' extenddisk_parted else echo -e 'Disk Size not changed after rescan, already rescanned previously ? Force extension with -f. if then echo -e 'Underlying disk $ disk is larger now. Usage () /size ) # Check if the disk is larger now and proceed with the partition expansion if it is. # If the extended disk size is recognized by the OS already, you can force resizing with the -f flag. # By default it rescans the SCSI bus to check a change in disk size if the disk was hot-extended, which is easy with VMs, and only then proceeds. # The script will first resize the partition by changing the partition end sector of the selected partition, and then after a reboot resize the filesystem. This script is only intended for MBR partitioned disks and not for GPT. # Tested with CentOS6, RHEL6, CentOS7, RHEL7. Can be used on physical or virtual machines alike. #! /bin/bash # Script to resize a LVM Partition after extending the underlying disk device. If you have any suggestions or improvements (which I’m sure there is plenty of room for), feel free to drop a comment or an issue or a pull-request on Github. You can get the most recent version of this script on Github here. I’ve tested it with RHEL 6/7 and CentOS 6/7, but it should generally work with other Linux distributions as well. This script will work with VMs and physical servers alike. There are other ways to extend the disk space including creating a new partition on the additional disk space, but I’ve decided against that approach in favor of a single-partition scheme for management/simplicity’s sake.

It will rescan the disks (skip with -f), resize the existing partition (basically just setting a different end sector), reboot, and run scripts to extend the actual file system after the reboot.

The script assumes that you have extended the existing underlying physical (or “virtual” if it’s a VM) storage device prior to execution. Here’s a script I wrote a while a go to extend LVM partitions on Linux machines.

Fsresizer