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30nov/11

How to Capture SAN Boot Debug for Virtual I/O Server and AIX on P6 Systems

Problem(Abstract)
How to capture boot debug of a SAN boot PowerVM Virtual I/O Server or AIX/NPIV client partition that is failing to boot.

Symptom
NPIV/AIX Client or VIOS fails to boot from SAN.

Environment
REQUIREMENTS

1. POWER6 System

2. A program where console terminal logging can be enabled will be needed. The following procedure uses PuTTY (a Windows ssh client program) as the means to open a console session to capture the boot debug data to a file. It's available for download at http://www.putty.org

Diagnosing the problem
Things to check PRIOR to gathering the debug

For a NEW NPIV/AIX Client Install

1. Ensure NPIV mapping is correct
2. Ensure SAN swtich is zoned correctly to the NPIV client's WWPN
3. Ensure resources (LUN) is assigned from the storage directly to the client's WWPN
4. Ensure Installation media meet minimum level required by the storage

For previously running LPAR

1. Check if boot device can be set in SMS
2. Check if rootvg is accessible in Service Mode.

Resolving the problem

1. To capture a boot debug to a file, open an ssh session via PuTTY to the HMC as follows

Under Category
Session
-> click on Logging
-> select "All session output" on the right
-> specify the filename in the "Log file name" box as shown in Figure 1

Terminal
-> click on Keyboard
-> select Control-H for the Backspace key

Click on Session
-> Type in the full domain to the HMC in the Host Name and Saved Sessions box
-> select SSH protocol (HMC must be configured to accept ssh connections)
-> Click on Open (See Figure 2). You will get a PuTTY Security Alert Window
-> Click No to connect just once

-> Login as hscroot and type 'vtmenu' to open a console session to the partition in question
-> Select the Managed System name
-> Select the partition in question =>You may or may not see activity at this point depending on the status of the partition.

2. Boot the partition to Open Firmware (0 >) prompt, run ioinfo utility, and select the FCINFO option as follows:

0 > ioinfo

!!! IOINFO: FOR IBM INTERNAL USE ONLY !!!
This tool gives you information about SCSI,IDE,SATA,SAS,and USB devices attached to the
system

Select a tool from the following

      1. SCSIINFO
      2. IDEINFO
      3. SATAINFO
      4. SASINFO
      5. USBINFO
      6. FCINFO <=====
      7. VSCSIINFO


q - quit/exit

==> 6

3. Select the desired path. In this example, we are selected the 2nd virtual Fibre Channel path:

FCINFO Main Menu
Select a FC Node from the following list:

      # Location Code Pathname

---------------------------------------------------------------

      1. U9117.MMA.65EBF8C-V32-C5-T1 /vdevice/vfc-client@30000005
      2. U9117.MMA.65EBF8C-V32-C6-T1 /vdevice/vfc-client@30000006


q - Quit/Exit

==> 2

4. Select a FC Device

FC Node Menu
FC Node String: /vdevice/vfc-client@30000006
FC Node WorldWidePortName: c05076001ab6003a
-----------------------------------------------------------------
1. List Attached FC Devices
2. Select a FC Device <=====
3. Enable/Disable FC Adapter Debug flags

q - Quit/Exit

==> 2

5. Select the appropriate LUN. In this example option 1 happens to be the bootable device:

1. 50060e801530f310,0 - 10240 MB Disk drive (bootable)
2. 50060e801530f310,1000000000000 - 35840 MB Disk drive

Select a FC Device : 1

FC Device Menu
FC Target Address ==> 50060e801530f310 FC Lun Address ==> 0
FC Device String: /vdevice/vfc-client@30000006/disk@50060e801530f310,0:0
FC Device: 10240 MB Disk drive (bootable)
----------------------------------------------------------------------

6. Select "Display Inquiry Data"

      1. Display Inquiry Data <=====
      2. Spin up Drive
      3. Spin down Drive
      4. Continuous random Reads ( hit any key to stop )
      5. Enable/Disable FC Device Debug flags
      98. Boot from this Device
      q - Quit/Exit

==> 1

INQUIRY DATA FOR : TARGET ==> 50060e801530f310
LUN ==> 0 - 10240 MB Disk drive (bootable)
000002f4cd00: 00 00 03 32 cf 00 00 02 48 49 54 41 43 48 49 20 :...2....HITACHI :
000002f4cd10: 4f 50 45 4e 2d 56 20 20 20 20 20 20 20 20 20 20 :OPEN-V :
000002f4cd20: 36 30 30 34 35 30 20 31 33 30 46 33 33 30 33 33 :600450 130F33033:
000002f4cd30: 20 32 41 20 01 01 01 01 00 00 00 00 00 00 00 00 : 2A ............:
000002f4cd40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 :................:
000002f4cd50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 :................:
000002f4cd60: 05 01 05 70 30 30 ff 00 c0 50 76 00 1a b6 00 3a :...p00...Pv....::
000002f4cd70: c0 50 76 00 1a b6 00 3a 00 00 00 0f 00 00 00 00 :.Pv....:........:
000002f4cd80: 00 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 :................:
000002f4cd90: 01 01 01 01 00 00 00 00 01 01 01 01 01 01 01 01 :................:
000002f4cda0: 01 01 01 01 01 01 01 01 55 55 55 55 55 55 55 55 :........UUUUUUUU:
000002f4cdb0: 55 55 55 55 00 00 00 00 ff ff ff ff 00 00 00 00 :UUUU............:
000002f4cdc0: 00 00 00 03 00 00 00 01 00 00 00 01 00 01 99 40 :...............@:
000002f4cdd0: 00 00 71 a3 00 00 00 00 00 00 00 00 00 00 00 00 :..q.............:
000002f4cde0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 :................:
000002f4cdf0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 :...............:
Hit a key to continue...

FC Device Menu
FC Target Address ==> 50060e801530f310 FC Lun Address ==> 0
FC Device String: /vdevice/vfc-client@30000006/disk@50060e801530f310,0:0
FC Device: 10240 MB Disk drive (bootable)
----------------------------------------------------------------------

7. Select to "Boot from this Device"

      1. Display Inquiry Data
      2. Spin up Drive
      3. Spin down Drive
      4. Continuous random Reads ( hit any key to stop )
      5. Enable/Disable FC Device Debug flags
      98. Boot from this Device


q - Quit/Exit

==> 98

----------------------------------------------------------------------
                                     Welcome to AIX.
                       boot image timestamp: 06:26 10/01
             The current time and date: 09:46:20 10/01/2009
   processor count: 1; memory size: 8192MB; kernel size: 23463042
boot device: /vdevice/vfc-client@30000006/disk@50060e801530f310,0
-----------------------------------------------------------------------
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