In one of our recent articles we explored the benefits of
Instant Recovery Software (IRS). This is a technology that is related to Light Virtualization (LV), but the actual implementation varies between the two technologies.
Within this review, I will reiterate some basic functionality and backup principles that were first mentioned within the LV/IRS introduction article. This is for the benefit of our readers who haven't had the chance to read the original LV/IRS article.
As I noted on that article, the protection offered by Light Virtualization programs works on per-Windows session basis only. All changes to protected volumes are kept strictly within the LV program's cache. The cache is emptied by default upon rebooting and no changes actually stick to the real disk - unless of course the user chooses to explicitly commit the changes before rebooting.
This essentially means that LV apps will not automatically save changes for software installations which require a reboot in order to become functional. When LV protection is activated, the user has to manually commit any changes they want to keep for the next Windows session. If a program has been installed while LV protection is active, and that program needs a reboot in order for it to work, the user must commit all disk changes before rebooting. If the user simply reboots the system, then the new installation will be completely undone, along with any other changes that may have occurred in the meantime.
It is important to understand that committing changes to the real disk with Light Virtualization apps is a one-way-street. Once changes have been committed in this manner, the only way to go back to a previous disk state will be by restoring a conventional backup, assuming of course that a full backup of the disk has already been performed in advance. Or you can use Instant Recovery/Snapshot software for super-fast recoveries, and that's where Rollback RX comes in to play here today.
There aren't many such programs around. Instant Recovery software is a very rare breed of program indeed, and Rollback RX is currently the best developed and most stable amongst them. The greatest benefit of Rollback RX is that it allows users to accumulate changes to the system across several reboots, something that Light Virtualization apps cannot do. With Rollback RX users can create different software setups, which can then be saved as new snapshots at any time. Any of these snapshots can be restored in mere seconds, as and when needed. This enables users to go backwards and forwards in the time-line of their systems, switching between saved snapshots at will.
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