Add the luns to the mount point

Linux and Unix-Like Red Hat
1

Hi,

What is the procedure require to add the luns to the mount point in linux server.
say for example due to lack of space in the mount point /u03,i want to add
some extra 20gb space to mount point, how to add that ?

What does luns means ?

Regards,
Maddy

2

Hi Maddy,

Lun is nothing but the space given to server from the storage node.
1) You need to scan and detect the lun
2) then need to a add that lun to you the required file system.

Better you can google it to get a better vision about the lun and lvm concepts.

-Siva

3

You will need to know what format the logical volume for u03 is too. Some types support growing, some don't. You may need to take the filesystem out of service and copy it to a new larger one, then mount the new one but it might also be possible to do this on-line without affecting access.

Can you answer these:-

  • What version of RHEL are you using?
  • What devices do you have assigned? (in use and free)
  • How are the disks sliced and what types are the slices?
  • What volume groups do you have, and what are the built from?
  • What type is your logical volume supporting /u03?

Thanks, in advance,
Robin

4

Hi Siva and Robin,

Thank you for letting me know something about lun.

@Robin,

May i know why you require answers for the below questions and request you to provide commands to get you the answers.

  • What version of RHEL are you using?
  • What devices do you have assigned? (in use and free)
  • How are the disks sliced and what types are the slices?
  • What volume groups do you have, and what are the built from?
  • What type is your logical volume supporting /u03?

Thanks,
maddy

5

These questions will need to be answered by you to ensure that you are using the correct commands.

Some options are available in certain versions of the OS. There may be new features and removed old ones, so it's important to know. There isn't anything confidential being requested, and the alternate is that we guess a suggestion and you then respond with an "it didn't work" message and we go round again.

It would also be useful to know what definitions you already have, else we might go off on a wrong option all together.

Perhaps someone asking for help should be open to provide the detail needed to anyone offering help.

If you can't answer, then we will take a long time to fix it. Anyone with total power over a server should be capable of determining such information.

Robin

1 Like
6

Hi Robin,

I got the answer i wanted from Siva and you in first reply itself.I am happy for that.

Regards,
maddy