AIX - Device Management

AIX- Device Management

In this device management, we can do following things.

1. Make/Add a Device
2. Change Device
3. List Device
4. Remove Device
5. List Device properties
6. List Device configuration


1. Make/Add a Device

We want to install new device in server, this case we should run following command
Suppose we want to install new Hard disk

#smitty mkdev (not recommended)

After executing the above command, one sort will come; in this sort we should fill some details about hard disk drive, such as model, make, capacity, etc.

The above command is not recommended because first we should know all the details about HDD, so instead of that we can use cfgmgr command.

When we run the cfgmgr command it will detect all the newly installed devices,

First you connect hard disk and run the cfgmgr command it will detect the hdd.

#cfgmgr (It will detect the all the devices)

#cfgmgr scsi0

Directly you want to detect hard disk then directly u should check the hdd parent device scsi0

When you run the above command it will detect only Scsi0 devices i.e. HDD, Cdrom, and Tape.

Like this we can configure newly installed devices.


2. Change Device

Suppose we want to change device configuration, this case we should run following command.

We want to change PVID (Physical volume ID) for Hdd

#chdev –l hdisk0 –a pv=clear (To clear the PVID)
#chdev –l hdisk0 –a pv=yes (To assign the PVID)

Whenever we installing the new hdd, system will generate some Identification number for hdd, we can change this PVID using chdev commands

Like this we can change duplex mode for network card and block size for tape media.

#chdev –l inet0 –a hostname=si (To change the host name for inet0)

#chdev –l rmt0 –a block_size=512 (To Change tape drive block_size is 512 blocks)

#chdev –l ent0 –a media_speed=100_full_duplex (To Change Ethernet card duplex speed)



3. List Device

Suppose we want to list device configuration details, this case se should run following command.

Whenever we list the device information that information is listed from ODM because ODM is storing the device information.

#lsdev –C (To list the Customized device configuration information from ODM)
#lsdev – P (To list the Predefined device configuration information from ODM)

The above commands list the object class device information; it will list all the device information.



Suppose we want to see particular device (object) information,

#lsdev –Cc disk
#lsdev –Cc processor
#lsdev –Cc adapter
#lsdev –Cc memory

C – Customized (object class)
c – for device (object)

If any confusion please refer the ODM notes


4. Remove Device

Suppose you want to remove device from server. Suppose it is one HDD.

First you have removed the HDD from server. Then you checking device configuration details using

#lsdev –Cc disk

Or

#odmget CuDv

It will show the device status

There is two options is available in device removal

#rmdev –dl hdisk5

The above command is used to remove hdisk5 device from ODM (complete removal from OS)

After executing the above command this hdisk5 configuration is not available in ODM

#odmget CuDv | grep hdisk5

It wont display anything because device configuration is removed from ODM

Suppose you want to remove device from the server not from ODM
This case you should use the following command.

#rmdev –l hdisk5

The above command is used to remove hdisk5 device from server, this device configuration is available in ODM (not from OS)

After executing the above command this hdisk5 configuration is available in ODM and device status is defined

#odmget CuDv | grep hdisk5

It will show Hdisk5 configuration details but device status is 0


If you want install hdisk5 device again, you should run the following command

#cfgmgr

#cfgmgr scsi0 (Directly you can search device on Parent device scsi0)

After executing above commands the device hdisk5 become to Available state.
And device status is 1

5. List device Properties (attributes)


Suppose you want to check the device attributes details, you should use following commands.


You want to see memory details,

#lsattr –El mem0 (For memory)
#lsattr –El processor0 (For processor)
#lsattr –El ent0 (For Ethernet card)
#lsattr –El rmt0 (For Tape drive)

E – Effective
l - Device
Like this all the devices.


6. List device Configuration


Suppose you want to check the device configuration details, you should use following commands.

Suppose you want to see HDD FRU number

#lscfg (it will show full system information)

#lscfg –vl hdisk0 (It will show HDD configuration details FRU)
#lscfg –vl eth0 (It will so MAC address details of eth0)

Like this all the devices.

NOTE:
#bindprocessor –q (It will show processor information)

Suppose you are using backup device, currently connected and configured with server.

First you switch on the server, at this time tape driver is not switched on. While booting the server, it is checking the tape drive, but tape is now powered on so tape drive is moved to defined state, status will be 0, Now tape drive is switched on now we want to activate the tape drive, we can activate the tape drive without rebooting the server using
#mkdev –l rmt0 (After executing the command tape drive is come to available state)

AIX - ODM (Object Data Manager)

AIX - ODM (Object Data Manager)


ODM generally used for Maintain the System information, whenever we install and reconfigure the hardware device and software, that information’s added in ODM,

Mainly ODM used to store the following information’s

1. Hardware vital product data information
2. Software information
3. Smit menu
4. Nim
5. TCPIP
6. Error log
1. Device configuration information
2. Display information for SMIT (menus, selectors, and dialogs)
3. Vital product data for installation and update procedures
4. Communications configuration information
5. System resource information.
But we cannot see any ODM information in file format, but this ODM information available in many files and different path,
1. /etc/objrepos
2. /usr/lib/objrepos
3. /usr/share/lib/objrepos
NOTE:
For ODM some variable entry available in /etc/environment file.U should not edit anything in this file. If you want to check the variable entry using command
#env
The above command is used to display the variable details
ODM has two kinds of Databases
1. Pre-defined (PdDv)
2. Customized(CuDv)


1. Predefined
In this predefined Database has one Object class (PdDv) and Objects i.e.
PdDv (Object class)
Object: (Physical Information’s)
Floppy drive
Harddisk drive
Mouse like this all the devices.


2. Customized

In this customized Database has one Object class (CuDv) and Objects i.e.

CuDv (Object class)

Objects: (Installed configuration information’s)

Hdisk0
Hdisk1
Fd0
Sa0
Rmt0
Cd0
Scsi0 like this all the devices

ODM States:

ODM has two states

1. Available (device status will be 1)
2. Defined (device status will be 0)

Suppose we are installing one HDD in server. That device is currently accessible this is available state.

Suppose that installed device is removed from server or hdd has failed. This case that device is moved to defined state. i.e. that device configuration is available in server but currently device is not accessible.

We can see this available and defined device status using odmget command

#odmget CuDv ( It will display the customized device status)




ODM Commands:

For object:

1. odmadd
2. odmchange
3. odmget
4. odmdelete

1. odmadd

The above command is used to manually we can add object information in ODM

2. odmchange

The above command is used to change configurations for object in ODM
3. odmget

#odmget –q name=hdisk0 CuDv

The above command is used to display the specified object hdisk0 information in ODM

We can see this available and defined device status using odmget command

#odmget CuDv (It will display the customized device status)


4. odmdelete

#odmdelete –o CuDv –q name=hdisk0
The above command is used to delete the specified object hdisk0 in ODMe

For object class:

1. odmcreate
2. odmdrop
3. odmshow




1. odmcreate

The above command is used to manually we can add object class (PdDv) in ODM

2. odmdrop

The above command is used to stop the specified Object class in ODM
3. odmshow
The above command is used to display the specified object class in ODM

NOTE:
You should not add, delete, change, for object and object class in ODM
(100 % we don’t have permissions for ODM)