Here is a simple way

unmap dev SymDevName[:SymDevName] from dir
DirectorNum:ALL | DirectorNum:PortNum>
[, emulation=CELERRA_FBA]
[, devmask_access=remove | retain];

what is it you are trying to achieve ? there may be another way of doing this without grep and awk.  

This is indeed simple way to unmap from all the FAs,

but I want some of the FAs only, should be unmapped,  before that I need to check each device which are mapped, and for that I have my own script

and I want to eliminate the FAs which I dont want to be unmapped.

would it be faster to dump info with "symdev list -sid 123 -FA XX -p X" and then run your device list through a loop and grep them out from the FAs dump files ?

Hello,

Sanjit is right, you can designate specific directors and ports (not just ALL:ALL) for unmapping - which is quite common for a variety of reasons.. See the "Array Controls" guide for more information. But appears you know this.

My suggestion is to first make a run through this manually and using the "preview" option for symconfigure. Pulling out devices from FA ports when not expected is of course dangerous - especially with filesystems, VG's, etc..

However, I believe what you are trying to do is list all devices on a specific array that is mapped: "symdev -sid xxxx list -multiport" and on the flip side you have the "-noport" for devices that are not mapped..

Give it a shot, review the output and perhaps this will help in a different angle. Let me know if I am in the ballpark of what you are trying to achieve..

Thank You Raff, Your solution worked, And giving points  as Correct Answer ,Thanks for all your answers.

but From Dir all:all; can unmap the devices from all the FAs, that will be useful only  if you are completely reclaiming the device from all the hosts.

These devices are already migrated from one host to another and I want to take out the FAs of previous hosts.  Hope I am clear now.