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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]
ext4 – A follow-up for ext3 and also a journaled filesystem with support for extents. ext3cow – A versioning file system form of ext3. FAT – File Allocation Table, initially used on DOS and Microsoft Windows and now widely used for portable USB storage and some other devices; FAT12, FAT16 and FAT32 for 12-, 16-and 32-bit table depths.
Maximum filename length Allowable characters in directory entries [cc] Maximum pathname length Maximum file size Maximum volume size [cd] Max number of files AdvFS: 255 characters Any byte except NUL [ce] No limit defined [cf] 16 TiB (17.59 TB) 16 TiB (17.59 TB) ? APFS: 255 UTF-8 characters Unicode 9.0 encoded in UTF-8 [96]? 8 EiB (9.223 EB ...
The limit on partition size was dictated by the 8-bit signed count of sectors per cluster, which originally had a maximum power-of-two value of 64. With the standard hard disk sector size of 512 bytes, this gives a maximum of 32 KB cluster size, thereby fixing the "definitive" limit for the FAT16 partition size at 2 GB for sector size 512.
Ubuntu 9.10: ext4: 2009 Fedora 11: ext4 [5] 2010: LibreWRT: SquashFS: ... Windows 10: NTFS 3.1 2015 Fedora 22: ... GUID Partition Table (GPT)
The Windows Subsystem for Linux added in the Windows 10 Anniversary Update uses them for similar purposes, storing the Linux file mode, owner, device ID (if applicable), and file times in the extended attributes. [27] Additionally, NTFS can store arbitrary-length extended attributes in the form of alternate data streams (ADS), a type of ...
[10] The original version of Squashfs used gzip compression, although Linux kernel 2.6.34 added support for LZMA [ 11 ] and LZO compression, [ 12 ] Linux kernel 2.6.38 added support for LZMA2 compression (which is used by xz ), [ 13 ] Linux kernel 3.19 added support for LZ4 compression, [ 14 ] and Linux kernel 4.14 added support for Zstandard ...
It facilitates read and write access to the ext2, ext3 and ext4 file systems. The driver can be installed on Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows 8, [3] Windows 10, Windows Server 2008, Windows Server 2008 R2. [1] Support for Windows NT was dropped in version 0.30. [4]