VIOS Devices Concept :

Devices:

Discover new devices
cfgdev
›››   This is the VIOS equivalent of the AIX cfgmgr command.

List all adapters (physical and virtual) on the system 
lsdev -type adapter

List only virtual adapters 
lsdev -virtual -type adapter

List all virtual disks (created with mkvdev command) 
lsdev -virtual -type disk

Find the WWN of the fcs0 HBA 
lsdev -dev fcs0 -vpd | grep Network

List the firmware levels of all devices on the system 
lsfware -all
›››   The invscout command is also available in VIOS.

Get a long listing of every device on the system
lsdev -vpd

List all devices (physical and virtual) by their slot address 
lsdev -slots

List all the attributes of the sys0 device
lsdev -dev sys0 -attr

List the port speed of the (physical) ethernet adapter eth0
lsdev -dev ent0 -attr media_speed

List all the possible settings for media_speed on ent0
lsdev -dev ent0 -range media_speed

Set the media_speed option to auto negotiate on ent0
chdev -dev ent0 -attr media_speed=Auto_Negotiation

Set the media_speed to auto negotiate on ent0 on next boot 
chdev -dev ent0 \
      -attr media_speed=Auto_Negotiation \
      -perm
Turn on disk performance counters
chdev -dev sys0 -attr iostat=true