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Write blocking, a subset of write protection, is a technique used in computer forensics in order to maintain the integrity of data storage devices. By preventing all write operations to the device, e.g. a hard drive , it can be ensured that the device remains unaltered by data recovery methods.
Device configuration overlay (DCO) is a hidden area on many of today's hard disk drives (HDDs). Usually when information is stored in either the DCO or host protected area (HPA), it is not accessible by the BIOS (or UEFI), OS, or the user. However, certain tools can be used to modify the HPA or DCO.
A portable Tableau write-blocker attached to a hard drive Example of a portable disk imaging device A Tableau forensic write blocker A Tableau forensic disk imager A forensic disk controller or hardware write-block device is a specialized type of computer hard disk controller made for the purpose of gaining read-only access to computer hard ...
Enhanced Write Filter (or EWF) is a component of Windows XP Embedded and Windows Embedded Standard 7 which stores volume changes on another medium instead of applying them to the original volume. [1] EWF allows the writes to be discarded or committed to the original volume later (either directly or through inaction based on the configuration).
For example, audio tracks on such media cannot be easily added to a personal music collection on a computer's hard disk or a portable (non-CD) music player. Also, many ordinary CD audio players (e.g. in car radios) had problems playing copy-protected media, mostly because they used hardware and firmware components also used in CD-ROM drives ...
In 1984, Rob Northen was hired by Acornsoft to write copy protection routines for their published software, such as the original Elite for the BBC Micro.Northen left the company six months later and started his own company Copylock Software, while still working part-time for Acornsoft to write copy protection routines, file systems and disk utilities.
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Data erasure tools can also target specific data on a disk for routine erasure, providing a hacking protection method that is less time-consuming than software encryption. Hardware / firmware encryption built into the drive itself or integrated controllers is a popular solution with no degradation in performance at all.