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Full Discussion: Increase the filesystem size
Operating Systems Linux Red Hat Increase the filesystem size Post 302877086 by Scott on Thursday 28th of November 2013 04:27:09 AM
Old 11-28-2013
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:
Code:
[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:
Code:
[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.
 

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