Devices management.  

ODM keeps track of  everything on the system, as
for devices we have two types of  categorization

1) Predifined Database
2) Customized Database


1) Predefined database :  "Support devices", drivers are already installed

#lsdev -P -H          (P for predefined devices, H for heading)
Gives us list

Listing particular class

#lsdev -Pc tape    (P for predefined devices, c for class)
#lsdev -Pc disk

#lsdev -Pc tape    --To lookup the predefined db for support for tape device


2) Customized database :  "Customized devices as per requirement"

#lsdev -C -H

Status is important.
Available means ready to use.
Defined means only driver available



Device Attributes

All the devices have what is called as attributes.

Now to list the attributes of a devices
#lsattr -EH -l mem0    (E for effective attr,l logical device

keylock
realmem
iostat

Check for User settable columns, where it says whether it could be
modified or not


Every devices has a logical device located in /dev directory
ls -l /dev // To see the devices attached to your system