[rhel7] Different output for WWN between lsscsi and lsblk

[Nicolas C.]

Hello,

On RHEL7, can anyone explain why WWN are trucated with the "lsblk" 
command compared to "lsscsi"?

[root at xxx ~]# lsblk -o +wwn --raw | awk '$6 == "disk"'
sda 8:0 0 512M 0 disk  0x6000c295b23ff650
sdb 8:16 0 10G 0 disk  0x6000c292620bb0eb
sdc 8:32 0 16G 0 disk  0x6000c295aa065200
sdd 8:48 0 70G 0 disk  0x6000c29d06fccc82
sde 8:64 0 500G 0 disk  0x6000c2909730c5c3
sdf 8:80 0 200G 0 disk  0x6000c29e116828d4
sdg 8:96 0 5G 0 disk  0x6000c297ebf0717d

[root at xxx ~]# lsscsi --wwn
[0:0:0:0]    disk    0x6000c295b23ff650e8af9c9cc76a46b7  /dev/sda
[0:0:1:0]    disk    0x6000c292620bb0ebcb0d2431e1e686cd  /dev/sdb
[0:0:2:0]    disk    0x6000c295aa065200042bf6a4438a9576  /dev/sdc
[0:0:3:0]    disk    0x6000c29d06fccc829484bc6f56767a0f  /dev/sdd
[0:0:4:0]    disk    0x6000c2909730c5c39d05ff6afd552c22  /dev/sde
[0:0:5:0]    disk    0x6000c29e116828d445fd2b8f8c5d67b9  /dev/sdf
[0:0:6:0]    disk    0x6000c297ebf0717d746a5faecf03ce65  /dev/sdg
[2:0:0:0]    cd/dvd                                  /dev/sr0

===================================================================

Also, if I try to compile a newer version of lsblk to have the --json 
option, the wwn is blank :

[root at xxx ~]# /opt/util-linux-2.38.1/bin/lsblk --json -o +wwn
{
    "blockdevices": [
       {
          "name": "sda",
          "maj:min": "8:0",
          "rm": false,
          "size": "512M",
          "ro": false,
          "type": "disk",
          "mountpoints": [
              null
          ],
          "wwn": null,

Cheers,

-- 
Nicolas