If you face the issue with free space on our disk in Zimbra and decide to increase the size, I propose you to consider two scenarios:
First - You have less than 4 partitions in your virtual disk, like below and you need to extend the disk.
Disk /dev/sda:
Device Boot Start End Blocks
Id System
/dev/sda1 *
2048 2099199 1048576
83 Linux
/dev/sda2 2099200 419430399 208665600 8e Linux LVM
/dev/sda3 419430400 629145599 104857600 8e Linux LVM
Second - You have 4 partitions in your virtual disk,
Disk /dev/sda:
Device Boot Start End Blocks
Id System
/dev/sda1 *
2048 2099199 1048576
83 Linux
/dev/sda2 2099200 419430399
208665600 8e Linux LVM
/dev/sda3 419430400 629145599
104857600 8e Linux LVM
/dev/sda4 629145600 671088639
20971520 8e Linux LVM
