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Old 06-24-2015, 03:30 AM   #1
mhetreys
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Registered: Jun 2015
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how to create volume with lvcreate when no free space


how to create new volume using lvcreate, if there is no free space.
I used fdisk -l, but it is giving error.

my output of vgdisplay command

[root@oc0018158158 Desktop]# vgdisplay
--- Volume group ---
VG Name vg_oc1443230061
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 464.78 GiB
PE Size 32.00 MiB
Total PE 14873
Alloc PE / Size 14873 / 464.78 GiB
Free PE / Size 0 / 0
VG UUID HnQ86q-OOT1-akAA-hCPk-8rMZ-mPXc-kOzTkY



please help me as i am new to linux.
 
Old 06-24-2015, 04:15 AM   #2
JeremyBoden
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Registered: Nov 2011
Location: London, UK
Distribution: Debian
Posts: 1,627

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Code:
lvs
will give you info about logical volumes.
You could try deleting unwanted files etc from your lv's, followed by
Code:
lvreduce -r ...
Failing that you need to add more physical storage or take some storage from another volume group.

For a summary, see
Code:
sudo lvm
help
...
...
quit
 
Old 06-24-2015, 05:36 AM   #3
mhetreys
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Registered: Jun 2015
Posts: 4

Original Poster
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here is output of lvs

[root@oc0018158158 ~]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
lv_root vg_oc1443230061 -wi-ao---- 456.78g
lv_swap vg_oc1443230061 -wi-ao---- 8.00g
[root@oc0018158158 ~]#
[root@oc0018158158 ~]#
[root@oc0018158158 ~]#
[root@oc0018158158 ~]# lvreduce -r
Please specify either size or extents but not both.
Run `lvreduce --help' for more information.
 
Old 06-24-2015, 07:28 AM   #4
voleg
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Registered: Oct 2013
Distribution: RedHat CentOS Fedora SuSE
Posts: 349

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You are in bad situation, all space assigned to / .
You have to umount FS to reduce it and this is not possible for / .

Therefore you have to backup everything, because reducing is dangerous.

Then you will boot from rescue disk, not mounting local disk, vgscan, vgimport, vgchange -ay.
resize2fs to reduce / to desired size, lvreduce to same size +1m (to be sure).
Then you will have plenty free space to create whatever.

From other point of view, the new volume will be mounted under / , probably you can skip all
this headache and just mkdir ?
 
Old 06-24-2015, 08:32 AM   #5
JeremyBoden
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lvreduce has many variations in parameters - hence the ...
The -r parameter will automatically reduce the file system on the logical volume, safely.
Constructions such as
Code:
lvreduce -r --extents 10%LV /dev/vg-name/lv-name
works for me.
(Change the 10% to whatever is required).

If you presently have one giant extent, this can take a very long time to run.
 
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Old 06-24-2015, 09:18 AM   #6
voleg
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I see, it useful to reread manuals, I was doing this in old school manner.
 
Old 07-01-2015, 06:16 AM   #7
mhetreys
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Registered: Jun 2015
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Thanks..i solved the problem. its due to only one partition.
 
  


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