Solaris

Did you find out what was using all the space? Your plan to just grow it puts you in a worse position in my opinion.

How do you plan to recover if there is a critical failure? Perhaps a hardware error (even if it's virtual) or some sort of corruption? With all your data in / then you are having the root filesystem open and active nearly all the time. Even an unexpected shutdown (e.g. power loss) could leave you needing to fsck which for such a huge / will take a long time and if it doesn't work then you have lost your server.

I would strongly recommend thinking about splitting up the root filesystem to hold just the critical OS and keeping anything not needed for the boot on other filesystems.



Robin

You can use "live upgrade" to create a new disk layout on a second disk (looks like you already have a mirror running, just take the second half of the mirror) and move your system to the second disk. All you need is one reboot to boot in to the new system. After that, you can use the old disk as second half of the mirror.

Beginners guide to Oracle Solaris Live Upgrade

There is more documentation about that matter on the Oracle site.

What is the problem with root (/) ?
Why do you need to expand it ?
Can it be achieved with other methods (new mountpoint, symlink or similar) ?

Services on the machine should be separated from system partitions for various reasons, one being to simplify future configuration changes and needs.

This is not required, but i consider it good practice.
So, change the service in question if you can, take a look what is taking up space and what is that space needed for in root(/)



Hope that helps
Regards
Peasant.

Thanks for all the replies.
So i asked the team to provision 20 GB LUN , can i move /var from / to te newly provisioned LUN?

If yes, how will i be able to do it ? Should i boot from a LIVE CD and do it ? we dont have a solaris OS CD as of now .Is there any other alternatives to do it.Thanks again for all the help

What about answering to the questions asked by the various people that tried to help you instead of insisting to go a way that is more that likely doomed, given the fact you looks to have not enough experience and skills to achieve it?

Hello All,
I tried to look at clearing space , cleared all logs and crash dump files ,And looks like i will not be able to delete anything further.

I tried talking to my peer and he says that we will not be able to delete anything .

Should i try the method i posted earlier?Thanks for any help

So you have a server that presumably had no disk space issues during more than a decade and suddenly there is not enough space in the root file system. How do you explain that?
What do you need that space for?