Rollback Rx
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RollBack Rx is a third party disk utility for Microsoft Windows, that uses a sector mapping algorithm and incremental sector redirection to capture and manage its PC snapshots.
Due to its sector based mapping, RollBack Rx does not recreate files or folders into a temporary drive space — resulting in a larger capacity of incremental snapshots. The RollBack Rx snapshots can be taken manually, or on a schedule or when a particular file is executed.
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[edit] How it Works
RollBack Rx installs to the master boot record, which loads prior to the Windows operating system, this allows a hard drive to be reverted even in the event that the operating system is unable to boot.
[edit] Description
A snapshot is a bit-for-bit map of the hard disk sector. It is a record of how the PC's hard drive is configured at the time a snapshot is taken. The snapshot includes all files including system, data, programs, settings, registry, wallpaper, icons, etc.
[edit] Incremental sector redirection
RollBack Rx core algorithm is based on incremental sector redirection. Windows operates at a cluster level, which consists of multiple disk sectors. Rollback Rx works at the disk sector level.
When a snapshot is taken, RollBack Rx freezes sectors to their current data. If Windows attempts to update that particular sector, Rollback grabs the write and redirects it into unprotected sectors. If Windows attempts to delete that sector, Rollback intercepts the delete. Additional snapshots freezes only those sectors that have been written since the last snapshot.
[edit] Incompatible products
It can be beneficial to disable RollBack Rx prior to using any Windows defragmentation utility, as file relocations are treated by Rollback Rx as relatively large data changes and can therefore cause large snapshots. The current version 8 does not support any third party disk defragmenter. However, defragmentation can be carried out without disabling Rollback Rx, and the data used can be freed by "re-baselining" (which will cause the removal of snapshots taken so far).
[edit] Precautions
RollBack Rx does not support RAID or any server based operating systems.
[edit] References
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