Linux – How to extend linux root partition size in CentOS 6.9 without LVM

centos6linuxpartition

I installed CentOS 6.9 instance with 50GB HDD in Openstack. It shows only 8GB for the root partition. But I need to allocate entire HDD size (50GB) for root.
fileSystem details

How can I fix this??

Best Answer

Are you using any LVM devices inside the 42 GB partition?

If not, you could proceed like this (as root):

  1. Back up your data
  2. Install parted (if not already installed): yum -y install parted
  3. Remove LVM partitions if present using lvremove

  4. List partitions: parted -l, you get an output like this

    Model: ATA something (scsi)
Disk  /dev/vda:  50GB
Sector size (logical/physical): 512B/512B
Partition table: msdos
Disk Flags: 
Number  Start   End     Size    Type     File system     Flags
 1      1049kB  8GB      8GB    primary  ext4            
 2      8GB    50GB     42GB    primary                  lvm

  5. Remove the partition:

    $ parted
(parted) rm 2

    Verify it's deleted:

    (parted) print
Model: ATA something (scsi)
Disk  /dev/vda:  50GB
Sector size (logical/physical): 512B/512B
Partition table: msdos
Disk Flags: 
Number  Start   End     Size    Type     File system     Flags
 1      1049kB  8GB      8GB    primary  ext4

  6. resize the partition:

    (parted) resizepart 
Partition number? 1
End?  [8.0GB]? 50000

  7. Verify it worked:

    (parted) print
Model: ATA something (scsi)
Disk  /dev/vda:  50GB
Sector size (logical/physical): 512B/512B
Partition table: msdos
Disk Flags: 
Number  Start   End     Size    Type     File system     Flags
 1      1049kB  50GB    50GB    primary  ext4

  8. Quit: (parted) quit and reboot and verify everything works.

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