www.ibm.com/developerworks/aix/tutorials/au-aix-raid/index.html