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The command switch displays unique id of disks (UDID) and does the same job as the code I was using before, but in a more handy way.

Now simple commands

# lspv -u
hdisk0    00f992d442626fae  old_rootvg          33213600507680XXXXXXXXX0000000000080E04214503IBMfcp                  5fe2b852-5734-bdec-35e4-2d282e6b4380
hdisk1    00f992d443278dcf  nimavg      active  33213600507680XXXXXXXXX0000000000080F04214503IBMfcp                  f464df3f-48ac-baa1-be03-74832653707e

Friendly name based on LUN names on storage IBM

# lsmpio -q
Device           Vendor Id  Product Id       Size       Volume Name             
---------------------------------------------------------------------------------
hdisk0           IBM        2145               40.00GiB AIXNA001_ROOTVG
hdisk1           IBM        2145                1.12TiB AIXNA001_NIMAVG01

lsdev -Cc disk -F name | while read hdisk
do
  echo ${hdisk},$(odmget -q "name=${hdisk} and attribute=unique_id" CuAt|grep value|cut -d '"' -f2)
done

UDID is build up using a certain logic. I haven't seen the code, but some of the interesting parts are easy to spot:

  unique_id attribute of an SAS attached hdisk is 2A1135000C500337924AB0BST9146852SS03IBMsas. This ID contains WWNN of the SAS controller (00C500337924AB), disk vendor (IBM), connection type (sas), and also disk model ST9146852SS, which is 146,8GB SAS.
  unique ID of a logical volume is VGID.sequence_number. For example ID of a third logical volume in a specific VG is 00cc572600004c00000001325d0ab9bd.3.

A few examples of lspv -u outputs with comments on UDID:

    Locally attached SAS disk

    hdisk0  00cc57264df9dc6b  rootvg  active  2A1135000C500238633030BST9146852SS03IBMsas

    virtual disk connected via virtual scsi, backed by SAS disk.

    hdisk28  00cc572646f271f9  none  3F2A2A1135000C500337924AB0BST9146852SS03IBMsas05VDASD03AIXvscsi

    virtual disk connected via virtual scsi, backed by logical volume. Logical volume ID can by identified by a period.

    hdisk0  00cc57265d4534bd  rootvg  active  372200cc572600004c00000001325d0ab9bd.205VDASD03AIXvscsi

    SAN disk attached via physical or virtual FC. The disk comes from a DS8100 disk array identified as 75BBXM1. Volume ID of the disk in DS8100 is 180D.

    hdisk39  00cc5726aaa9e19e  testvg  active  200B75BBXM1180D07210790003IBMfcp

    virtual disk connected via virtual scsi, backed by SAN disk. The disk comes from a DS8300 disk array identified as 75YY981. Volume ID of the disk in DS8300 is 0501.

    hdisk2  00cc57260b6d4ca6  rootvg  active  3520200B75YY981050107210790003IBMfcp05VDASD03AIXvscsi

Examples of UUID:

DS8000: through VIOS

V3000/V7000/SVC: native with SDDPCM

SAS disk: native SAS

pcmpathq ()
{
# version 1.1 02/2016

verbose=$1     # -v for friendly format, default is comma separated

if [ "$verbose" == "-v" ]
then
  printf "#########################################################################################################################\n"
  printf "%-15s %-25s %-15s %-15s %-30s %-10s\n" '#'HDISK PVID VG MANUFACTURER SORAGE-DISK_SERIAL TYPE
  printf "#########################################################################################################################\n"
fi

for line in $(lspv -u | sed 's/\ /;/g')
do
  typeset -Z4 diskid
  hdisk=$(echo $line | sed 's/;/\ /g' | awk '{print $1}')
  pvid=$(echo $line | sed 's/;/\ /g' | awk '{print $2}')
  vg=$(echo $line | sed 's/;/\ /g' | awk '{print $3}')
  diskfull=$(echo $line | cut -c80- | sed 's/;/\ /g' | rev | awk '{print $2,$3,$4,$5}' | rev | sed 's/\ //g')
  endline=$(echo $diskfull | sed 's/[0-9]/\ /g' | rev | awk '{print $1}' | rev)
  if [ $(echo $endline | grep vscsi > /dev/null; echo $?) -eq 0 ]
  then
    type=vscsi
    if [ $(echo $diskfull | grep "NVDISK" > /dev/null; echo $?) -eq 0 ]
    then
      diskfull=$(echo $diskfull | cut -c6-51)
    else
      diskfull=$(echo $diskfull | cut -c9- | sed 's/fcp/\ /' | awk '{print $1}')
    fi
  else
    if [ $(echo $endline) == "IBMsas" ]
    then
      type=sas
    else
      type=fcp
      diskfull=$(echo $diskfull | cut -c5- | sed 's/fcp/\ /' | awk '{print $1}')
    fi
  fi
  manufacturer=$(echo $diskfull | rev | sed 's/[0-9]/\ /g' | awk '{print $1}' | rev)
  if [ "$manufacturer" == "HITACHI" ]
  then
    serial=$(echo $diskfull | cut -c1-8)
    hexadiskid=$(echo $diskfull | cut -c9-12)
    diskid=$(printf "%d\n" 0x$hexadiskid)
  else
    if [ "$manufacturer" == "IBM" ] 
    then
      if [ $(echo $diskfull | sed 's/IBM/\ /' | awk '{print $1}' | rev | cut -c3-10 | rev | grep -q '2145';echo $?) -eq 0 ]
      then 
        # for SVC, V3k, V7k
        serial=$(echo $diskfull | cut -c2-33)
        diskid=""
        if [ $(echo $diskfull | sed 's/IBM/\ /' | awk '{print $1}' | rev | cut -c3-10 | rev | grep -q '2107';echo $?) -eq 0 ]
        then 
          # For DS8k serial: cut -c1-7 diskid: -c8-11
          serial=$(echo $diskfull | cut -c1-4)
          diskid=$(echo $diskfull | cut -c9-13)
        else
          typeset -Z9 diskid 
          serial="IBM"
          diskid="Unknown"
        fi
      fi
    else
      typeset -Z2 diskid
      if [ "$manufacturer" == "DataCore" ]
      then
        serial=$(lscfg -vpl $hdisk | grep "Device Specific" | grep "(Z0)" | sed 's/\./\ /g' | rev | awk '{print $1}' | rev)
        diskid="NA"
      else
        if [ "$manufacturer" == "NVDISK" ]
        then
          serial=$(echo $diskfull | cut -c1-32 | tr 'A-Z' 'a-z')
          diskid=""
        else
          serial="NA"
          diskid="NA"
        fi
      fi
    fi
  fi
  if [ "$verbose" == "-v" ]
  then
    printf "%-15s %-25s %-15s %-15s %-30s %-10s\n" $hdisk $pvid $vg $manufacturer "$serial $diskid" $type
  else
    echo $hdisk";"$pvid";"$vg";"$manufacturer";"${serial}${diskid}";"$type | sed 's/\ //g'
  fi
done
}