09-02-2014
VirtualBox
I want to change my virtual box disk to immutable. When I try to do that I get the following error.
Error changing medium type from Normal to Immutable.
Cannot change the type of medium '/root/VirtualBox VMs/fedora13/fedora13.vmdk' because it is attached to 1 virtual machines
Please help me how to resolve this. My host system is RHEL 5.6
Last edited by fpmurphy; 09-02-2014 at 10:54 PM..
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LEARN ABOUT OSX
moose::cookbook::basics::immutable
Moose::Cookbook::Basics::Immutable(3) User Contributed Perl Documentation Moose::Cookbook::Basics::Immutable(3)
NAME
Moose::Cookbook::Basics::Immutable - Making Moose fast by making your class immutable
VERSION
version 2.0604
SYNOPSIS
package Point;
use Moose;
has 'x' => ( isa => 'Int', is => 'ro' );
has 'y' => ( isa => 'Int', is => 'rw' );
__PACKAGE__->meta->make_immutable;
DESCRIPTION
The Moose metaclass API provides a "make_immutable()" method. Calling this method does two things to your class. First, it makes it faster.
In particular, object construction and destruction are effectively "inlined" in your class, and no longer invoke the meta API.
Second, you can no longer make changes via the metaclass API, such as adding attributes. In practice, this won't be a problem, as you
rarely need to do this after first loading the class.
CONCLUSION
We strongly recommend you make your classes immutable. It makes your code much faster, with a small compile-time cost. This will be
especially noticeable when creating many objects.
AUTHOR
Moose is maintained by the Moose Cabal, along with the help of many contributors. See "CABAL" in Moose and "CONTRIBUTORS" in Moose for
details.
COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Infinity Interactive, Inc..
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
perl v5.16.2 2012-09-19 Moose::Cookbook::Basics::Immutable(3)