How to extend VG and LVs in RHEL

[Atul Gautam]

Xperts,

Kindly help me......

"How can we extend VG and LVs in RHEL AS4 (Update3)".

I've tried "vgextend" and "lvextend". But this doesn't help me as I think I need to use "extendfs" as well. Please correct me and suggest me the steps as well.

Are there any complications in this and what parameters/steps do I need to keep in mind while doing that.



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ATUL

[Steven E. Protter · Accepted solution]

Shalom ATUL,

A volume group is extended onto a new disk.

I think examples will help here.

lets say i have a volume group that owns /dev/hdc1 the volume group is vg02

I want it to have a new disk I put in called /dev/hdd1

pvcreate /dev/dsk/hdd1
vgextend vg02 /dev/dsk/hdd1

Now I want to extend a filesystem called oradata form its current size 80 MB to 160 MB on the new disk

lvextend -L 160 /dev/vg02/oradata /dev/dsk/hdd1

Next extend the filesystem and we're done.

SEP

[Ivan Ferreira]

The last step needed is resize the file system with ext2online or resize2fs:

umount /filesystem
resize2fs /filesystem
mount /filesystem


OR

ext2online -d -v /filesystem

[Morcos]

Hi Atul,

After doing vgextend and lvextend, you have to run ext2online, for ex:
ext2online /dev/TestVG/TestLV

After I prefer to run e2fsck to Check the file system integrity after the resize.

Ziad

[Atul Gautam]

So Xperts,

If I summarize all the points then ----

1) pvcreate /dev/dsk/hdd1
2) vgextend vg02 /dev/dsk/hdd1
3) lvextend -L 160 /dev/vg02/oradata /dev/dsk/hdd1
4) umount /filesystem
5) resize2fs /filesystem
6) mount /filesystem
OR
6) ext2online /dev/TestVG/TestLV


Kindly correct me if I'm wrong.


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ATUL

[Ivan Ferreira]

Correct!

[Atul Gautam]

Thanks Ivan....

I will first try these steps and then if I'll be successful in what I wanna do...then I'll close this thread.

But thanks a lot for the kind help that I will continue receiving from this grrreat forum.



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Atul

[Alexander Samad]

With the newer kernels you do not need to unmount the ext3 filesystem to resize.

[Atul Gautam]

Thanks Xperts for ur valuable help....




Atul