AIX rootvg boot issues from cDOT storage
I am trying to resolve AIX system boot issues from the cDOT system. Here's the issue:
I can boot the AIX from the old IBM N-Series storage using N-Series Host Utilities Kit (HUK). Our goal is to migrate this server from the N-Series to the new cDOT system so the server is booting from the new cDOT. The AIX server doesn't see the boot device after we have uninstalled the N-Series HUK and the new HUK Ver.6 for AIX is installed. We went through various test scenarios as below:
Two IBM AIX Test Enviroments.
- Test Environment #1:
- Purpose:
- Uninstall IBM N-Series HUK in favor of NetApp 6.0 HUK
- Host/LPAR:
- AIX 6.1 TL8 SP3
- IBM N-Series HUK Installed.
- Using NPIV not vSCSI via VIO Server
- Storage:
- SAN Boot LUN Data has already been migrated from N-Series to the following:
- SAN Boot LUN on NetApp ClusteredONTAP 8.2 (8040/8020 HA cluster)
- Attempted Tests:
- Test #1: Uninstall of IBM N-Series HUK & Install of NetApp HUK:
- 1 - Single Path created for Boot LUN from LPAR to CDOT array using assigned portset to igroup. (Only one HBA adaptor enabled on LPAR)
- 2 - Boot off single path LUN
- 3 - Chdev –p hdisk# -a algorithm=fail_over –a reserve_policy=single-path
- 4 - Bootlist –m normal hdisk# (ensure boot LUN is in bootlist)
- 5 - Remove all other devices except boot LUN.
- 6 - Remove all N-Series MPIO drivers
Installation Summary
--------------------
Name Level Part Event Result
-------------------------------------------------------------------------------
Ontap.MPIO_Host_Utilities_K 6.0.0.0 USR DEINSTALL SUCCESS
Ontap.MPIO_Host_Utilities_K 6.0.0.0 USR DEINSTALL SUCCESS
Ontap.MPIO_Host_Utilities_K 6.0.0.0 USR DEINSTALL SUCCESS
Ontap.MPIO_Host_Utilities_K 6.0.0.0 USR DEINSTALL SUCCESS
Ontap.SAN_toolkit.sanlun 6.0.0.0 USR DEINSTALL SUCCESS
Ontap.SAN_toolkit.scripts 6.0.0.0 USR DEINSTALL SUCCESS
- 7 - Reboot (with single path)
- 8 - Remove all other devices except boot LUN
- 9 - Install all packages NetApp HUK (successful)
Installation Summary
--------------------
Name Level Part Event Result
-----------------------------------------------------------------------------
NetApp.MPIO_Host_Utilities_ 6.0.0.0 USR APPLY SUCCESS
NetApp.MPIO_Host_Utilities_ 6.0.0.0 USR APPLY SUCCESS
NetApp.MPIO_Host_Utilities_ 6.0.0.0 USR APPLY SUCCESS
NetApp.MPIO_Host_Utilities_ 6.0.0.0 USR APPLY SUCCESS
- 10 - Reboot (with single path)
- 11 – Result: Error 554 on boot.
-
- Test #2: Uninstalled of IBM N-Series HUK & Re-install of N-Series HUK.
- Same steps as in Test #1.
- Exception: Replace Step 9 with the following:
- 9 – Re-install IBM N-Series HUK
- MPIO_Host_Utilities_Kit.config
- 0.0.0 COMMITTED Data ONTAP MPIO PCM Host
- MPIO_Host_Utilities_Kit.fcp
- 0.0.0 COMMITTED Data ONTAP MPIO PCM Host
- MPIO_Host_Utilities_Kit.iscsi
- 0.0.0 COMMITTED Data ONTAP MPIO PCM Host
- MPIO_Host_Utilities_Kit.pcmodm
- 0.0.0 COMMITTED Data ONTAP MPIO PCM Host
- 11 – Result: Reboot Successful.
- Test Environment #2:
- Purpose:
- Uninstall IBM N-Series HUK in favor of NetApp 6.0 HUK
- (Using AIX image based on NetApp N-Series)
- Host/LPAR:
- AIX 6.1 TL8 SP3
- IBM N-Series HUK Installed.
- Using NPIV not vSCSI via VIO Server
- Storage:
- SAN Boot LUN Data has already been migrated from N-Series to the following:
- SAN Boot LUN on NetApp 7-Mode 8.1.4P1 (3140 HA pair)
- Attempted Tests:
- Test #1: Install Native AIX MPIO Drivers on New AIX OS
- Packages Installed:
- Native AIX MPIO
- AIX OS:
- New AIX OS Install from scratch
- Results:
- Reboot Successful.
- Test #2a): Install NetApp 6.0 HUK on New AIX OS
- Packages Installed:
- NetApp 6.0 HUK (All packages)
- NetApp 6.0 SAN Tool Kit
- AIX OS:
- New AIX OS Install from scratch
- Results:
- Reboot Failed.
- Test #2b): Install NetApp 5.0 HUK on New AIX OS
- Packages Installed:
- NetApp 5.0 HUK (All packages)
- NetApp 5.0 SAN Tool Kit
- AIX OS:
- New AIX OS Install from scratch
- Results:
- Reboot Failed.
- Test #3: Use a different AIX OS
- Packages Installed:
- NetApp 6.0 HUK (All packages)
- NetApp 6.0 SAN Tool Kit
- AIX OS:
- Different AIX image
- Test #4: Install *only* 3 packages from NetApp 6.0 HUK on New AIX OS
- Packages Installed:
- NetApp 6.0 HUK
- Packages Installed:
- 6.0.0.0 NetApp MPIO PCM Host Utilities Kit PCM Friend ODM Stanzas
- 6.0.0.0 NetApp MPIO PCM Host Utilities Kit Path Config Tool
- 6.0.0.0 NetApp MPIO PCM Host Utilities Kit iSCSI Disk ODM Stanzas
- Package *NOT* Installed:
- 6.0.0.0 NetApp MPIO PCM Host Utilities Kit FCP Disk ODM Stanzas
- NetApp 6.0 SAN Tool Kit on new AIX OS Install from scratch.
- AIX OS:
- New AIX OS Install from scratch
- Results:
- Reboot Successful
I am wondering if anybody has come through similar situation and resolved it to boot from cDOT storage using AIX HUK 6.0