[PDF] Parallels Server 5 Bare Metal

Reducing the Disk Capacity
Managing Virtual Machines and Containers
Parallels Server Bare Metal provides a possibility to reduce the size of an expanding virtual disk by
setting the limit the disk cannot exceed. In general, the process of reducing a virtual disk includes
these steps:
1 Finding out the minimum capacity to which the disk can be reduced.
2 Running the prl_dsk_tool resize command to reduce the disk.
Checking the Minimum Disk Capacity
Before reducing a virtual disk, you may wish to see the minimum capacity to which it can be
reduced. To do this, use the prl_disk_tool resize --info command. For example, you
can run the following command to get detailed information on the MyVM-0.hdd disk:
# prl_disk_tool resize --info --hdd /vz/MyVM.pvm/MyVM-0.hdd
Operation progress 100 %
Disk information:
Size: 65537M
Minimum: 2338M
Minimum without resizing the last partition: 65523M
The information on the virtual disk is presented in the form of the following table:
Column Name Description
Size The virtual disk disk capacity, in megabytes, as it is seen from inside
the virtual machine.
Minimum The virtual disk capacity, in megabytes, after resizing the disk using
the prl_disk_tool utility with the --resize_partition
option.
Minimum without
resizing the last
partition
Reducing the Disk Size
The virtual disk capacity, in megabytes, after resizing the disk using
the prl_disk_tool utility without the --resize_partition
option.
Once you know the minimum capacity of the virtual disk, you can start reducing it. For example, to
reduce the MyVM-0.hdd disk to 30 GB, you can execute the following command:
# prl_disk_tool resize --size 30G --hdd /vz/MyVM.pvm/MyVM-0.hdd --resize_partition
Operation progress 100 %
When reducing the disk capacity, keep in mind the following:
• You cannot reduce the capacity of a virtual disk if the virtual machine using this disk is running.
• The virtual machine using the virtual disk you want to configure must not have any snapshots.
Otherwise, you will be informed of this fact:
# prl_disk_tool resize --size 68000 --hdd /vz/MyVM.pvm/MyVM-0.hdd/
This disk has one or more snapshots and cannot be resized.
You need to delete snapshots using the pctl tool before resizing the disk.
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