====== LPAR Removal ======

This page details the removal of an LPAR and the deletion of the associated filesystems, LUNS and VIO mappings.

Information required.

  LPAR Name            webdb
  Frame                Server-9119-595-2-SN83627FE
  LPAR partition id    43 (2Bh)
  Vio servers          b0022-vios1sp, b0022-vios2sp
  Scsi adapter number  Adapter 40
  
  Volume groups        rootvg, rootvgm, webdb_flashvg


===== LPAR work =====

Find out LPAR partition id eg. 43 == web_db (43d = 2Bh)

List Volume Groups, usually rootvg, rootvgm and application specific VG's. It would be usual for these to be created from one LUN each.

===== VIO Remove VTD device =====

Find out vhost number:-

  $ lsdev -virtual |grep vhost |awk {'print $1'} |while read v
  do
  lsmap -vadapter $v |grep $v
  done
  ...edited...
  vhost37         U9119.595.83627FE-V4-C40                     0x0000002b


Find out all the mappings:-

  $ lsmap -all | grep webdb
  VTD                   webdb_flashrec
  VTD                   webdb_rootvg
  VTD                   webdb_rootvgm
  $


Find out the disk backing devices:-

  $ lsmap -all | grep -p webdb_rootvg
  VTD                   webdb_rootvg
  Status                Available
  LUN                   0x8100000000000000
  Backing device        hdisk136
  Physloc               U5791.001.99B0GMF-P1-C02-T1-W50050768011038B1-LB1000000000000
  
  VTD                   webdb_rootvgm
  Status                Available
  LUN                   0x8200000000000000
  Backing device        hdisk333
  Physloc               U5791.001.99B0GMF-P1-C02-T1-W50050768011038B1-LB2000000000000
  $ 



Then on each VIO server remove the VTD device (LUN name) & the backing device.

  rmvdev -vtd webdb_flashrec


Remove the associated hdisks:-

  $ lsmap -all | grep -p webdb_rootvg
  VTD                   webdb_rootvg
  Status                Available
  LUN                   0x8100000000000000
  Backing device        hdisk136
  Physloc               U5791.001.99B0GMF-P1-C02-T1-W50050768011038B1-LB1000000000000
  
  VTD                   webdb_rootvgm
  Status                Available
  LUN                   0x8200000000000000
  Backing device        hdisk333
  Physloc               U5791.001.99B0GMF-P1-C02-T1-W50050768011038B1-LB2000000000000
  
  $ rmvdev -vtd webdb_rootvg
  webdb_rootvg deleted
  
  $ rmvdev -vtd webdb_rootvgm
  webdb_rootvgm deleted
  
  
  $ rmdev -dev hdisk136
  hdisk136 deleted
  
  $ rmdev -dev hdisk333
  hdisk333 deleted
  $
  

Also remove the vhost device, this is the odd one out, one would expect it to be a rmvdev, but it an rmdev:-

  $ rmdev -dev vhost37
  vhost37 deleted
  $

In the HMC GUI, delete the profile entry for the virtual scsi adapter, and also DLPAR it out.



===== SVC work =====

On the appropriate nim server. the luns presented to VIO for SVC need deleting.

  bash-3.00# ssh admin@SVC2 svcinfo lshostvdiskmap | grep webdb
  0                B0038_VIOS1SP     77             88             webdb_rootvg      10000000C95F9B21 60050768019201D9B00000000000026F
  0                B0038_VIOS1SP     78             182            webdb_rootvgm     10000000C95F9B21 60050768019201D9B000000000000270
  0                B0038_VIOS1SP     80             178            webdb_flashrec    10000000C95F9B21 60050768019201D9B000000000000274
  1                B0038_VIOS2SP     77             88             webdb_rootvg      10000000C9603CE3 60050768019201D9B00000000000026F
  1                B0038_VIOS2SP     78             182            webdb_rootvgm     10000000C9603CE3 60050768019201D9B000000000000270
  1                B0038_VIOS2SP     80             178            webdb_flashrec    10000000C9603CE3 60050768019201D9B000000000000274
  4                B0022_VIOS1SP     176            178            webdb_flashrec    10000000C95AAF4B 60050768019201D9B000000000000274
  4                B0022_VIOS1SP     177            88             webdb_rootvg      10000000C95AAF4B 60050768019201D9B00000000000026F
  4                B0022_VIOS1SP     178            182            webdb_rootvgm     10000000C95AAF4B 60050768019201D9B000000000000270
  5                B0022_VIOS2SP     176            178            webdb_flashrec    10000000C95A8BE1 60050768019201D9B000000000000274
  5                B0022_VIOS2SP     177            88             webdb_rootvg      10000000C95A8BE1 60050768019201D9B00000000000026F
  5                B0022_VIOS2SP     178            182            webdb_rootvgm     10000000C95A8BE1 60050768019201D9B000000000000270
  bash-3.00#


Run script appropriate for the VIO server:-

  bash-3.00# ./rmmaptoviosB22P.ksh webdb_flashrec
  bash-3.00#  

Delete the vdisks.....


===== LPAR work (2) =====

To finish off, delete the LPAR profile. This will free up the used CPU and memory back to the frame.