[RESOLVED]LVExtend on RHEL6

bravored · 10-30-2015, 11:47 PM

Morning All,
I have rhel6 with partition with 2.5TB size and its gpt
So I already in the past extend the vg so I have another 2.5TB FREE
What I want to do is extend lv to 500gb from 2.5TB from making it 3TB.
The way I figure is
umount partition
run lvextend -L500GB /dev/mapper/chewy-nfs
run resize2fs /dev/mapper/chewy-nfs

and e2fsck -f if needed

Anyone has done this already provide any insight?

GPT makes me nervous.

berndbausch · 10-31-2015, 12:11 AM

Code:

umount partition 
lvextend -L500GB /dev/mapper/chewy-nfs
resize2fs /dev/mapper/chewy-nfs

I am not sure what you mean by "partition", and why you want to unmount it. Can you give us the output of pvs and df?

The two other lines look good if /dev/mapper/chewy-nfs

is in a volume group that has enough space
is currently smaller than 500GB
has an ext3 or ext4 filesystem on it

Quote:

GPT makes me nervous.

Why? It's over 15 years old and proven. Besides, you are working with LVM here, not GPT. What makes me nervous is your remark that you want to umount something.

syg00 · 10-31-2015, 12:34 AM

GPT isn't a problem, not specifying the parms correctly will be.

Code:

-L, --size [+]LogicalVolumeSize[bBsSkKmMgGtTpPeE]
              Extend or set the logical volume size in units of megabytes.  A size suffix of M for megabytes, G  for  gigabytes,  T  for  ter
              abytes,  P  for  petabytes  or E for exabytes is optional.  With the + sign the value is added to the actual size of the logical
              volume and without it, the value is taken as an absolute one.

My emphasis added.

bravored · 10-31-2015, 07:27 AM

Thanks for the tips guys!
berndbausch,
/dev/mapper/chewy-nfs /chewy
It an nfs share/partition, what ever u want to call it.

syg0, I've used the +SIZEGB for a long time, never had any issue
lvextend -LSIZEG lvm name i.e lvextend /dev/mapper/vg3-lv1 /dev/sdc2
*lvextend -L+SIZEG lvm name for exisiting size
*lvextend -l +100FREE "" or lvextend -l extents etc..
<response back from server>
# lvextend -L+500GB /dev/mapper/chewy-nfs
Extending logical volume nfs to 3.12 TB
Logical volume nfs successfully resized

I only need to do the lvextend since I was already done with adding the drive, parted expanding the drive and vgextended like months ago.

RIght now I'm stuck at e2fsck, Only 3.7 % completed since this morning.

hortageno · 10-31-2015, 05:42 PM

lvextend -r ... can also resize the filesystem at the same time.

bravored · 11-01-2015, 08:51 AM

My e2fsck begun to pick up as soon I shutdown non essential services i.e nfs(nfs server), portmap, auditd, (the main services running for the app has already been turned off)

Hortageno, it says to use fsadm with lvextend -r (I've already done lvextend -L500GB /dev/mapper/chewy-nfs
. I typically do resize2fs /dev/mapper/chewy-nfs after it) It doesn't look it would fit my current scenario.
Thanks for the tip - I will try it on test env.

Thanks

bravored · 11-01-2015, 12:28 PM

All good
Server is back online with the extended disk of 3.1TB