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Eraser: Heidi Computers Limited GNU GPL v3: Windows: Yes external [7]? HDDerase: University of California, San Diego: Freeware: OS independent, based on DOS: No internal [8]? hdparm: Mark Lord BSD license: Linux: Yes internal [9] not directly supported without scripting nwipe: Martijn van Brummelen GNU GPL v2: Linux: Yes external Yes Parted_Magic
Data erasure (sometimes referred to as data clearing, data wiping, or data destruction) is a software-based method of data sanitization that aims to completely destroy all electronic data residing on a hard disk drive or other digital media by overwriting data onto all sectors of the device in an irreversible process. By overwriting the data on ...
Since an erase of the cells in the page is needed before it can be written to again, but only entire blocks can be erased, an overwrite will initiate a read-erase-modify-write cycle: [7] [12] the contents of the entire block are stored in cache, then the entire block is erased from the SSD, then the overwritten page(s) is written into the ...
It supports a variety of data destruction standards, including British HMG IS5 (Infosec Standard 5), American DoD 5220.22-M, and the Gutmann method which features a 35-pass overwrite. [ 7 ] The tool has been recommended in TechAdvisor , [ 8 ] The Guardian , [ 3 ] and PC World , [ 9 ] and is a tool suggested by the United States government ...
The most common form of erasure coding used in storage systems is Reed-Solomon (RS) code, an advanced mathematics formula used to enable regeneration of missing data from pieces of known data, called parity blocks. In a (k, m) RS code, a given set of k data blocks, called "chunks", are encoded into (k + m) chunks.
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The process of putting data into blocks is called blocking, while deblocking is the process of extracting data from blocks. Blocked data is normally stored in a data buffer, and read or written a whole block at a time. Blocking reduces the overhead and speeds up the handling of the data stream. [3] For some devices, such as magnetic tape and ...
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