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)