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2. Disk Utility - Wikipedia

   en.wikipedia.org/wiki/Disk_Utility

   Mac OS X Leopard added the ability to create, resize, and delete disk partitions without erasing them, a feature known as live partitioning. In OS X El Capitan , Disk Utility has a different user interface and lost the abilities to repair permissions due to obsolescence , [ 6 ] create and manage disks formatted as RAID , burn discs, and multi ...

3. List of data-erasing software - Wikipedia

   en.wikipedia.org/wiki/List_of_data-erasing_software

   Disk Utility: Apple: Commercial proprietary software: OS X: Yes external [6]? 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 ...

4. Data erasure - Wikipedia

   en.wikipedia.org/wiki/Data_erasure

   According to the University of California, San Diego Center for Magnetic Recording Research's (now its Center for Memory and Recording Research) "Tutorial on Disk Drive Data Sanitization" (p. 8): "Secure erase does a single on-track erasure of the data on the disk drive. The U.S. National Security Agency published an Information Assurance ...

5. Disk formatting - Wikipedia

   en.wikipedia.org/wiki/Disk_formatting

   Formatting a disk for use by an operating system and its applications typically involves three different processes. [e]Low-level formatting (i.e., closest to the hardware) marks the surfaces of the disks with markers indicating the start of a recording block (typically today called sector markers) and other information like block CRC to be used later, in normal operations, by the disk ...

6. Data remanence - Wikipedia

   en.wikipedia.org/wiki/Data_remanence

   Data remanence is the residual representation of digital data that remains even after attempts have been made to remove or erase the data. This residue may result from data being left intact by a nominal file deletion operation, by reformatting of storage media that does not remove data previously written to the media, or through physical properties of the storage media that allow previously ...

7. Apple Disk Image - Wikipedia

   en.wikipedia.org/wiki/Apple_Disk_Image

   Apple [1] Disk Image is a disk image format commonly used by the macOS operating system. When opened, an Apple Disk Image is mounted as a volume within the Finder.. An Apple Disk Image can be structured according to one of several proprietary disk image formats, including the Universal Disk Image Format (UDIF) from Mac OS X and the New Disk Image Format (NDIF) from Mac OS 9.

8. Disk First Aid - Wikipedia

   en.wikipedia.org/wiki/Disk_First_Aid

   After analyzing the disk directory, Disk First Aid determines whether it is able to repair any damage that was detected. The utility can commonly only fix problems associated with the catalog/extents files and the volume bitmap. [4] Commonly, the program reports that there is an error, but cannot fix it. [3]

9. Trim (computing) - Wikipedia

   en.wikipedia.org/wiki/Trim_(computing)

   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 ...