Command	Description
lsdev	Display devices in system and their characteristics
lsdev -C	Display information about all devices in the Customised Devices object class using the -C flag.
lsdev -P -H	Display information about all devices in the Predefined Devices object class using the -P flag. Also include header.
lsdev -Cc disk	Display devices in class disk
lsdev -Cc tape	Display devices in class tape
lsdev -Cc cdrom	Display devices in class CDROM
cfgmgr	Configures devices and optionally installs device software
rmdev -l rmt0	Remove a device
rmdev -l rmt0 -d	Remove a device and its entry from database.
lsattr -El rmt0	Displays attribute characteristics values of attributes for device rmt0
chdev -l rmt0 -a block_size=0	Change attribute value. Current attribute values from lsattr command
lsdev -Cc memory	Display devices in class memory
lsattr -El mem0	Display attributes for memory module mem0.

Command	Description
lsvg	Displays information about volume groups.
lsvg rootvg	Display information about rootvg.
lsvg -p rootvg	Display physical volumes.
lsvg -l rootvg	Display logical volumes.
Mkvg	Create a new volume group, using the physical volumes
extendvg	Adds physical volumes to a volume group.
Reducevg	Remove physical volumes from a volume group. When all physical volumes removed from the volume group, the group is deleted.
Command	Description
Lspv	Displays information about a physical volume within a vg.
lspv hdisk0	Display information about physical volume hdisk0.
varyonvg datavg	Activates volume group.
varyonvg datavg	Deactivates volume goup.
exportvg datavg	Removes the definition of the volume group datavg from the system.
importvg	Imports a volume group definition from a set of physical volumes.

Create a logical volume test in rootvg with 4 logical partions and using physical disk hdisk0.

# mklv -y test rootvg 4 hdisk0

List all the logical volumes in rootvg, and

# lsvg -l rootvg

There can be three mirrors of an lv. The command below shows details of all three for lv test.

# lslv -m test

If currently there is only one copy, more can be added to total three. Make a total of 2 copies with the new copy on hdisk1.

# mklvcopy test 2 hdisk1

Add 2 more logical partitions to lv test.

# extendlv test 2

If staus in lsvg -l rootvg is open/stale, use following to sync

# syncvg -l test

It is easy to make filesystem in a lv by using smit fs . Create a filesystem. The /etc/filesystems file is similar to /etc/vfstab in solaris. It contains mount info for all filesystems. Filesystem size can also be changed from same menu but from command line:

# chfs -a size=+32000 /test

Remove a lv from one disk

# rmlvcopy test 1 hdisk0

Or migarte from one disk to other

# migratepv -l test hdisk0 hdisk1

Remove a filesystem and logical volume

# rmfs /test

# rmlv test

 See the command dump here for steps to create a logical volume and filesystems.

List paging space

# lsps -a

Make paging device with four logical partitions from rootvg

# mkps -a -s4 rootvg hdisk0

The newly created paging device will be listed in logical volume list of rootvg.

# lsvg -l rootvg

Specify additional swap devices

# swapon /dev/pagging00

Change the size of paging space

# chps -s4 paging00

Inactivate on next reboot.

# chps -n paging00

File /etc/swapspaces specifies the paging space devices activated by the swapon -a

command.

The /etc/inittab file supplies the script to the init command's role as a general process dispatcher. Following are commands to manage this file:

# lsitab -a

# chitab

# mkitab

# rmitab

# telinit Q

To find total memory in system if you are root or any other user:

# bootinfo -r

$ lsattr -E -l sys0 -a realmem

Also for more details

# lsdev -C -c memory

# lsattr -E -lmem0