topic Re: how to increase / in Linux RH ENT 4.0 in Operating System - Linux

how to increase / in Linux RH ENT 4.0

kenken_3 — Thu, 17 May 2007 06:04:01 GMT

Hello,

currently I need to increase the space for my / mount point which is /dev/rootvg/lvol00. the file system is ext3 and I have LVM.

Could I have the safer way to do this?

thanks

Re: how to increase / in Linux RH ENT 4.0

kenken_3 — Thu, 17 May 2007 06:23:49 GMT

it looks it is not possible without third party tools to increase / (root) mount point.

how about /usr?

thanks

Re: how to increase / in Linux RH ENT 4.0

Steven E. Protter — Thu, 17 May 2007 06:48:20 GMT

Shalom,

You could use http://www.acronis.com to back up the system to image and try the resize option when restoring it.

You are right about root.

For /usr

lets say /usr is lvol2

Lets say the new disk device, set up in fdisk is /dev/sdb2

pvcreate /dev/sdb2
# may need -f or -ff
vgextend vg_name /dev/sdb2
lvextend -L 6000M /dev/vg_name/lvol2 /dev/sdb2
ext2online /dev/vg_name/lvol2

The lvextend extends to 6000M. You can also specify in GB.

ext2online was deprecated and removed from FC6 and Red Hat 5. resize2fs does the same job with the same command syntax in those releases. I've personally confirmed this fact.

SEP

Re: how to increase / in Linux RH ENT 4.0

Ivan Ferreira — Thu, 17 May 2007 10:27:42 GMT

>> It looks it is not possible without third party tools to increase / (root) mount point.

Not true. I did increase the root paritition without any problems more than one time.

If you have free space in your volume group, you can do it by extending the logical volume using lvextend and then extending the filesystem with ext2online.

Re: how to increase / in Linux RH ENT 4.0

Court Campbell — Thu, 17 May 2007 13:20:51 GMT

# lvextend -l + /dev/rootvg/lvol00

# ext2online /

ex. add 1G to /

# lvexnted -L +1G /dev/rootvg/lvol00
# ext2online /

I do not believe that / on linux has to be in a contiguous space like on HP-UX.

Re: how to increase / in Linux RH ENT 4.0

Court Campbell — Thu, 17 May 2007 13:21:34 GMT

Typo.

this

# lvextend -l + /dev/rootvg/lvol00

should be this

# lvextend -L + /dev/rootvg/lvol00

Re: how to increase / in Linux RH ENT 4.0

Court Campbell — Thu, 17 May 2007 13:25:44 GMT

It was already mentioned, but you need to make sure you have free extents in the volume group before you extend the logical volume.

Re: how to increase / in Linux RH ENT 4.0

dirk dierickx — Fri, 18 May 2007 01:42:20 GMT

Indeed, there should be no problem extending / on linux if you're using LVM.

Unless, / contains /boot. that could be a problem then.

Re: how to increase / in Linux RH ENT 4.0

kenken_3 — Fri, 18 May 2007 08:27:11 GMT

Court,

Thank you for your response.

Have you tried it for the / (root) mount point. I tried other mount points without any problem.

As for this /, I am not very sure. want to ask it before I tried it out.

if it is safe to do it, I will try it.

thanks

Re: how to increase / in Linux RH ENT 4.0

Ivan Ferreira — Fri, 18 May 2007 08:53:12 GMT

>>> As for this /, I am not very sure. want to ask it before I tried it out.

As I say it before, I did it more then one time. It works and it's safe.

If you are unsure, install a test machine and try it first. You can install on a virtual machine like vmware.

Re: how to increase / in Linux RH ENT 4.0

Court Campbell — Sun, 20 May 2007 20:23:31 GMT

Yes, it works fine.