Alt Disk Patching procedure AIX 

  

Prerequisites 

• Verify the root disk from SAN or local disk  (lsdev -Cc disk)
• Verify the disk is under the MPIO or powerpath control (lspv)
• Get the new Alt_disk with same size or higher than current boot disk/Lun size

                   bootinfo -b (Verify the current boot disk) 

                   lspv | grep -i rootvg 

        inq

•          Rootvg is not mirrored (Ex: boot disk is hdisk0 and other root disk is hdisk1) 

 unmirrorvg -c 1 rootvg hdisk1

   chpv -c hdisk1

 lspv -l hdisk1 (migrate Lv or move dumplv if needed)

 reducevg rootvg hdisk1

 bosboot -ad /dev/hdisk0

• Verify and commit previous updates

          lppchk -v

    installp -c all 

• Locate the Package source NIM / NFS/NAS or DVD - Apply bos.rte install on Apply mode

    installp -aXYd /mnt/<lpp_source>/ppc bos.alt_disk_install

•  SAN disk Installation procedure 

1. Take the disk out of powerpath control (pprootdev fix)
2. Note Child device name for SAN alt_disk                               powermt display dev=hdiskpower# 
3. rmdev -l hdiskpower# (Make the power device in define state)
4. alt_disk_copy -d hdisk# -l /mnt/<lpp_source> -b update_all      (Update the package on clone disk)
    
5. verify the bootlist changed to the new alt_disk 
6. get downtime and reboot the server 
7. verify the pre and post log