Increase the filesystem size

Linux and Unix-Like Red Hat
1

Hi
I am using oracle linux 6.4. My hard drive capacity is 500 GB. my filesystem size onbly 50GB. I would like to extend my filesystem size to around 100GB. I tried many codes but still I am not able.
this is the output of df -h :

Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
                       50G  3.6G   44G   8% /
tmpfs                 1.9G  260K  1.9G   1% /dev/shm
/dev/sda2             485M   55M  405M  12% /boot
/dev/sda1             200M  260K  200M   1% /boot/efi
/dev/sdb1              16G  9.5G  5.7G  63% /media/BE3E-B000

and df -k :

Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/VolGroup-lv_root
                      51606140   3744716  45239984   8% /
tmpfs                  1968532       260   1968272   1% /dev/shm
/dev/sda2               495844     55756    414488  12% /boot
/dev/sda1               204580       260    204320   1% /boot/efi
/dev/sdb1             15858688   9941184   5917504  63% /media/BE3E-B000
2

Check the output of pvs, just to make sure there is room to extend the LV. If there's enough space:

# lvextend -L+50G /dev/mapper/VolGroup-lv_root
# resize2fs /dev/mapper/VolGroup-lv_root

Otherwise the free space may be unpartitioned and we need to take different steps.

1 Like
3

Hi
Thanks for your reply. this is the output of the pvs. I don't have free spaces. I have tried your code before, but because of the freespace I won't be able to extend the filesystem size.
I appreciate if you help me.
Output of pvs :

 
Code:
[root@localhost ~]# pvs
  PV         VG       Fmt  Attr PSize   PFree
  /dev/sda3  VolGroup lvm2 a--  465.07g    0
4

Hi.

Is Linux running in a virtual machine, or on the physical hardware?

Assuming the latter, it's likely that the remaining ~450 GB is unpartitioned, depending on what options you selected during the installation.

You can check in fdisk, or the graphical palimpsest partitioning tool, if you prefer. You can create a new partition of the required size.

For example, here's an example where I've created a new partition of 5GB from unpartitioned space on /dev/sda, using fdisk:

[root@admin ~]# fdisk -uc /dev/sda

Command (m for help): p

Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders, total 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0003bc8c

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     1026047      512000   83  Linux
/dev/sda2         1026048    13314047     6144000   8e  Linux LVM

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 3
First sector (13314048-41943039, default 13314048): (pressed Enter to accept default)
Using default value 13314048
Last sector, +sectors or +size{K,M,G} (13314048-41943039, default 41943039): +5G

Command (m for help): p

Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders, total 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0003bc8c

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     1026047      512000   83  Linux
/dev/sda2         1026048    13314047     6144000   8e  Linux LVM
/dev/sda3        13314048    23799807     5242880   83  Linux

Command (m for help): t
Partition number (1-4): 3
Hex code (type L to list codes): 8e
Changed system type of partition 3 to 8e (Linux LVM)

Command (m for help): p

Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders, total 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0003bc8c

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     1026047      512000   83  Linux
/dev/sda2         1026048    13314047     6144000   8e  Linux LVM
/dev/sda3        13314048    23799807     5242880   8e  Linux LVM

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.

Everything I typed is in red. You'll need to reboot to update the partition table.

Now run these commands, substituting volume, volume group, logical volume names and sizes for your own:

[root@admin ~]# pvcreate /dev/sda3 # <-- for me this is what is new, in blue, above
  Physical volume "/dev/sda3" successfully created
[root@admin ~]# vgextend rootvg /dev/sda3
  Volume group "rootvg" successfully extended
[root@admin ~]# pvs
  PV         VG       Fmt  Attr PSize  PFree  
  /dev/sda2  rootvg   lvm2 a--   5.84g 320.00m
  /dev/sda3  rootvg   lvm2 a--   4.97g   4.97g
  /dev/sdb   dist01vg lvm2 a--  20.00g      0 
[root@admin ~]# vgdisplay -s
  "dist01vg" 20.00 GiB [20.00 GiB used / 0    free]
  "rootvg" 10.81 GiB [5.53 GiB  used / 5.28 GiB free]
[root@admin ~]# 
[root@admin ~]# lvextend -L+5G /dev/mapper/rootvg-rootlv # <-- You can substitute -l+100%FREE for -L+5G if there isn't quite 5GB of free space
  Extending logical volume rootlv to 9.03 GiB
  Logical volume rootlv successfully resized
[root@admin ~]# resize2fs /dev/mapper/rootvg-rootlv 
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/mapper/rootvg-rootlv is mounted on /; on-line resizing required
old desc_blocks = 1, new_desc_blocks = 1
Performing an on-line resize of /dev/mapper/rootvg-rootlv to 2367488 (4k) blocks.
The filesystem on /dev/mapper/rootvg-rootlv is now 2367488 blocks long.

If Linux is running in a virtual machine, you should add a new hard disk, then run the same commands for (probably) /dev/sdb.

5

Dear Scott
Thanks alot for your reply. I have followed your code for creating a new partition and I assigned +100G to this. everything was successfull and as you were requested to do a reboot to update the partition, I made a reboot. But I am not able to to access to my GUI. and I'm having an error that is :

****An error ocurred during the file system check.
**** Dropping you to a shell; the system will reboot
****when you leave the shell.
****Warning -- SELinux is active
****Disabling security enforment for system recovery.
**** Run 'setenforce 1' to reenable.

, I run the fsck but it is just hanging, showing pages like matrix and just passing numbers fast. I don't whats happened to my OS.
anyway, maybe I format my pc. But as you mention is it possible to just partition the freespace during OS installation. I want to install Oracle Linux 6.4
I haven't seen any pages during installation regarding to the partitions .

I really appreciate your help and support

6

Can you show the output of:

# fdisk -ucl /dev/sda

(assuming you created the new partition on /dev/sda)

Assuming you have made no other changes, you can delete the partition you just created, being careful not to delete the wrong one, then reboot again.

7

hi.
this is the out put of Fdisk -ucl /dev/sda

WARNING : GPT(GUID partition table) detected on '/dev/sda'!the util doesn't support GPT, Use GNU Parted.

Disk /dev/sda : 500.1 GB. 500107862016 bytes
255 heads, 63 sectors,/track , 60801 cylinders, total 976773168 sectors
units = sectors of 1*512 = 512 bytes
sector size ( logical/phisycal): 512 bytes / 512 bytes
I/O size (minimum/optimal:512 bytes/512 bytes
Disk identifier 0*000000000

Device Boot       Start           End            Blocks              ID              SYSTEM
/dev/sda1          1                976773167  488386583+       ee          GPT