SW/FS/SVC Volume Mobility

SAN Volume Controller / Storwize / Flash System version 8.4.2 allows you to non-disruptively migrate a LUN between array controller clusters. It’s set up like remote copy, except you can map the remote copy to the same host at the same time. The remote copy becomes non-preferred paths for the same vdisk and vdisk ID. Then you can switch who is primary. Then you can remove the old copy.

Here is someone who did a demo video: https://www.youtube.com/watch?v=NpcOoshkm4w‚Äč


Sometimes, AIX migrations are a pain…

*************************************************************
Mksysb\Migration Enabled
*************************************************************

Running: Init_Target_Disks...
Running: Other_Initialization...
Running: Fill_Target_Stanzas...
Running: Check_Other_Stanzas...
Could not load program ls:
Cannot run a 64-bit program until the 64-bit
environment has been configured. See the system administrator.

This is because the default in 32-bit systems is to NOT load the 64-bit kernel. Just another line to override in the bosinst.data file:

So, the total list so far is:
CONTROL_FLOW stanza must be set as follows:

     MKSYSB_MIGRATION_DEVICE = network
     INSTALL_METHOD = migrate
     PROMPT = no
     EXISTING_SYSTEM_OVERWRITE = yes
     RECOVER_DEVICES = no
     INSTALL_64BIT_KERNEL = yes

target_disk_data should have one entry for each of hdisk0 and hdisk1

target_disk_data:
        PVID =
  PHYSICAL_LOCATION =
        CONNECTION =
        LOCATION =
        SIZE_MB =
        HDISKNAME = hdisk0