Adding A LUN from SAN to AIX

Hi Guys,
      Here is an article for you that best describes how you can add a LUN to a AIX machine.
There is no wonder in doing this. As AIX can only be installed on Power Servers and Power Servers are very high cost so small scale companies avoid to have it. But it's power of processing and robustness is remarkable. I am lucky to have an experience on it. In fact I got few training from IBM on AIX administration and Trouble shooting.

1.       Create a  LUN of required size in storage using storage Manager.

2.       Map that LUN to   required hostgroup or host.

3.       Connect to host machine.

4.     run  cfgmgr in root #cfgmgr

5.       #lspv

PVName                PVID             VGName           Status

hdisk0          00f6fed9834f5f14                    rootvg           active

hdisk1          00f6fed9a6e670fa                    datavg          active

hdisk2           none                                          none            none

                                                                                               

6.       #chdev -l hdisk2 -a pv=yes to create a PVID on the disk

     PVName                PVID                VGName        StatuS

     hdisk0          00f6fed9834f5f14              rootvg          active

             hdisk1          00f6fed9a6e670fa             datavg          active

              hdisk2                         id                       none            active

                           

                           or 

 Instead of using above procedure you can also directly go for step-7

7.       We need to assign that harddisk to volumegroup.

If volume group(VG)  is already is there then we can assign that harddisk to that particular VG

#extend  -f  vgname  hdiskn

                                                          (or)

Create a volume group by #smitty  mkvg

o/p:

     hdisk0          00f6fed9834f5f14                    rootvg           active

             hdisk1          00f6fed9a6e670fa                    datavg          active

             hdisk2                   id                                   datavg           active

8.   Then we need to create a logical volume.

     We can create through #smitty mklv

         (or)

 We can create a filesystem   with default  lv  by using the following command;

       #crfs    –v  jfs2  –g  datavg  –a  size=298G  -A  yes  –m   /u03

9.   TO assign pp   Smitty chlv

10.   Lsv g  –l  vgname

11.     TO assign pp s to  chfs –a size=+2G  /u03

12.   Mount /u03