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Sed/awk : to grep only required pattern disk

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# 1  
Old 08-22-2013
Sed/awk : to grep only required pattern disk
Hi Experts,

Need help with the following:

Desired output:
Only want to get the output marked in green.

The file:

Code:
--- Physical volumes ---
   PV Name                     /dev/disk/disk4704
   PV Status                   available
   Total PE                    6399
   Free PE                     1
   Autoswitch                  On
   Proactive Polling           On

   PV Name                     /dev/disk/disk4705
   PV Status                   available
   Total PE                    6399
   Free PE                     1
   Autoswitch                  On
   Proactive Polling           On


   --- Physical volume groups ---
   PVG Name                    pvgDBSST001
   PV Name                     /dev/disk/disk4704
   PV Name                     /dev/disk/disk4705




- The desired output should be below:
Should be taken from the
PHP Code:
--- Physical volumes --- 
portion , and not from --- Physical volume groups --- portion .

Code:
/dev/disk/disk4704
/dev/disk/disk4705




- What I am trying :

Code:
awk '/PV Name/{print $NF}' file
/dev/disk/disk4704
/dev/disk/disk4705
/dev/disk/disk4704
/dev/disk/disk4705


I am getting 4 entry , 2 from top, 2 from bottom, but I do not want the bottom 2 disk.


Thanks,

---------- Post updated at 07:47 PM ---------- Previous update was at 07:41 PM ----------

Also , how to tell awk to filter the data from first portion only , and not go for searching "PV Name" in the second portion.

How to do a mechanism to search in this portion of data:

Code:
--- Physical volumes ---
   PV Name                     /dev/disk/disk4704
   PV Status                   available
   Total PE                    6399
   Free PE                     1
   Autoswitch                  On
   Proactive Polling           On

   PV Name                     /dev/disk/disk4705
   PV Status                   available
   Total PE                    6399
   Free PE                     1
   Autoswitch                  On
   Proactive Polling           On

---------- Post updated at 08:09 PM ---------- Previous update was at 07:47 PM ----------

Solved:
By removing duplicates.

[CODE]awk '/PV Name/{if(A[$NF]++==0) print $NF }'



Thank you all.
Last edited by rveri; 08-22-2013 at 09:18 PM..
# 2  
Old 08-22-2013
See if that fits you.

Code:
awk '/PV Name/ {if (!a[$NF]++)print $NF}'

This User Gave Thanks to Aia For This Post:
rveri
# 3  
Old 08-22-2013
Aia ,
Thank you...
# 4  
Old 08-23-2013
Code:
awk '/Physical volume groups/ {f=1} !f && /PV Name/ {print $NF}'
/dev/disk/disk4704
/dev/disk/disk4705

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