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  2. SquashFS - Wikipedia

    en.wikipedia.org/wiki/SquashFS

    Squashfs is a compressed read-only file system for Linux. Squashfs compresses files, inodes and directories, and supports block sizes from 4 KiB up to 1 MiB for greater compression. Several compression algorithms are supported. Squashfs is also the name of free software, licensed under the GPL, for accessing Squashfs filesystems.

  3. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    Single file NIfTI format, used extensively in biomedical imaging. 6E 69 31 00: ni1: 344 hdr Header file of a .hdr/.img pair in NIfTI format, used extensively in biomedical imaging. 52 41 46 36 34: RAF64: 0 Report Builder file from Digital Metaphors: 56 49 53 33: VIS3: 0 Resource file Visionaire 3.x Engine: 4D 53 48 7C 42 53 48 7C: MSH| BSH| 0 hl7

  4. JFFS2 - Wikipedia

    en.wikipedia.org/wiki/JFFS2

    Journalling Flash File System version 2 or JFFS2 is a log-structured file system for use with flash memory devices. [1] It is the successor to JFFS . JFFS2 has been included into the Linux kernel since September 23, 2001, when it was merged into the Linux kernel mainline as part of the kernel version 2.4.10 release.

  5. Magic number (programming) - Wikipedia

    en.wikipedia.org/wiki/Magic_number_(programming)

    JPEG/Exif files contain the null terminated string "Exif" (45 78 69 66 00), followed by more metadata about the file. PNG image files begin with an 8-byte signature which identifies the file as a PNG file and allows detection of common file transfer problems: "\211PNG\r\n\032\n" (89 50 4E 47 0D 0A 1A 0A).

  6. Universally unique identifier - Wikipedia

    en.wikipedia.org/wiki/Universally_unique_identifier

    This number would be equivalent to generating 1 billion UUIDs per second for about 86 years. A file containing this many UUIDs, at 16 bytes per UUID, would be about 43.4 exabytes (37.7 EiB). The smallest number of version-4 UUIDs which must be generated for the probability of finding a collision to be p is approximated by the formula

  7. Orders of magnitude (data) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(data)

    2 76 bits – Maximum volume and file size in the Unix File System (UFS) and maximum disk capacity using the 64-bit LBA SCSI standard introduced in 2000 using 512-byte blocks. [20] 10 23: 1.0 × 10 23 bits – increase in information capacity when 1 joule of energy is added to a heat-bath at 1 K (−272.15 °C) [21] 2 77

  8. ext4 - Wikipedia

    en.wikipedia.org/wiki/Ext4

    ext4 (fourth extended filesystem) is a journaling file system for Linux, developed as the successor to ext3.. ext4 was initially a series of backward-compatible extensions to ext3, many of them originally developed by Cluster File Systems for the Lustre file system between 2003 and 2006, meant to extend storage limits and add other performance improvements. [4]

  9. Type–length–value - Wikipedia

    en.wikipedia.org/wiki/Type–length–value

    The type and length are fixed in size (typically 1–4 bytes), and the value field is of variable size. These fields are used as follows: Type A binary code, often simply alphanumeric, which indicates the kind of field that this part of the message represents; Length The size of the value field (typically in bytes); Value