You can increase disk sizes in vmware guests whilst they are running. This is supported, but Linux will not see the new size of the disk until it reboots. There is a way around this (assuming here we are using LVM disks): 1. Increase the disk size in the vmware settings. 2. Logon as root onto the Linux guest system. 3. Do: echo "1" > /sys/class/scsi\_device/<device>/device/rescan ..where is the SCSI bus you wish to rescan.