vdisk-expand.sh for TrueNAS Core

This script expands ZFS pool after increasing the size of a virtual disk in VMware ESXi, VirtualBox or BHyve.

Typical usage

When running TrueNAS as a virtual machine with virtual disks when you run out of space, you can increase the size of the virtual disks and then expand the associated ZFS pool with this shell script.

Example with VMware ESXi

• In VMware ESXi, increase the virtual disk size. It can be done while the TrueNAS vm is running.

• Go the the TrueNAS shell and run:

vdisk-expand.sh /dev/da1

Example with VirtualBox

• Power off the FreeNAS vm because VirtualBox does not support online modification of virtual disks.

• Increase the virtual disk size to 16 GB with VBoxManage.

VBoxManage modifyhd freenas-disk1.vdi  --resize 16384

• Power on the TrueNAS virtual machine.

• Go the the TrueNAS shell and run:

vdisk-expand.sh /dev/ada1

Example with BHyve and virtio disks

• Increase the zvol to 200 GB

zfs set volsize=200G tank1/vm/my_zvol

You have to poweroff/poweron the VM to redetect the new size of the disk.

Then run the script:

vdisk-expand.sh /dev/vtbd1

Compatibility

This script is compatible with FreeNAS 11.x and TrueNAS Core 12.0