13.5. Resizing a Partition with fdisk The fdisk utility allows you to create and manipulate GPT, MBR, Sun, SGI, and BSD partition tables. On disks with a GUID Partition Table (GPT), using the parted utility is recommended, as fdisk GPT support is in an experimental phase. Before resizing a partition, back up the data stored on the file system and test the procedure, as the only way to change a partition size using fdisk is by deleting and recreating the partition. Important The partition you are resizing must be the last partition on a particular disk. Red Hat only supports extending and resizing LVM partitions. Procedure 13.4. Resizing a Partition The following procedure is provided only for reference. To resize a partition using fdisk : Unmount the device: Run fdisk disk_name . For example: Use the p option to determine the line number of the partition to be deleted. Use the d option to delete a partition. If there is more than one partition available, fdisk prompts you to provide a number of the partition to delete: Use the n option to create a partition and follow the prompts. Allow enough space for any future resizing. The fdisk default behavior (press Enter ) is to use all space on the device. You can specify the end of the partition by sectors, or specify a human-readable size by using + <size> <suffix> , for example +500M, or +10G. Red Hat recommends using the human-readable size specification if you do not want to use all free space, as fdisk aligns the end of the partition with the physical sectors. If you specify the size by providing an exact number (in sectors), fdisk does not align the end of the partition. Set the partition type to LVM: Write the changes with the w option when you are sure the changes are correct, as errors can cause instability with the selected partition. Run e2fsck on the device to check for consistency: Mount the device: For more information, see the fdisk (8) manual page.

Commands:
umount /dev/vda
fdisk /dev/vda Welcome to fdisk (util-linux 2.23.2). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help):
Command (m for help): p Disk /dev/vda: 16.1 GB, 16106127360 bytes, 31457280 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 label type: dos Disk identifier: 0x0006d09a Device Boot Start End Blocks Id System /dev/vda1 * 2048 1026047 512000 83 Linux /dev/vda2 1026048 31457279 15215616 8e Linux LVM
Command (m for help): d Partition number (1,2, default 2): 2 Partition 2 is deleted
Command (m for help): n Partition type: p primary (1 primary, 0 extended, 3 free) e extended Select (default p): *Enter* Using default response p Partition number (2-4, default 2): *Enter* First sector (1026048-31457279, default 1026048): *Enter* Using default value 1026048 Last sector, +sectors or +size{K,M,G} (1026048-31457279, default 31457279): +500M Partition 2 of type Linux and of size 500 MiB is set
Command (m for help): t Partition number (1,2, default 2): *Enter* Hex code (type L to list all codes): 8e Changed type of partition 'Linux' to 'Linux LVM'
e2fsck /dev/vda e2fsck 1.41.12 (17-May-2010) Pass 1:Checking inodes, blocks, and sizes Pass 2:Checking directory structure Pass 3:Checking directory connectivity Pass 4:Checking reference counts Pass 5:Checking group summary information ext4-1:11/131072 files (0.0% non-contiguous),27050/524128 blocks
mount /dev/vda