Drive Vaccine protects your system by write protecting the hard drive at the physical sector level, similar to the way that you write protect floppy disks by setting the write protect tab.
When an application needs to write to the hard drive, Drive Vaccine automatically redirects file writes to a separate non-write protected area on the hard drive. All attempted changes to the hard drive are recorded in the storage area. Changed data is read from this specific storage area, instead of the hard drive, appearing as if it had been changed on the hard drive. This method allows full protection of your computer files while still offering complete access to your system. The next time the system is rebooted, all changes are discarded. :D
in addition to explicitly protected partitions, Drive Vaccine also protects any non-file system areas (such as the partition map) on any disk drive that contains protected partitions. Drive Vaccine will also refuse a request to do a low-level format on any disk drive that contains protected volumes. :D
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